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ARS Home » Southeast Area » New Orleans, Louisiana » Southern Regional Research Center » Cotton Structure and Quality Research » Research » Publications at this Location » Publication #343880
Research Project: Improved Quality Assessments of Cotton from Fiber to Final Products

Location: Cotton Structure and Quality Research

Title: Effect of instrumental leaf grade on HVI micronaire measurement in commercial cotton bales

Author
item Liu, Yongliang
item Delhom, Christopher

Submitted to: Journal of Cotton Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 6/21/2018
Publication Date: 10/12/2018
Citation: Liu, Y., Delhom, C.D. 2018. Effect of instrumental leaf grade on HVI micronaire measurement in commercial cotton bales. Journal of Cotton Science. 22:136-141.

Interpretive Summary: High volume instrument (HVITM) instrumental leaf grade index has been accepted in both domestic and international cotton fiber trading. There is of interest in how trash content in cotton samples impact the HVI measurements. In this investigation, HVI micronaire attribute was measured on cotton lint representing instrumental leaf grade 1 to 6 categories before (pre-) and after (post-) Shirley Analyzer (SA) cleaning process. SA system was used since it is a traditional gravimetric cotton trash reference method and also has a small-scale cleaning function for bulky fibers. This study first examined the variations of 5 repeated HVI micronaire measurements within one pre-SA or post-SA cleaning cotton, and it revealed an insignificant effect of trash presence in high instrumental leaf grade cottons on HVI micronaire measurement repeatability. Then, comparison of HVI micronaire between pre-SA and post-SA cleaning cottons indicated a good agreement, suggesting minimal effect of cotton trash presence in raw cottons on their HVI micronaire determination. Meanwhile, higher instrumental leaf grade cottons were observed to show lower micronaire value.

Technical Abstract: High volume instrument (HVITM) instrumental leaf grade index has been accepted in both domestic and international cotton fiber trading. There is one interest on how trash content in cotton fibers impacts the HVI quality measurement. In this investigation, HVI micronaire attribute was measured on cotton lint representing instrumental leaf grade 1 to 6 categories before (pre-) and after (post-) Shirley Analyzer (SA) cleaning process. SA system was used since it is a traditional gravimetric cotton trash reference method and also has a small-scale cleaning function for bulky fibers. This study first examined the variations of 5 repeated HVI micronaire measurements within one pre-SA or post-SA cleaning cotton, and it revealed an insignificant effect of trash presence in high instrumental leaf grade cottons on HVI micronaire measurement repeatability. Then, comparison of HVI micronaire between pre-SA and post-SA cleaning cottons indicated a good agreement, suggesting the least effect of cotton trash presence in raw cottons on their HVI micronaire determination. Meanwhile, higher instrumental leaf grade cottons were observed to show lower micronaire value.