Evaluating Kaolin Clay as a Potential Substance for ISO Sprayer Cleaning System Tests

Highlights Guidelines for measuring ASP ® 602 concentrations with a spectrophotometer or turbidimeters were established. Concentration predictions had errors between 0.1% and 24.6% the range from 0 to 100 ppm instruments. Stationary portable instruments able detect as low 2 ppm. Test results ISO 22368-1 validated that could be used inspecting cleanout agitation systems. Abstract. ASP® (kaolin clay) was evaluated an alternate material performing sprayer clean out test standard. Recommendations sample homogenization, measurement temperature sizes address potential concerns technical challenges in assaying samples provided under relevant conditions. Linear regression models predicting (mg·L-1) mixtures developed using outputs two different turbidimeters. showed three measure Validations of approximation 0.9% 18.4% turbidimeters, respectively. However, their maximum absolute less than 3.7 2.3 within validation range. Two cleaning systems following procedure. Residue reduction factors initial mixture concentration 163 one system which did not meet 16119-2 environmental requirement (factor over 400) 819 other exceeded requirement. Analysis tests testing substance evaluate differentiate performance sprayers. Keywords: Absorbance, 602, Standard, Pesticide, Spectrophotometer, Turbidity.