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 ARSINE: METHOD 6001, Issue 2, dated 15 August 1994 - Page 4 of 4 EVALUATION OF METHOD: Method S229 [6] was evaluated over the range 0.094 to 0.404 mg/m 3 using 10-L air samples collected on SKC Lot 105 activated coconut charcoal [1]. Breakthrough (onto the backup section) did not occur after 240 min of sampling at 0.227 L/min from an arsine concentration of 0.405 mg/m 3 (0.022 mg loading). The recovery was found to be 93.7%. Desorption efficiency was 0.90 at 1 µg arsine per sample and 1.00 at 2 and 4 µg arsine per sample. Method P&CAM 265 [5] was evaluated over the range 0.001 to 0.01 mg/m 3 using 15-L air samples [2]. These samples were collected on SKC Lot 106 activated coconut charcoal at a sampling flow rate of 0.875 L/min for 15 min. At this flow rate, a collection efficiency of 89.1% was found [3]. The effect of high humidity on the sampler capacity was not studied. Desorption efficiency was 0.90 in the range 0.015 to 0.2 µg arsine per sample.

REFERENCES: [1] Documentation of the NIOSH Validation Tests, S229, U.S. Department of Health, Education, and Welfare, Publ. (NIOSH) 77-185 (1977), also available as Order No. PB 263959 from NTIS, Springfield, VA 22161 (1975). [2] Evaluation and Refinement of Personal Sampling Method for Arsine, NIOSH Research Report, prepared under NIOSH Contract No. 210-76-0142 (NIOSH, unpublished, 1977). [3] Costello, R. J., P. M. Eller and R. D. Hull. Measurement of Multiple Inorganic Arsenic Species, Am. Ind. Hyg. Assoc. J., 44(1), 21-28 (1983). [4] Methods 7900 (Arsenic) and 7901 (Arsenic Trioxide), this Manual. [5] NIOSH Manual of Analytical Methods, 2nd. ed., V. 4, P&CAM 265, U.S. Department of Health, Education, and Welfare, Publ. (NIOSH) 78-175 (1978). [6] NIOSH Manual of Analytical Methods, 2nd. ed., V. 3, S229, U.S. Department of Health, Education, and Welfare, Publ. (NIOSH) 77-157-C (1977). [7] Criteria for a Recommended Standard...Occupational Exposure to Inorganic Arsenic, U.S. Department of Health, Education, and Welfare, Publ. (NIOSH) 77-149 (1977).

METHOD REVISED BY: R. D. Hull, Ph.D., NIOSH/DBBS.

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94