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Chloride Test Kits

Titrimetric Kits

Range MDL Method Type Kit Refill
20 - 200 ppm 20 ppm Mercuric Nitrate Titrets K-2020 -
50 - 500 ppm 50 ppm Mercuric Nitrate Titrets K-2050 -
250 - 2,500 ppm 250 ppm Mercuric Nitrate Titrets K-2051 -
1,000 - 10,000 ppm 1000 ppm Mercuric Nitrate Titrets K-2055 -
10,000 - 100,000 ppm 10,000 ppm Mercuric Nitrate Titrets K-2070 -

Instrumental Kits

Range Method Type Kit
0 - 40.0 ppm Ferric Thiocyanate Vacu-vials K-2103

CHEMetrics offers test kits employing the well-known Mercuric Nitrate and Ferric Thiocyanate Methods to deliver sensitivity and accuracy within two minutes or less. Based on CHEMetrics patented Self-Filling Reagent Ampoule technology. Premixed. Premeasured. Precise. Each kit contains 30 tests.

The Mercuric Nitrate Method

CHEMetrics employs a mercuric nitrate titrant in acid solution with diphenylcarbazone as the end point indicator. Results are expressed as ppm (mg/l) Cl-.

Contains mercury.  Dispose according to county, national or EU laws.

APHA Standard Methods, 22nded., Method 4500-Cl- C-1997.
ASTM D 512-04, Chloride Ion in Water, Test Method A.
USEPA Methods for Chemical Analysis of Water and Wastes, Method 325.3 (1983).

Technical Data Sheet

The Ferric Thiocyanate Method

The Chloride Vacu-vials® test employs the ferric thiocyanate chemistry. Chloride reacts with mercuric thiocyanate to liberate thiocyanate ion. Ferric ion reacts with thiocyanate ion to produce an orange-brown thiocyanate complex in proportion to the chloride concentration. Results are expressed as ppm (mg/l) Cl-.

Contains mercury.  Dispose according to county, national or EU laws.

APHA Standard Methods, 22nd ed., 4500-Cl-E-1997. D. Zall, D. Fisher, M. Garner, "Photometric Determination of Chlorides in Water", Analytical Chemistry, Vol 28, No. 11, pp. 1665-1668, November 1956.
J. O'Brien, "Automatic Analysis of Chlorides in Sewage,"Wastes Engineering, pp. 670-672, December 1962.

Technical Data Sheet


Chloride is the most common inorganic anion found in water and wastewater. Industrial sources of chloride include agriculture runoff, road salting, wastewater effluent, and industrial wastewater. Testing for chloride is important because this component is corrosive to most metals in systems with elevated pressures and temperatures such as boilers and oil-drilling equipment. In some areas, saltwater intrusion contaminates freshwater aquifers. Elevated levels of chloride in the environment raise concerns about negative ecological impacts on aquatic and terrestrial life. Chloride levels in drinking water are kept relatively low to limit corrosion and adverse taste. The Specified Concentration or Value (SCV) for chloride in drinking water in the UK at the supply point is 250 mg/l (ppm). The SCV for chloride in drinking water in Ireland and the Secondary Maximum Contaminant Level (SMCL) for chloride in drinking water in the US are also 250 mg/l.

What is Chloride?

Chlorides are either chloride (Cl-) ions, or part of a molecule where the chlorine atom is attached with a single covalent bond to another atom. Chlorides can be organic or inorganic. Chlorides can be oxidised but not reduced. Chloride is the most common inorganic anion in water and wastewater, and often found as a component of salts. Common salts are calcium chloride (CaCl2), potassium chloride (KCl), and sodium chloride (NaCl). Natural sources of salt include the ocean and various salt deposits.