Page:NIOSH Manual of Analytical Methods - 1001.pdf/4

 METHYL CHLORIDE: METHOD 1001, Issue 2, dated 15 August 1994 - Page 4 of 4 min when sampling at 0.105 L/min from an atmosphere containing 1425 mg/m 3 at 84% RH. Desorption efficiency for 18 samples in the range 0.16 to 0.62 mg methyl chloride averaged 0.99 with s r = 0.02. Desorption with carbon disulfide, chloroform, or ethanol as eluent gave lower recoveries. Samples stored in the laboratory for seven days gave a mean recovery of 95% relative to samples analyzed immediately after collection.

REFERENCES: [1] [2] [3] [4] [5] [6]

[7] [8]

Backup Data Report S99, available as "Ten NIOSH Analytical Methods, Set 2," Order No. PB 271-464, from NTIS, Springfield VA 22161. UBTL report for Sequence #4131-L,M (NIOSH, unpublished, November 28, 1983). NIOSH Manual of Analytical Methods, 2nd ed., Vol. 4, S99, U.S. Department of Health, Education, and Welfare, Publ. (NIOSH) 78-175 (1978). Ibid., Vol. 1, P&CAM 201, U.S. Department of Health, Education, and Welfare, Publ. (NIOSH) 77-157-A (1977). NIOSH Current Intelligence Bulletin 43, Monohalomethanes, U.S. Department of Health and Human Services, Publ. (NIOSH) 84-117 (September 27, 1984). NIOSH/OSHA Occupational Health Guidelines for Chemical Hazards, U.S. Department of Health and Human Services, Publ. (NIOSH) 81-123 (1981), available as Stock #PB83-154609 from NTIS, Springfield, VA 22161. NIOSH Current Intelligence Bulletin 46, U.S. Department of Health and Human Services, Publ. (NIOSH) 86-114 (1986). NIOSH Research Report-Development and Validation of Methods for Sampling and Analysis of Workplace Toxic Substances, U.S. Department of Health and Human Services, Publ. (NIOSH) 80-133 (1980).

METHOD REVISED BY: Y. T. Gagnon and G. David Foley, NIOSH/DPSE.

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