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ARS Home » Northeast Area » Beltsville, Maryland (BHNRC) » Beltsville Human Nutrition Research Center » Food Composition and Methods Development Laboratory » People & Locations » Pei Chen
Pei Chen
Food Composition and Methods Development Laboratory
Research Chemist

Phone: (301) 504-8144 ext. 238
Fax: (301) 504-8314
Room 105B

10300 BALTIMORE AVENUE
BLDG 161 BARC-EAST
BELTSVILLE , MD 207052350
Projects
Metabolite Profiling and Chemical Fingerprinting Methods for Characterization of Foods, Botanical Supplements, and Biological Materials
In-House Appropriated (D)
  Accession Number: 426367
Development of an Expert Program for Identification of Secondary Metabolites
Non-Assistance Cooperative Agreement (S)
  Accession Number: 428211

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Effect of preharvest CaCl2 spray and postharvest UV-B radiation on storage quality of broccoli microgreens, a richer source of glucosinolates -
Lu, Y., Dong, W., Yang, T., Luo, Y., Wang, Q., Chen, P. 2017. Effect of preharvest CaCl2 spray and postharvest UV-B radiation on storage quality of broccoli microgreens, a richer source of glucosinolates. Journal of Food Composition and Analysis. 67(1):55-62. https://doi.org/10.1016/j.jfca.2017.12.035.
Challenges of developing a valid Dietary Glucosinolate database -
Wu, X., Sun, J., Haytowitz, D.B., Harnly, J.M., Chen, P., Pehrsson, P.R. 2017. Challenges of developing a valid Dietary Glucosinolate database. Journal of Food Composition and Analysis. HTTPS://DOI: 10.1016/j.jfca.2017.07.014.
Botanical supplements: detecting the transition from ingredients to supplements -
Harnly, J.M., Lu, Y., Sun, J., Chen, P. 2017. Botanical supplements: detecting the transition from ingredients to supplements. Journal of Food Composition and Analysis. 64:85-92. https://doi.org/10.1016/j.jfca.2017.06.010.
Dual effectiveness of ascorbic acid and ethanol combined treatment to inhibit browning and inactivate pathogens on fresh-cut apples -
Yan, S., Liu, H., Yang, T., Luo, Y., Chen, P. 2017. Dual effectiveness of ascorbic acid and ethanol combined treatment to inhibit browning and inactivate pathogens on fresh-cut apples. LWT - Food Science and Technology. 80:311-320.
Composition of phenolic compounds in wild apple with multiple resistance mechanisms against postharvest blue mold decay -
Sun, J., Janisiewicz, W.J., Evans, B.E., Jurick II, W.M., Chen, P. 2017. Composition of phenolic compounds in wild apple with multiple resistance mechanisms against postharvest blue mold decay. Postharvest Biology and Technology. 127:68-75.
Feruloyl dopamine-O-hexosides are efficient marker compounds for differentiation between Black Cohosh (Actaea racemosa) and related Actaea species – an UHPLC-HRAM-MS Chemometrics Study -
Geng, P., Harnly, J.M., Sun, J., Zhang, M., Chen, P. 2017. Feruloyl dopamine-O-hexosides are efficient marker compounds for differentiation between Black Cohosh (Actaea racemosa) and related Actaea species – an UHPLC-HRAM-MS Chemometrics Study. Analytical and Bioanalytical Chemistry. 127:68-75. https://doi.org/10.1016/j.postharvbio.2017.01.006.
Comprehensive characterization of C-glycosyl flavones in wheat (Triticum aestivum L.) germ using UPLC-PDA-ESI/HRMSn and mass defect filtering -
Geng, P., Sun, J., Zhang, M., Li, X., Harnly, J.M., Chen, P. 2016. Comprehensive characterization of C-glycosyl flavones in wheat (Triticum aestivum L.) germ using UPLC-PDA-ESI/HRMSn and mass defect filtering. Journal of Mass Spectrometry. 64:4407-4415.
GLS-Finder: An Automated Data-Mining System for Fast Profiling Glucosinolates and its Application in Brassica Vegetables -
Sun, J., Zhang, M., Chen, P. 2016. GLS-Finder: An Automated Data-Mining System for Fast Profiling Glucosinolates and its Application in Brassica Vegetables. Analytical Chemistry. 4407:4415.
Differentiation of Bread Made with Whole Grain and Refined Wheat (T. aestivum) Flour Using LC/MS-based chromatographic Fingerprinting and Chemometric Approaches -
Geng, P., Harnly, J.M., Chen, P. 2016. Differentiation of Bread Made with Whole Grain and Refined Wheat (T. aestivum) Flour Using LC/MS-based chromatographic Fingerprinting and Chemometric Approaches. Journal of Food Composition and Analysis. 47:92-100.
Differentiation of the two major species of Echinacea (E. augustifolia and E. purpurea) using a flow injection mass spectrometric (FIMS) fingerprinting method and chemometric analysis -
Lu, Y., Chen, P. 2015. Differentiation of the two major species of Echinacea (E. augustifolia and E. purpurea) using a flow injection mass spectrometric (FIMS) fingerprinting method and chemometric analysis. Analytical Methods. 4:246-251.
Myrosinase-dependent and –independent formation and control of isothiocyanate products of glucosinolate hydrolysis -
Angelino, D., Dosz,.B., Sun, J., Hoeflinger, J.L., Van Tassell, M.L., Chen, P., Harnly, J.M., Miller, M.J., Jeffery, E.H. 2015. Myrosinase-dependent and –independent formation and control of isothiocyanate products of glucosinolate hydrolysis. Frontiers in Plant Science. doi: 10.3389/fpls.2015.00831.
FlavonQ: An Automated Data Processing Tool for Profiling Flavone/flavonol Glycosides Using Ultra High-performance Liquid Chromatography Diode Array Detection and High-Resolution Accurate-Mass Mass Spectrometry (UHPLC HRAM-MS) -
Zhang, M., Sun, J., Chen, P. 2015. FlavonQ: An Automated Data Processing Tool for Profiling Flavone/flavonol Glycosides Using Ultra High-performance Liquid Chromatography Diode Array Detection and High-Resolution Accurate-Mass Mass Spectrometry (UHPLC HRAM-MS). Analytical Chemist. 87:9974-9981.
Comparison of Flow Injection MS, NMR, and DNA Sequencing: Methods for Identification and Authentication of Black Cohosh (Actaea racemosa) -
Harnly, J.M., Chen, P., Sun, J., Huang, H., Colson, K., Yu, J., Mccoy, J.H., Harbaugh Reynaud, D.T., Harrington, P.B., Fletcher, E. 2015. Comparison of Flow Injection MS, NMR, and DNA Sequencing: Methods for Identification and Authentication of Black Cohosh (Actaea racemosa). Planta Medica. 82:250-262.
Differentiation of whole grain and refined wheat (T. aestivum) flour using a fuzzy mass spectrometric fingerprinting and chemometric approaches -
Geng, P., Harnly, J.M., Chen, P., Luthria, D.L., Zhang, M. 2015. Differentiation of whole grain and refined wheat (T. aestivum) flour using a fuzzy mass spectrometric fingerprinting and chemometric approaches. Journal of Agricultural and Food Chemistry. 407:7875-7888.
AOAC SMPR 2014.007: Authentication of selected Vaccinium species (Anthocyanins) in dietary ingredients and dietary supplements -
Krueger, D., Arora, S., Bzhelyansky, A., Chen, P., Chlenov, A., Collison, M., Durst, R., Es-Safi, N., Giancaspro, G., Hall, G., Hammerstone, J., Ingle, P., Jennens-Clough, M., Ji, D., Ji, J., Kennedy, D., Lawson, T., Lee, J., Lock, S., Mudge, E., Neal-Kababick, J., Phillips, M., Phillips, T., Rejaei, A., Rettinger, M., Rimmer, C., R.-Haralambides, A., Royce, S., Schaneberg, B., Solyom, A., Stern, N., Sullivan, D., Szpylka, J., Wise, M.L., Yan, X., Yoo, S., Yu, K., Zhang, Y., Coates, S. 2015. AOAC SMPR 2014.007: Authentication of selected Vaccinium species (Anthocyanins) in dietary ingredients and dietary supplements. Journal of AOAC International. 98(4):1052-1054. doi: 10.5740/jaoac.int.SMPR2014.007.
Differentiation of whole grain from refined wheat (T. aestivum) flour using lipid profile of wheat bran, germ, and endosperm with UHPLC-HRAM mass spectrometry” -
Geng, P., Harnly, J.M., Chen, P. 2015. Differentiation of whole grain from refined wheat (T. aestivum) flour using lipid profile of wheat bran, germ, and endosperm with UHPLC-HRAM mass spectrometry”. Journal of Agricultural and Food Chemistry. 63:6189-6211.
Fingerprinting profile of polysaccharides from Lycium barbarum using multiplex approaches and chemometrics -
Lu, W., Xu, J., Zhu, R., Zhu, Y., Zhao, Y., Chen, P., Pan, C., Yao, W., Gao, X. 2015. Fingerprinting profile of polysaccharides from Lycium barbarum using multiplex approaches and chemometrics. International Journal of Biological Macromolecules. 3:78:230-237.
Discrimination of Aurantii Fructus Immaturus and Fructus Poniciri Trifoliatae Immaturus by Flow Injection UV Spectroscopy (FIUV) and 1H NMR using Partial Least-squares Discriminant Analysis (PLS-DA) -
Zahang, M., Zhang, Y., Harrington, P.B., Chen, P. 2015. Discrimination of Aurantii Fructus Immaturus and Fructus Poniciri Trifoliatae Immaturus by Flow Injection UV Spectroscopy (FIUV) and 1H NMR using Partial Least-squares Discriminant Analysis (PLS-DA). Analytical Letters. 49:711-722.
Metabolomic assessment reveals a stimulatory effect of calcium treatment on glucosinolates contents in broccoli microgreen Reprint Icon -
Sun, J., Kou, L., Geng, P., Huang, H., Yang, T., Luo, Y., Chen, P. 2015. Metabolomic assessment reveals a stimulatory effect of calcium treatment on glucosinolates contents in broccoli microgreen. Journal of Agricultural and Food Chemistry. 8:63(6):1863-1868.
Characterization of phenolic amides from cortex lycii by ultra high-performance liquid chromatography coupled with LTQ-Orbitrap mass spectrometry -
Zhang, J., Guan, S., Sun, J., Liu, T., Chen, P., Feng, R., Chen, X., Hou, J., Yang, W., Wu, W., Yang, M., Guo, D. 2014. Characterization of phenolic amides from cortex lycii by ultra high-performance liquid chromatography coupled with LTQ-Orbitrap mass spectrometry. Journal of Pharmaceutical and Biomedical Analysis. 407:581-95.
High fat diet leads to changes in metabolite patterns in pig plasma, fecal, and urine samples detected by a ultra-high performance liquid chromatography tandem with high resolution mass spectrometry metabolomic study -
Sun, J., Monagas, M., Jang, S., Molokin, A., Harnly, J.M., Urban, J.F., Aguilar, G., Chen, P. 2014. High fat diet leads to changes in metabolite patterns in pig plasma, fecal, and urine samples detected by a ultra-high performance liquid chromatography tandem with high resolution mass spectrometry metabolomic study. Food Chemistry. 15:173:171-178.
Profiling of Glucosinolates and Flavonoids in Rorippa indica (Linn.) Hiern. (Cruciferae) by UHPLC-PDA-ESI/HRMSn. -
Lin, L., Sun, J., Chen, P., Zhang, R., Fan, X., Li, L., Harnly, J.M. 2014. UHPLC-DAD-ESI/HRMSn method to identify the glucosinolates and flavonoids of Rorippa montana (Wall) Small.. Journal of Agricultural and Food Chemistry. 62:6118-6129.
Natural products with health benefits from marine biological resources -
Zhao, Y., Chen, P. 2014. Natural products with health benefits from marine biological resources. Current Organic Chemistry. 10.2174/138527281807140515132853.
Recent advances in ultra-high performance liquid chromatography for the analysis of traditional chinese medicine -
Huang, J., Liu, M., Chen, P. 2014. Recent advances in ultra-high performance liquid chromatography for the analysis of traditional chinese medicine. Analytical Letters. DOI: 10.1080/00032719.2014.888727.
Differentiation of the four major types (C. Burmannii, C. Verum, C. cassia, And C. Loureiroi) of cinnamons using a flow-injection mass spectrometric (FIMS) fingerprinting method -
Chen, P., Sun, J., Ford, P. 2014. Differentiation of the four major types (C. Burmannii, C. Verum, C. cassia, And C. Loureiroi) of cinnamons using a flow-injection mass spectrometric (FIMS) fingerprinting method. Analytical and Bioanalytical Chemistry. 10.1021/jf405580c.
Anthocyanidins and polyphenols in five brassica species microgreens: analysis by UHPLC-PDA-ESI/HRMS/MSn -
Sun, J., Xiao, Z., Lin, L., Lester, G.E., Wang, Q., Harnly, J.M., Chen, P. 2013. Anthocyanidins and polyphenols in five brassica species microgreens: analysis by UHPLC-PDA-ESI/HRMS/MSn. Journal of Agricultural and Food Chemistry. 61:10960-10970.
Single laboratory validation of the determination of yohimbine in yohimbe bark and related dietary supplements using UHPLC/UV/MS -
Chen, P., Bryden, N.A. 2015. Single laboratory validation of the determination of yohimbine in yohimbe bark and related dietary supplements using UHPLC/UV/MS. Journal of Association of Official Analytical Chemists International. 98:896-901.
Differentiation of leaf and whole-plant samples of di- and tetraploid Gynostemma pentaphyllum (Thunb.) Makino using flow-injection mass spectrometric(FIMS) fingerprinting method combined with chemometric approaches -
Zhao, Y., Niu, Y., Xie, Z., Shi, H., Chen, P., Yu, L. 2013. Differentiation of leaf and whole-plant samples of di- and tetraploid Gynostemma pentaphyllum (Thunb.) Makino using flow-injection mass spectrometric(FIMS) fingerprinting method combined with chemometric approaches. Analytica Chimica Acta. 5:1288-1297.
Detection of adulterated Ginkgo biloba supplements using chromatographic and spectral fingerprints -
Harnly, J.M., Luthria, D.L., Chen, P. 2012. Detection of adulterated Ginkgo biloba supplements using chromatographic and spectral fingerprints. Journal of Association of Official Analytical Chemists International. 95:6.
Differentiation of leaf and whole-plant samples of di- and tetraploid Gynostemma pentaphyllum (Thunb.) Makino using flow-injection mass spectrometric(FIMS) fingerprinting method combined with chemometric approaches -
Differentiating organic and conventional sage by chromatographic and mass spectrometry flow-injection fingerprints -
Gao, B., Lu, Y., Chen, P., Liangli, Y. 2013. Differentiating Organic and Conventional Sage by Chromatographic and Mass Spectrometry Flow-Injection Fingerprints. Journal of Agricultural and Food Chemistry. 61:2957-2963.
Authentication of organically and conventionally grown basils by gas chromatograpy/mass spectrometry chemical profiles -
Wang, Z., Chen, P., Yu, L., Harrington, P.B. 2013. Authentication of organically and conventionally grown basils by gas chromatograpy/mass spectrometry chemical profiles. Analytical Chemistry. 85:2945-2953.
Profiling polyphenols of two diploid strawberry (Fragaria vesca) inbred lines using UHPLC-HRMSn -
Sun, J., Liu, X., Yang, T., Solvin, J., Chen, P. 2013. Profiling polyphenols of two diploid strawberry (Fragaria vesca) inbred lines using UHPLC-HRMSn. Analytical Biochemistry. 5:2945-53.
Encapsulation of indole-3-carbinol and 3'3'-diindolylmethane in zein/carboxymethyl chitosan nanoparticles with controlled release property and improved stability -
Lou, Y., Wang, T.T., Teng, Z., Chen, P., Sun, J., Wang, Q. 2013. Encapsulation of indole-3-carbinol and 3'3'-diindolylmethane in zein/carboxymethyl chitosan nanoparticles with controlled release property and improved stability. Food Chemistry. 139(1-4):224-30.
Chromatographic and mass spectrometric fingerprinting analyses of angelica sinensis (Oliv.) diels dietary supplements -
Zhao, Y., Sun, J., Yu, L., Chen, P. 2013. Chromatographic and mass spectrometric fingerprinting analyses of angelica sinensis (Oliv.) diels dietary supplements. Analytical and Bioanalytical Chemistry. doi: 10.1007/s00216-012-6668-1.
Differentiating organic from conventional peppermints using chromatographic and flow-injection mass spectrometric (FIMS) fingerprints -
Gao, B., Qin, F., Chen, P., Shi, H., Liangli, L. 2012. Differentiating organic from conventional peppermints using chromatographic and flow-injection mass spectrometric (FIMS) fingerprints. Journal of Agricultural and Food Chemistry. 60:11987-11994.
UHPLC/HRMS analysis of African mango (Irvingia gabonensis) seeds, seed extracts, and African mango based dietary supplements -
Sun, J., Chen, P. 2012. UHPLC/HRMS analysis of African mango (Irvingia gabonensis) seeds, seed extracts, and African mango based dietary supplements. Journal of Agricultural and Food Chemistry. 60:8703-8709.
Classification of cultivation locations of panax quinquefolius L samples using high performance liquid chromatography-electrospray ionization mass spectrometry and chemometric analysis -
Sun, X., Chen, P., Cook, S., Jackson, G., Harnly, J.M., Harrington, P. 2012. Classification of cultivation locations of panax quinquefolius L samples using high performance liquid chromatography-electrospray ionization mass spectrometry and chemometric analysis. Analytical Chemist. 84:3628-3634.
Classification of cultivation locations of Panax quinquefolius L samples using high performance liquid chromatography-electrospray ionization mass spectrometry and chemometric analysis -
Sun,, X., Chen, P., Cook, S., Jackson, G., Harnly, J.M., Harrington, P. 2013. Classification of cultivation locations of Panax quinquefolius L samples using high performance liquid chromatography-electrospray ionization mass spectrometry and chemometric analysis. Analytical Chemistry. 84:3628-3634.
Recent applications for HPLC-MS analysis of anthocyanins in Food materials -
Sun, J., Long-Ze, L., Chen, P. 2013. Recent applications for HPLC-MS analysis of anthocyanins in Food materials. Current Analytical Chemistry. 9:397-416.
Study of the mass spectrometric behaviors of anthocyanins in negative ionization mode and its applications for characterization of anthocyanins and non-anthocyanin polyphenols -
Sun, J., Lin, L., Chen, P. 2012. Study of the mass spectroscopic behaviors of anthocyanins in negative ionization mode and its applications for fast differentiation of anthocyanins and non-anthocyanin polyphenols in natural products. Rapid Communications in Mass Spectrometry. 26:-1123-1132.
UHPLC-PDA-ESI/HRMS/MSn analysis of anthocyanins, flavonol glycosides, and hydroxycinnamic acid derivatives in red mustard green (Brassica juncea (L) Coss variety) -
Lin, L., Sun, J., Chen, P., Harnly, J.M. 2011. UHPLC-PDA-ESI/HRMS/MSn analysis of anthocyanins, flavonol glycosides, and hydroxycinnamic acid derivatives in red mustard green (Brassica juncea (L) Coss variety). Journal of Agricultural and Food Chemistry. 60:544-553.
Chemical composition, and anti-proliferative and anti-inflammatory effects of the leaf and wholeplant samples of diploid and tetraploid gynostemma pentaphyllum -
Xie, Z., Huang, H., Zhao, Y., Shi,, H., Wang, S., Wang, T.T., Chen, P., Yu, L. 2011. Chemical composition, and anti-proliferative and anti-inflammatory effects of the leaf and wholeplant samples of diploid and tetraploid gynostemma pentaphyllum. Food Chemistry. 132:125-133.
High-performance Liquid Chromatography Mass Spectrometry Analysis of Pantothenic acid (Vitamin B5) in Multivitamin Dietary Supplements -
A flow-injection mass spectrometry fingerprinting method for authentication and quality assessment of Scutellaria lateriflora-based dietary supplements -
Sun, J., Chen, P. 2011. A flow-injection mass spectrometry fingerprinting method for authentication and quality assessment of Scutellaria lateriflora-based dietary supplements. Analytical and Bioanalytical Chemistry. 401:1577-1584.
A flow-injection mass spectrometry fingerprinting method for authentication and quality assessment of Scutellaria lateriflora-based dietary supplements -
Sun, J., Long-Ze, L., Chen, P. 2011. A flow-injection mass spectrometry fingerprinting method for authentication and quality assessment of Scutellaria lateriflora-based dietary supplements. Analytical and Bioanalytical Chemistry. 401:1577-1584.
Profiling the indole alkaloids in yohimbe bark with ultra-performance liquid chromatography coupled with ion mobility quadrupole time-of-flight mass spectrometry -
Sun, J., Chen, P. 2011. Profiling the indole alkaloids in yohimbe bark with ultra-performance liquid chromatography coupled with ion mobility quadrupole time-of-flight mass spectrometry. Journal of Rapid Communications in Mass Spectroscopy. 25:2591-2602.
LC-PDA-EIS/MSn identification of new anthocyanins in purple radish (Raphanus sativus L. variety) -
Lin, L., Jianghao, S., Chen, P., Harnly, J.M. 2011. LC-PDA-EIS/MSn identification of new anthocyanins in purple radish (Raphanus sativus L. variety). Journal of Agricultural food Chemistry . 59:6616-6627.
Differentiation of Panax quinquefolius grown in United States and China using LC/MS-based chromatographic fingerprinting and metabolomic approaches -
Sun, J., Chen, P. 2011. Differentiation of Panax quinquefolius grown in United States and China using LC/MS-based chromatographic fingerprinting and metabolomic approaches. Analytical Biochemistry. 58(8):4545-4553.
Identification, quantitation, and comprehensive assessment of green, white, and pu-erh teas using UPLC/UV/MS -
Zhao, Y., Chen, P., Lin, L., Harnly, J.M. 2011. Identification, quantitation, and comprehensive assessment of green, white, and pu-erh teas using UPLC/UV/MS. Food Chemistry. 126:1269-1277.
Discrimination among Panax species using spectral fingerprinting -
Chen, P., Luthria, D.L., Harrington, P.B., Harnly, J.M. 2011. Discrimination among Panax species using spectral fingerprinting. Journal of the Association of Official Analytical Chemists. 94:1411-1421.
Chromatographic fingerprint analysis and rutin and quercetin compositions in the leaf and whole-plant samples of di- and tetraploid Gynostemma pentaphyllum -
Xie, Z., Zhao, Y., Chen, P., Yu, L. 2010. Chromatographic fingerprint analysis and rutin and quercetin compositions in the leaf and whole-plant samples of di- and tetraploid Gynostemma pentaphyllum. Journal of Agricultural and Food Chemistry. 7:3042-3049.
A non-targeted approach to chemical discrimination between green tea extract-based dietary supplements and green tea leaves by LC/MS -
Sun, J., Chen, P., Lin, L., Harnly, J.M. 2011. A non-targeted approach to chemical discrimination between green tea extract-based dietary supplements and green tea leaves by LC/MS. Journal of the Association of Official Analytical Chemists. 94:487-497.
A LC/UV/Vis method for determination of cyanocobalamin in multivitamin dietary supplements with on-line sample clean-up -
Chen, P., Wolf, W.R., Castanheira, I., Sanches-Silva, A. 2010. A LC/UV/Vis method for determination of cyanocobalamin in multivitamin dietary supplements with on-line sample clean-up. Analytical Methods. 2:1171-1175.
Flow injection mass spectral fingerprints demonstrate chemical differences in rio red grapefruit with respect to year, harvest time, and conventional versus organic farming Reprint Icon -
Chen, P., Harnly, J.M., Lester, G.E. 2010. Flow injection mass spectral fingerprints demonstrate chemical differences in Rio Red grapefruit with respect to year, harvest time, and conventional versus organic farming. Journal of Agriculture and Food Chemistry. 58(8):4545-4553.
Mass spectroscopic fingerprinting method for to differentiation between Scutellaria lateriflora and the Germander (Teucrium canadens and T. chamaedrys species -
Chen, P., Lin, L., Harnly, J.M. 2010. Mass spectroscopic fingerprinting method for differentiation between Scutellaria lateriflora and the Germander (Teucrium canadense and T. chamaedrys) species. Journal of AOAC International. 93(4):1148-1154.
Certificate of Analysis, Standard Reference Material® 1849, Infant/Adult Nutritional Formula -
Wolf, W.R., Byrdwell, W.C., Chen, P., Goldschmidt, R.J., Atkinson, R.L. 2009. Certificate of Analysis, Standard Reference Material® 1849, Infant/Adult Nutritional Formula. Available NIST Website: https://www-s.nist.gov/srmors/view_detail.cfm?srm=1849.
Single Lab Validation of a LC/UV/FLD/MS Method for Simultaneous Determination of Water-soluble Vitamins in Multi-Vitamin Dietary Supplements -
Chen, P., Atkinson, R.L., Wolf, W.R. 2009. Single lab validation of a LC/UV/FLD/MS method for simultaneous determination of water-soluble vitamins in multi-vitamin dietary supplements. Journal of the Association of Official Analytical Chemists. 92(2):680-688.
Chromatographic fingerprint analysis of Pycnogenol® dietary supplements -
Chen, P., Song, F., Lin, L. 2009. Chromatographic fingerprint analysis of Pycnogenol® dietary supplements. Journal of AOAC International. 92(2):624-632.
Chromatographic profiles of Ginkgo biloba leaves and selected products -
Lin, L., Chen, P., Ozcan, M., Harnly, J.M. 2008. Chromatographic profiles of Ginkgo biloba leaves and selected products. Journal of Agricultural and Food Chemistry. http://dx.doi.org/10.1021/jf800488x.
Factors Affecting Resveratrol Content in Strawberries -
Wang, S.Y., Chen, C., Wang, C.Y., Chen, P. 2008. Factors Affecting Resveratrol Content in Strawberries. HortScience. 43(4):1230.2008
Fingerprint of Herb Product by Matrix-assisted Laser Desorption Ionization Mass Spectrometry -
Song, F., Chen, P. 2008. Fingerprint of Herb Product by Matrix-assisted Laser Desorption Ionization Mass Spectrometry. 2008 BARC Poster Day, April 23, 2008, Beltsville, MD.
Simultaneous Determination of Water Soluble Vitamins in Dietary Supplements and Fortified Foods by LC-MS -
Wolf, W.R., Goldschmidt, R.J., Chen, P. 2008. Simultaneous Determination of Water Soluble Vitamins in Dietary Supplements and Fortified Foods by LC-MS.Midwest Section of AOAC International, 2008 Annual Meeting, June 9-11 2008, Bozeman, MT.
Elucidation of the mechanism of enzymatic browning inhibition by sodium chlorite -
He, Q., Luo, Y., Chen, P. 2008. Elucidation of the mechanism of enzymatic browning inhibition by sodium chlorite. Journal of Food Chemistry. 110(4):847-851.
Spectral Fingerprints for Authentication and Identification of Variation in Foods and Botanical Materials -
Harnly, J.M., Luthria, D.L., Chen, P., Lin, L. 2008. Spectral Fingerprints for Authentication and Identification of Variation in Foods and Botanical Materials. Experimental Biololgy Meeting, April 5-9, 2008, San Diego, CA.
Chromatographic Profiles of Ginkgo biloba Leaves and Selected Products -
Lin, L., Chen, P., Ozcan, M., Harnly, J.M. 2008. Chromatographic Profiles of Ginkgo biloba Leaves and Selected Products. Experimental Biololgy Meeting, April 5-9, 2008, San Diego, CA.
Resveratrol Content in Strawberry Fruit is Affected by Preharvest Conditions -
Wang, S.Y., Chen, C., Wang, C.Y., Chen, P. 2007. Resveratrol Content in Strawberry Fruit is Affected by Preharvest Conditions. Journal of Agriculture and Food Chemistry. 55:8269-8274.
Simultaneous Determination of Selected B Vitamins in the NIST SRM 3280 Multivitamin/Multielement Tablets by Liquid Chromatography Isotope Dilution Mass Spectrometry -
Chen, P., Ozcan, M., Wolf, W.R. 2007. Simultaneous determination of selected B vitamins in the NIST SRM 3280 multivitamin/multielement tablets by liquid chromatography isotope dilution mass spectrometry. Analytical and Bioanalytical Chemistry. Available: doi:10.1007/s00216-007-1430-9.
Single Laboratory Validation of a LC/UV/MS Method for Determination of Multiple Water Soluble Vitamins in Dietary Supplements (AOAC Annual Meeting, Minneapolis, MN, Sept, 2006) -
Chen, P., Wolf, W.R. 2007. Single Laboratory Validation of a LC/UV/MS Method for Determination of Multiple Water Soluble Vitamins in Dietary Supplements. AOAC Annual Meeting, September 15, 2006, Minneapolis, Minnesota.
Chromatographic fingerprints analysis for evaluation of Ginkgo Biloba products -
Chen, P., Ozcan, M., Harnly, J.M. 2007. Chromatographic Fingerprints Analysis for Evaluation of Ginkgo Biloba Products. Analytical and Bioanalytical Chemistry. Available on-line doi: 10.1007/s00216-007-1386-9.
Simultaneous Determination of Selected B Vitamins in the NIST SRM 3280 Multivitamin/Multielement Tablets by HPLC Isotope Dilution Mass Spectrometry -
Chen, P., Ozcan, M., Wolf, W.R. 2007. Simultaneous Determination of Selected B Vitamins in the NIST SRM 3280 Multivitamin/Multielement Tablets by HPLC Isotope Dilution Mass Spectrometry. BARC Poster Day, May, 2007, Beltsville, Maryland.
Validation of a LC/UV/MS Method for Determination of Multiple Water Soluble Vitamins in Dietary Supplements (Experimental Biology, April, 2007, Washington, D.C.) -
Wolf, W.R., Chen, P. 2007. Validation of a LC/UV/MS Method for Determination of Multiple Water Soluble Vitamins in Dietary Supplements. Experimental Biology, April 25, 2007, Washington, D.C.
Determination of Selected B-complex Vitamins in the NIST Multivitamin Reference Standard Material by Stable Isotope Dilution Mass Spectrometry (Experimental Biology, April, 2007, Washington, D.C.) -
Chen, P., Ozcan, M., Wolf, W.R. 2007. Determination of Selected B-complex Vitamins in the NIST Multivitamin Reference Standard Material by Stable Isotope Dilution Mass Spectrometry. Experimental Biology, April 25, 2007, Washington, D.C.
Determination of Ginkgolides and Flavonols in Ginkgo Biloba Products and NIST Ginkgo Reference Standard by LC/UV/MS (Experimental Biology, April, 2007, Washington, D.C.) -
Ozcan, M., Chen, P. 2007. Determination of Ginkgolides and Flavonols in Ginkgo Biloba Products and NIST Ginkgo Reference Standard by LC/UV/MS. Experimental Biology, April 25, 2007, Washington, D.C.
Synthesis of safflomide and its HPLC measurement in mouse plasma after oral administration -
Park, J.B., Chen, P. 2007. Synthesis of safflomide and its HPLC measurement in mouse plasma after oral administration. Journal of Chromatography B: Biomedical Applications. 852(1-2):398-402.
Comparison of the Terpene Lactones and Flavonols Contents in Ginkgo Biloba Commercial Samples and the NIST Standard Reference Materials Using LC/UV/MS -
Ozcan, M., McAuley, B., and Chen, P. 2007. Comparison of the Terpene Lactones and Flavonols Contents in Ginkgo Biloba Commercial Samples and the NIST Standard Reference Materials Using LC/UV/MS. Journal of Food and Drug Analysis. 15(1):55-62
LC/UV/MS-MRM for the simultaneous determination of water-soluble vitamins in multi-vitamin dietary supplements -
Chen, P., Wolf, W.R. 2006. LC/UV/MS-MRM for the simultaneous determination of water-soluble vitamins in multi-vitamin dietary supplements. Analytical and Bioanalytical Chemistry, 387(7):2441-2448.
Development and Validation of a High-Throughput Based on Liquid Chromatography with UV/MS Detection Method for Quantitation of Cichoric Acid in Echinacea purpurea Aerial-Based Dietary Supplements -
Chen, P., Wolf, W.R. 2006. Development and Validation of a High-Throughput Based on Liquid Chromatography with UV/MS Detection Method for Quantitation of Cichoric Acid in Echinacea purpurea Aerial-Based Dietary Supplements. Journal of Association of Official Analytical Chemists International. 89:(3)612-618.
DEVELOPMENT OF AN EFFICIENT, SCALABLE, ALDOLASE-CATALYZED PROCESS FOR ENANTIOSELECTIVE SYNTHESIS OF STATIN INTERMEDIATES -
Greenberg, W.A., Varvak, A., Hanson, S.R., Wong, K., Huang, H., Chen, P., Burk, M.J. 2004. Development of an efficient, scalable, aldolase-catalyzed process for enantioselective synthesis of statin intermediates. #89158. 101(16):5788-5793.
CREATION OF A PRODUCTIVE, HIGHLY ENANTIOSELECTIVE NITRILASE THROUGH GENE SITE SATURATION MUTAGENESIS (GSSM) -
Greenberg, W.A., Varvak, A., Hanson, S.R., Wong, K., Huang, H., Chen, P., Burk, M.J. 2004. Creation of a productive, highly enantioselective nitrilase through gene site saturation mutagenesis (GSSM). Proceedings of the National Academy of Sciences. 101(16):5788-5793.
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