CH RO MIUM , HEX AVA LEN T: Me thod 7605, Issue 1 dated 15 M arch 200 3 - Page 5 o f 5 [8] NIOSH [1975]. Criteria for a recomm ended standard: occupational exposure to chro m ium (VI). Cincinnati, OH: U.S. Department of H ealth, E duc ation, a nd W elfare ; National Ins titute for Occupational Safety and Health; DHEW (NIOSH) Publication No. 76-129. [9] W ang J, A sh ley K , Ke nn ed y ER, Neumeister C [1997]. Determination of hexavalent chromium in industrial hygiene sa m ples using ultrasonic extraction and flow injection a nalysis. Ana lyst 122: 13071312. [10] Ndung’u K, Djane N-K, Malcus F, Mathiasson L [1999]. Ultrasonic extraction of hexavalent ch rom ium in solid samples followed by automate d a na lysis using a combination of supported liquid mem brane extra ction a nd u v detection in a flow system . Ana lyst 124: 1367-1372. [11] W ang J, Ashley K, Marlow D, En gland EC , Carlton G [1999]. Field me thod for the determination of hexavalent chromium by ultrasonic and strong anion exchange solid phase extraction. Anal Chem 71: 1027-1032. [12] EC/IRMM [1997]. Certificate of analysis, CR M545: C r(V I) and tota l leacheable Cr in welding dust loaded on a filter. Brussels: Comm ission of the European Comm unities, Institute for Reference Materials and Me asu rem ents . [13] Burka rt JA [1986]. General procedures for limit of detection calculations in industrial hygiene chem istry laboratory. Appl Ind Hyg, 1(3): 153-155 .
MET HOD CO NTRIBUTO RS: Kevin Ashley, NIOSH/DART. Penny A. Foote, DataChem Laboratories, Inc., Salt Lake City, Utah James B. Perkins, DataChem Laboratories, Inc, Salt Lake City, Utah Don C. W ickman, DataChem Laboratories, Inc, Salt Lake City, Utah
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition
