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Reagent for the photometric determination of chlorine dioxide in the field until 2:00 mg / L. Chlorophenol Red method.
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The HI 771 Checker®HC is a simple, accurate, and cost effective way to measure ultra-high ranges of chlorine. Designed as a more accurate alternative to chemical test kits, the HI 771 provides quick, accurate results in four easy steps.
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Range 0-999 ppb | ASTM Method D1687-92 diphenylcarbonate | Resolution 1 ppb
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Range 0.0 - 15 ppm | Molybdenum Blue Method | 0.1ppm resolution
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Reagents for HI 755 Checker HC ®, 25 Tests
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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 0.0 - 99.9 ppm NH3-N | Nessler Method | 0.1ppm resolution
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Range: 0 to 300 ppb. The HI 749 Checker®HC is a simple, accurate, and cost effective way to measure low ranges of chromium VI in fresh water. Designed as a more accurate alternative to chemical test kits, the HI 749 provides quick, accurate results in four easy steps. The HI 749 uses an adaptation of the ASTM Manual of Water and Environmental Technology, D1687-92, Diphenylcarbohydrazide method. The reaction between chromium VI and the reagent causes a purple tint in the sample.