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Reagents for HI 739 Checker HC ®, 25 Tests
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Range 0 - 300 ppm in salt water | Colorimetric Method | Resolution 1 ppm
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Range 0:00 to 7:00 g / L | Photometric Method | Resolution 0.01g / L
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Range 0.0 - 99.9 ppm NH3-N | Nessler Method | 0.1ppm resolution
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Range 0:00 to 2:50 ppm | ascorbic acid method | Resolution 0.01ppm
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Range 0 - 20 ppm | ESPA method | Resolution 0.1ppm
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Range 0:00 to 3:00 ppm NH3-N | Nessler Method | 0.01ppm resolution
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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