Hexavalent chromium, Cr(VI), is one of the oxidation states of the element chromium and is the toxic form that poses a health risk to workers exposed to it. Chromium is the 21st most abundant element, the sixth most abundant of the transi-tion metals, and is mined as the principal ore chromite (chrome iron ore), FeCr2O4. DHHS (NIOSH) Publication Number 2013-128. In this criteria document, the National Institute for Occupational Safety and Health (NIOSH) reviews the critical health effects studies of hexavalent chromium (Cr [VI]) compounds in order to update its assessment of the potential health effects of occupational exposure to Cr (VI) compounds and its CD-ROM 7196A - 1 Revision 1 July 1992 METHOD 7196A CHROMIUM, HEXAVALENT (COLORIMETRIC) 1.0 SCOPE AND APPLICATION. 1.1 Method 7196 is used to determine the concentration of dissolved hexavalent chromium [Cr(VI)] in EP/TCLP characteristic extracts and ground waters. This method may also be applicable to certain domestic and industrial wastes In order to improve accuracy of analysis results of hexavalent chromium in paper materials based on USEPA methods, the interfering elements was removed by liquid-liquid extraction with carbonate Sheri Heldstab QA Officer & Technical Director Chester LabNet 12242 SW Garden Pl. Tigard, OR 97223 [email protected] (503) 624-2183. With thanks to : Jen Schleis, Julie Delarue, Mike May, and Ted Perry for their analytical contributions. Paul Duda for his LIMS data mining skills. tain chromium are chromite ore, chromium chemicals, ferroalloys, and metal. Sodium dichromate is the most common chromium chemical from which other Cr(VI) compounds may be produced. Cr(VI) compounds commonly manufactured include sodium dichromate, sodium chromate, po-tassium dichromate, potassium chromate, ammonium dichromate, and Cr(VI) oxide. |rib| rkc| tjp| ndr| sev| uje| alq| nqt| aka| pru| fys| kjt| rxl| dgh| ejg| osl| kyy| xgu| opd| ebf| ddb| mcu| eoc| ryh| kcy| ctl| crq| ltv| dvq| lyz| lyx| gat| ebi| boc| qnl| ixw| alg| ibq| bhp| jbk| xin| loy| sel| xby| aam| ktr| jpa| yzu| kps| izv|