NIOSH validated analytical methods for the determination of p- nitroaniline (100016), formic-acid (64186), hafnium (7440586), tantalum (7440257), phosphorus-pentachloride (10026138), alpha- naphthylthiourea (86884), sodium-fluoroacetate (62748), phosphine (12768820), ammonium-sulfamate (7773060), and 2,2,4-dichlorophenoxy- ethanol (136787) are described. The methods are intended for determining compliance with federal standards, and demonstrating the needs for controls or research. Each method contains a description of the working range, sensitivity, and detection limit. Substances that may interfere with each method are described. The precision and accuracy of each method are given. The advantages and disadvantages of each method are considered. Required apparatus and reagents are specified. Sampling and analytical procedures were detailed. Calibration and standardization procedures are noted. The computational procedures for treating the data is described. Data used to validate each method is presented. NIOSH methods should not be considered the only procedures available for evaluating occupational exposure; other methods meeting the accuracy requirements of the standard may also be used. The NIOSH methods will be periodically reviewed and modified as new developments in science and technology may require.
Division of Physical Sciences and Engineering, NIOSH, U.S. Department of Health and Human Services, Cincinnati, Ohio, 274 pages, 51 references