12108659 |
Thomas DH, Rohrer JS, Jackson PE, Pak T, Scott JN: Determination of hexavalent chromium at the level of the California Public Health Goal by ion chromatography. J Chromatogr A. 2002 May 17;956(1-2):255-9.
The modified method, which uses IonPac NG1 and AS7 guard and analytical columns, an eluent of 250 mM ammonium sulfate-100 mM ammonium hydroxide operated at 1.0 ml/min, a 1000 microl injection volume, and postcolumn reaction with 2 mM diphenylcarbazide-10% methanol-0.5 M sulfuric acid (using a 750 microl reaction coil) followed by UV-Vis detection at 530 nm, permits a method detection limit for chromate of 0.02 microg/l. |
31(0,1,1,1) |
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