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Even though zinc is nontoxic to humans, concentrations higher than 5 mg/L (ppm) can cause a bitter, astringent taste.
This level of zinc can result in a milky color in alkaline water and is an irritant to the human digestion system. Zinc in low quantities is a beneficial and necessary element for body growth.
Zinc is normally introduced into drinking water through industrial effluents. In addition to drinking water, zinc is measured in surface finishing, boilers and cooling towers, water conditioning and effluent waters.
- Method: Colorimetric
- Range: 0.0-4.0 mg/L; 0.0-20.0 mg/L
- Smallest Increment: 0.1 mg/L; 0.4 mg/L
- Chemical Method: Zincon
- Number of Tests: 100
- Weight: 647 g
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