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Reagent for the photometric determination of chromium VI in the range up to 1000 micrograms / L. Diphenylcarbohydrazid method.
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The HI 761 uses an adaptation of the USEPA method 330.5. The reaction between the chlorine and DPD reagent causes a pink tint in the sample.
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Reagents for HI 755 Checker HC ®, 25 Tests
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