Taylor Drop Test Kit, Chloride (Sodium Chloride), 1 drop = 20, 40, 100, 200 or 800 ppm

Description of Tests

Test Code Method/Chemistry Standard/Equivalence or Description Comparator Cell Chloride (Sodium Chloride) Drop Test Argentometric 1 drop = 20, 40, 100, 200, or 800 ppm NaCl NA 9198O

Chloride is one of the major inorganic anions in water and wastewater. High concentrations of chloride may contribute to corrosion of metal pipes and related structures. A key determination for industrial water treaters, chloride is mainly tested to control blowdown in boilers and bleed-off in cooling systems. Chloride tests are also employed to characterize boiler feedwater and to detect leaks in some types of condensers.

Chlorides are determined titrimetrically using either the argentometric or mercuric nitrate method. In the argentometric method, potassium chromate indicates the endpoint by forming red silver chromate with excess silver ions. In the mercuric nitrate method, diphenylcarbazone indicates the endpoint by formation of a purple complex with excess mercuric ions.

Note: Bromide and iodide titrate as equivalent chloride concentrations. Sulfite interferes but can be removed with hydrogen peroxide. High orthophosphate and iron may interfere.