The NIOSH Method No. S116 for sampling allyl-chloride (107051) is detailed along with the Sampling Data Sheet No. S116 and the backup data report. Included in the method description are the principle, range and sensitivity, interference, precision and accuracy, advantages and disadvantages, description of the apparatus, reagents used, description of the procedure, calibration and standards, and calculations. The method is designed for the eight-hour time- weighted average standard for allyl-chloride of 1 ppm (3 milligrams per cubic meter), and it has been validated over the range of 1.80- 7.19 milligrams per cubic meter for a 100-liter sample at 24 degrees centigrade and 759 millimeters of mercury atmospheric pressure. The method uses a charcoal tube to trap the organic vapors, and the analyte is desorbed with benzene. The sample is separated and analyzed using a gas chromatograph with a flame ionization detector. The coefficient of variation for the sampling is 0.071, which corresponds to a 0.21 milligram per cubic meter standard derivation at the OSHA standard level. The sampling device is small, portable and involves no liquids. However, the amount of sample which can be taken is limited by the number of milligrams that the tube will hold before overloading. The precision is limited by the reproducibility of the pressure drop across the tubes.
Documentation of NIOSH Validation Tests, Method S116, NIOSH, Cincinnati, Ohio