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Titrets Sulfite Kits

Sulfite concentrations in boiler and process waters must be monitored routinely to avoid over treatment. Waste treatment plants that use sulfur dioxide to remove excess chlorine must monitor their effluents for sulfite. CHEMetrics' sulfite test kits employ the iodometric chemistry in which sulfite is titrated with iodide-iodate titrant in an acid solution using a starch indicator. Thiosulfate will titrate as sulfite. Results are expressed as ppm (mg/L).

Titrets Sulfite Kits

Sulfite is not usually present in surface waters. If sulfite is discharged in effluents or from domestic wastewaters, it readily oxidises to form sulfate. Sodium sulfite is the most common form of sulfite and is an excellent reducing agent with applications as an oxygen scavenger.

Sulfites have been used for centuries to sanitise and preserve foods. They are used worldwide in the wine industry as antioxidant and antimicrobial agents. However, sulfites have been identified as causative agents in certain allergic reactions suffered by asthmatics.

CHEMetrics' sulfite test kit is based on the Ripper method, which the wine industry has used for years as a standard for rapid sulfite analysis. Sulfite is titrated with an iodide-iodate solution, using a starch end point indicator. Phosphoric acid is used to adjust the pH of the sample. Results are quantified using direct-reading titration cells. The test determines free sulfite as ppm (mg/L).

Results for this test kit are acceptable for dry white wines (although they can have an error of up to 10 ppm). This test kit is not recommended for use with red wines or white wines containing ascorbic acid or tannin. These wines often give false high test results.

Titrets Method
Titrets ampoules use reverse titration to quantify concentrations. After snapping the ampoule tip, the sample is drawn into the ampoule in small doses (with the Titrettor device included in each kit that precisely controls the sample) (Step 1), until a color change signals that the equivalence point has been reached (Step 2). The titration is stopped at the end point and the ampoule is held upright. The liquid level will correspond to a printed scale on the ampoule's outer surface (Step 3).

Kits include 30 ampoules with valve assemblies, a titrettor, accessory solution(s) (when necessary), a sample cup, and instructions. Material Safety Data Sheets are provided in test kits.

Each Titret ampoule is 13 mm in diameter designed for titrimetric analysis. The ampoule contains vacuum-sealed liquid titrant and has a flexible valve assembly attached.

Ordering Information:

K-9602
Range: 2-20 ppm as SO3
MDL: 2.0 ppm / Method: Iodometric
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, Neutraliser Solution, titrettor, 25 mL sample cup, instructions, and MSDS.

K-9605
Range: 5-50 ppm as SO3
MDL: 5.0 ppm / Method: Iodometric
Increments: 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 9.0, 10.0, 12.5, 15.0, 17.5, 20.0, 25.0, 35.0, 50.0 ppm
Kit comes ina cardboard box and contains everything needed to perform 30 tests: thirty ampoules with valve assemblies, Neutraliser Solution, titrettor, 25 mL sample cup, instructions, and MSDS.

K-9610
Range: 10-100 ppm as SO3
MDL: 10 ppm / Method: Iodometric
Increments: 10, 11, 12, 13, 14, 15, 16, 18, 20, 25, 30, 35, 40, 50, 70, 100 ppm
Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules with valve assemblies, Neutraliser Solution, titrettor, 25 mL sample cup, instructions, and MSDS.

K-9650
Range: 50-500 ppm as SO3
MDL: 50 ppm / Method: Iodometric
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, Neutraliser Solution, titrettor, 25 mL sample cup, instructions, and MSDS.

K-9610W
Range: 10-100 ppm as SO2
MDL: 10 ppm / Method: Ripper
Increments: 10, 11, 12, 13, 14, 15, 16, 18, 20, 25, 30, 35, 40, 50, 70, 100 ppm
Kit comes in a cardboard box and contains everything needed to perform 10 tests: ten ampoules, ten valve assemblies, instructions, and MSDS.