Page Banner

United States Department of Agriculture

Agricultural Research Service

Research Project: ECOLOGICALLY BASED PEST MANAGEMENT IN MODERN CROPPING SYSTEMS

Location: Integrated Cropping Systems Research

Title: Inter-laboratory validation of standardized method to determine permeability of plastic films)

Author
item Papiernik, Sharon
item Yates, Scott
item Qian, Yaorong
item Ajwa, Husein
item Gao, Suduan
item Qin, Ruijun
item Sances, Frank
item Spokas, Kurt

Submitted to: Meeting Abstract
Publication Type: Abstract only
Publication Acceptance Date: 5/17/2012
Publication Date: 8/19/2012
Citation: Papiernik, S.K., Yates, S.R., Qian, Y., Ajwa, H., Gao, S., Qin, R., Sances, F., Spokas, K.A. 2012. Inter-laboratory validation of standardized method to determine permeability of plastic films. 244th American Chemical Society National Meeting, August 19-23, 2012, Philadelphia PA. AGRO 80, vol. 82, p. 101.

Interpretive Summary:

Technical Abstract: To support regulations controlling soil fumigation, we are standardizing the laboratory method we developed to measure the permeability of plastic films to fumigant vapors. The method was validated using an inter-laboratory comparison with 7 participants. Each participant evaluated the mass transfer coefficient (h) of multiple fumigant compounds through 4 films of varying permeability. Standard methods were used to determine outliers, usually 1 value per analysis. For film-chemical combinations with h>1 cm h-1 (relatively high permeability), the coefficient of variation of h values reported by individual participants was 0.05 (for methyl bromide) to 0.3 (for trans-1,3-D). For a film with at least 100 times lower permeability, the coefficient of variation of h values ranged from 0.1 to 1.1. Results of the round-robin test show that h values can be measured with precision, even for low-permeability films, indicating that this method is robust.

Last Modified: 8/24/2016
Footer Content Back to Top of Page