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Chloride |
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 Methods
Chloride is the most common inorganic anion found in water and wastewater. The Maximum Secondary Contaminant Level for drinking water for chloride is 250 mg/L. Natural sources of salt are the ocean and various salt deposits above and below ground.
Chloride is very corrosive to most metals in systems with elevated pressures and temperatures such as boilers and oil-drilling equipment.
The Silver Nitrate Method
References: ASTM D 512-89 (1999), Chloride Ion in Water, Test Method B. APHA Standard Methods 20th ed., pp. 4-67, Method 4500-Cl¯ B (1995).
In the Argentometric method, potassium chromate is used to indicate the end point of the silver nitrate titration of chloride. Red silver chromate is precipitated before silver chloride is formed.
The Mercuric Nitrate Method
References: APHA Standard Methods, 20th ed., pp. 4-68, Method 4500-Cl¯ C (1998). ASTM D 512-89 (1999), Chloride Ion in Water, Test Method A. USEPA Methods for Chemical Analysis of Water and Wastes, Method 325.3 (1983).
CHEMetrics employs a mercuric nitrate titrant in acid solution with diphenylcarbazone as the end point indicator. Results are expressed as ppm (mg/L) Cl¯.
The Ferric Thiocyanate Method
Reference: APHA Standard Methods, 20th ed., pp. 4-70, 4500-Cl-E (1998). 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.
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 orangebrown thiocyanate complex in proportion to the chloride concentration. Results are expressed as ppm (mg/L) Cl¯. |
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| • Click to View MSDS and Kit instructions |
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 Visual Kits |
2-20 ppm
2.0 ppm / Method: Mercuric Nitrate |
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Cat# |
| Titrets Kit, Shelf-life 6 months |
K-2002 |
| | Increments:
2.0, 2.2, 2.4, 2.6, 2.8, 3.0, 3.2, 3.6, 4.0, 5.0, 6.0, 7.0, 8.0, 10, 14, 20 ppm | |
| | Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules with valve assemblies, Acidifier Solution, Normalizer Solution, titrettor, 25 ml sample cup, instructions, and MSDS. | |
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20-200 ppm
20 ppm / Method: Mercuric Nitrate |
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Cat# |
| Titrets Kit |
K-2020 |
| | Increments:
20, 22, 24, 26, 28, 30, 32, 36, 40, 50, 60, 70, 80, 100, 140, 200 ppm | |
| | Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules with valve assemblies, Activator Solution, titrettor, 25 ml sample cup, instructions, and MSDS. | |
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50-500 ppm
50 ppm / Method: Mercuric Nitrate |
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Cat# |
| Titrets Kit |
K-2050 |
| | Increments:
50, 55, 60, 65, 70, 75, 80, 90, 100, 125, 150, 175, 200, 250, 350, 500 ppm | |
| | Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules with valve assemblies, Activator Solution, titrettor, 25 ml sample cup, instructions, and MSDS. | |
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250-2500 ppm
250 ppm / Method: Mercuric Nitrate |
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Cat# |
| Titrets Kit |
K-2051 |
| | Increments:
250, 275, 300, 325, 350, 375, 400, 450, 500, 625, 750, 875, 1000, 1250, 1750, 2500 ppm | |
| | Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules with valve assemblies, Activator Solution, titrettor, 25 ml sample cup, instructions, and MSDS. | |
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1000-10,000 ppm
1000 ppm / Method: Mercuric Nitrate |
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Cat# |
| Titrets Kit |
K-2055 |
| | Increments:
1000, 1100, 1200, 1300, 1400, 1500, 1600, 1800, 2000, 2500, 3000, 3500, 4000, 5000, 7000, 10,000 ppm | |
| | Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules with valve assemblies, Activator Solution, titrettor, 25 ml sample cup, instructions, and MSDS. | |
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10,000-100,000 ppm
10,000 ppm / Method: Mercuric Nitrate |
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Cat# |
| Titrets Kit |
K-2070 |
| | Increments:
10,000, 11,000, 12,000, 13,000, 14,000, 15,000, 16,000, 18,000, 20,000, 25,000, 30,000, 35,000, 40,000, 50,000, 70,000, 100,000 ppm | |
| | Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules with valve assemblies, Activator Solution, titrettor, 25 ml sample cup, instructions, and MSDS. | |
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 Instrumental Kits |
2.5-40.0 ppm
Ferric Thiocyanate |
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Cat# |
| Vacu-vials Kit |
K-2103 |
| | Kit comes in a cardboard box and contains everything needed to perform up to 29 tests (except distilled water): thirty ampoules, Activator Solution, 25 ml sample cup, ampoule blank,1.0 mL syringe, instructions, calibration table, and MSDS. | |
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Kit Components common to Chloride |
| Description |
Cat# |
| | Sample Cup Pack, 25 mL (6 ea) | A-0013 |
| | Ampoule Blank Pack (5 ea) | A-0023 |
| | Syringe Pack, 1.0 mL (6 ea) | A-0027 |
| | Titrettor Pack (1 ea) | A-0053 |
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