CHROMIUM, HEXAVALENT 7600
MEASUREMENT: 9. Set wavelength on the spectrophotometer to 540 nm. 10. Set to zero using a 0.5 N H 2SO 4 reagent blank. 11. Transfer sample solution to a cuvette and record the absorbance. NOTE 1: A sample containing 1.5 µg Cr(VI)/25 mL gives ca. 0.2 absorbance. NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
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