Nitrate usually a remnant of fertilizer application, maximum allowed in drinking water is 10ppm. D.O. Dissolved Oxygen content. Important for determining the solubility of metals, and for the viability of fish and other organisms. Measured using a hand-held dissolved oxygen meter , or using colorimetry.
Black probe is inserted into sample container for measurement.
Cover opens for insertion of sample container. Sample is transferred to rectangular optical cell for analysis. Using the Turbidimeter Turbidity is a measure of the lack of clarity of the water sample. Turbidimeter controls and display. After Hach Model 2100P Turbidimeter Quick Reference Card, 1997.