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Reagents for the photometric determination of iron in the range to 1.00 mg / L. TPTZ method.
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Range 0 - 150 ppm | ferrous sulfate method | Resolution 1ppm
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Reagents for HI 755 Checker HC ®, 25 Tests
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Range 0.0 - 30.0 ppm | amino acid method | Resolution 0.1ppm
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Range 0.0 - 8.0 ppm | DPD method | Resolution 0.1ppm
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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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Range 0 - 500 PCU | Platinum Cobalt method | Resolution 5 PCU
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Range 0.00 - 9.99 ppm NH3-N | Nessler Method | 0.01ppm resolution
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Range 0-999 ppb | ASTM Method D1687-92 diphenylcarbonate | Resolution 1 ppb