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Silica Low Range Calibration Standard Set
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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 0:00 to 2:50 ppm | USEPA Method 330.5 / DPD | Resolution 0.01ppm
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Range 0 - 500 PCU | Platinum Cobalt method | Resolution 5 PCU
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Range 0:00 to 2:00 ppm | EPA method 340.1 | 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 0:00 to 5:00 ppm | EPA Method 315 B | 0.01ppm resolution
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Range 0.0 - 12.5 ppm | DPD Method | Resolution 0.1ppm