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Reagents for the photometric determination of calcium. Oxalate 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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Range 0-999 ppb | ASTM Method D1687-92 diphenylcarbonate | Resolution 1 ppb
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Range 0:00 to 3:50 ppm | USEPA Method 330.5 / DPD | Resolution 0.01ppm
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Range 0 - 20 ppm | ESPA method | Resolution 0.1ppm
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Range 0 - 200 ppb | ascorbic acid method | Resolution 1 ppb
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Range 0.0 - 12.5 ppm | DPD Method | Resolution 0.1ppm
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Range 0.0 - 30.0 ppm | amino acid method | Resolution 0.1ppm
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Reagents for HI 755 Checker HC ®, 25 Tests