Thiram Analytical Method: Filter Collection, Acetonitrile Extraction, HPLC, UV at 254 NM (Failure Rept. No. S256)

摘要

The NIOSH analytical method S256 for determining thiram (137268) in air is described. Samples are collected on Teflon filters, extracted with acetonitrile, and analyzed by high pressure liquid chromatography with an ultraviolet detector at 254 nanometers. The working range of the method is 3.0 to 12.2 milligrams per cubic meter, the coefficient of variance to 0.055, and the detection limit is 5.0 micrograms per sample. Analytical apparatus, reagents and procedures are described, and calculations are provided for determining sample concentrations. Data on collection efficiency, and recovery and stability rates is included.