Page:NIOSH Manual of Analytical Methods - 7703.pdf/5

 CHROMIUM, HEXAVALENT by portable VIS: METHOD 7703, Issue 1, dated 15 March 2003 - page 5 of 5 EVALUATION OF METHOD: This method was evaluated in the laboratory with spiked filters [3-5] and a certified reference material containing a known loading of C r(V I) [4]. This certifie d re ference m ate rial (CRM) is European Comm ission, Institute for R eferenc e M aterials and Me asu rem ents (EC /IRM M) CR M 5 45, Cr(VI) and Cr(total) in welding dust loaded on a glass fibe r filter [12]. T he m eth od has also been evaluate d in the field, where samples collected during aircraft maintenance operations were analyzed on-site [3, 4]. The accuracy was estimated using the proto col sum m arized in a NIOS H techn ical rep ort [13]. Alternative filter types can also b e us ed, e.g., PTFE, binder-free glass fiber filters, or quartz fiber filters. Filter m ate rials should be tested be fore use to ensure Cr[VI] sta bility. Filters can be pretreated with ba se to m inim ize Cr[VI] red uction during sa m pling in high-iron or ac idic environm ents [6].

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NIOSH [1994] Chromium, Hexavalent: Method 7600. Eller PM, Cassinelli ME, eds. NIOSH Manual of Analytical M etho ds (N MA M), 4 thed. Cincinnati, OH: National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 94-113. NIOSH [1994] Chromium, Hexavalent: Method 7604. Eller PM, Cassinelli ME, eds. NIOSH Manual of Analytical M etho ds (N MA M), 4 thed. Cincinnati, OH: National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 94-113. Marlow D, W ang J, Wise T J, Ashley K [2000]. Field Test of a Portable Method for the Determination of Hex avalent Chrom ium in W orkplace A ir. Am. Lab. 32 (15): 26-28. W ang J, Ashley K, Marlow D, England E C, and Carlton, G. [1999]. Field Method for the Determination of Hexavalent Chromium by Ultrasonication and Strong Anion Exchange Solid Phase Extraction. Anal. Chem. 71: 1027-1032. W ang J, As hley K, K ennedy E R, Ne um eister C [1997]. Dete rm ination of H exavalent C hrom ium in Industrial Hygiene Sam ples Using Ultrasonic Extraction and Flow Injection Analysis. Analyst 122: 1307-1312. Foster, R D, Howe A M, Cottrell S J, and Northage C [1996]. An Investigation of the Exposure of W orkers to Hexavalent Chromium in the Air of Chrome Plating Works (Project Report). Health and Safety Laboratory, Health and Safety Executive: Sheffield, England. Molina D, and Abell M T [1987]. An Ion Chromatographic Method for Insoluble Chromium in Paint Ae rosol. Am. Ind. Hyg. Assoc. J. 48: 830-835. Ndung’u K, Djane, N.-K, Malcus F, and Mathiasson L [1999]. Ultrasonic Extraction of Hexavalent Chromium in Solid Samples Followed by Automated Analysis Using a Combination of Supported Liquid Mem brane Extraction and UV Detection in a Flow System. Analyst 124: 1367-1372. Health and Safety Laboratory [1998]. Methods for the Determination of Hazardous Substances, MDHS M eth od No. 61.Tota l He xavalent Chrom ium Co m pounds in Air. Health and Safety Laboratory, Health and Safety Executive: Sheffield, England. Hayes R B [1982]. Biological and Environmental Aspects of Chromium. Elsevier: Am sterdam. Sk oog D A, W est D M, and H oller F J [1988]. Funda m enta ls of A nalytical C hem istry, 5 th ed. Saunders: Philadelphia. Co m m ission of the Europe an C om m unities, Institute for R eferenc e M aterials and Me asu rem ents. Ce rtificate o f Analysis, C RM 545 : Cr(V I) and total leac hab le Cr in welding du st load ed o n a filter. EC/IRM M: Bruss els (1997). Kenne dy E R, Fischbac h T J, So ng R, Eller P M, and S hulm an S A [199 5]. Guidelines for Air Sam pling and Analytical Method Development and Evaluation (DHHS [NIOSH] Publication No. 95117). National Institute for Occupational Safety and Health: Cincinnati, OH.

METHOD WRITTEN BY: Kevin As hley, Ph .D., N IOS H/D AR T; Jin W ang, Ph.D ., NIO SH /HE LD ; David M arlow , NIO SH /DA RT ; James Boiano, CIH, NIOSH/DSHEFS.

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition