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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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Range 0-999 ppb | ASTM Method D1687-92 diphenylcarbonate | Resolution 1 ppb
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The HI 775 Checker®HC is a simple, accurate, and cost effective way to measure alkalinity. Designed as a more accurate alternative to chemical test kits, the HI 775 provides quick, accurate results in four easy steps.
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Range 0:00 to 3:00 ppm NH3-N | Nessler Method | 0.01ppm 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.
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Range 0.0 - 99.9 ppm NH3-N | Nessler Method | 0.1ppm resolution
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Range 0 - 600 ppb NO2-N | EPA method 354.1 | Resolution 1 ppb
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Range 0:00 to 5:00 ppm | EPA Method 315 B | 0.01ppm resolution
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Range 0:00 to 2:00 ppm | EPA method 340.1 | 0.01ppm resolution