HYDROGEN SULFIDE: METHOD 6013, Issue 1, dated 15 August 1994 - Page 4 of 4 30 days. Recoveries, based on mass of H 2S found on samples analyzed on day 1, were 97.2% for ambient storage and 98.9% for refrigerated storage. The overall method for H 2S has a limit of detection of 11 µg per sample and a limit of quantitation of 17 µg per sample. A mean bias of -0.17% was determined from the recoveries of six samples generated at each of four concentration levels (0.1, 0.5, 1 and 2 x PEL) with a precision ( Sr) of 0.031. The method had a total precision including pump error ( SrT) of 0.059, and an estimate of overall error of ±11.6%.
REFERENCES: [1] Cassinelli, ME, Backup Data Report, NMAM 6013, Hydrogen Sulfide. NIOSH/DPSE (1992). [2] NIOSH Manual of Analytical Methods, 2nd ed., V. 2, S4, U.S. Department of Health, Education, and Welfare, Publ. (NIOSH) 77-157-B (1977). [3] NIOSH Manual of Analytical Methods, 2nd ed., V. 6, P&CAM 296, U.S. Department of Health and Human Services, Publ. (NIOSH) 80-125 (1980).
METHOD WRITTEN BY: Mary Ellen Cassinelli, NIOSH/DPSE.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
