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 DIMETHYLACETAMIDE and DIMETHYLFORMAMIDE: METHOD 2004, Issue 2, dated 15 August 1994 - Page 4 of 4

90.4, and 92.2%, respectively. A storage study for five days at 1.5 mg dimethylformamide per silica gel tube gave a recovery of 91.7%. Overall sampling and measurement precision, SˆrT, was 0.056.

REFERENCES: [1]

[2]

Documentation of the NIOSH Validation Tests, S254 (Dimethylacetamide) and S255 (Dimethylformamide), U.S. Department of Health, Education, and Welfare, Publ. (NIOSH) 77-185 (1977), available as GPO Stock #017-033-00231-2 from Superintendent of Documents, Washington, DC 20402. NIOSH Manual of Analytical Methods, 2nd ed., Vol. 3, S254 and S255, U.S. Department of Health, Education, and Welfare, Publ. (NIOSH) 77-157-C (1977).

METHOD REVISED BY: C. Neumeister, NIOSH/DPSE; S254 and S255 originally validated under NIOSH Contract CDC-99-74-45.

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