Laboratory test methods to measure repellency, retention, and penetration of liquid pesticides through protective clothing - Part I: Comparison of three test methods

In the last three decades, different test methods have been used to assess the level of protection provided by various textile materials against liqui d pesticide penetration. Of these, the ISO 6350/EN368 gutter test is curren tly used to screen garment materials for certification of type 6 personal p rotective equipment (PPE) in Europe. The atomizer test method developed in Germany is used to evaluate the performance Of PPE marketed there. In addit ion, a pipette method is being proposed as an American Society of Testing a nd Materials (ASTM) test method in the United States. This study compares t he three test methods and determines the suitability, of these methods for screening protective clothing materials against liquid pesticides. Six fabr ics selected to represent the woven and nonwoven fabrics used while handlin g and spraying pesticides are contaminated with dilute pesticide formulatio ns following the three test methods. Repellency, pesticide retention, and p enetration characteristics of the test materials are measured. The results indicate that the evaluation of fabric performance is affected by the test method.