Round-Robin Testing of Methods for Collecting Dislodgeable Residues from Carpet

摘要

A round-robin test was conducted using six volunteer participants to evaluatethree dislodgeable residue methods in sampling on new carpets treated with a commercial pesticide formulation. Seven separate tests were performed, each using a formulation containing three target pesticides (chlorpyrifos, pyrethrin I, and piperonyl butoxide). Strict QA/QC guidelines were followed as each participant performed replicate sampling with the Southwest Research Institute polyurethane foam (PUF) roller, the California roller, and the Dow drag sled methods. Sampling precision, as determined by the percent relative standard deviation (%RSD) for three replicate samples, was high for all three methods for measurements of this type. The transfer efficiency rates found in this study were substantially higher than those reported in earlier studies of this type.