MilliporeSigma
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1.11174

Supelco

Chlorine and pH Test

colorimetric, 0.1-1.5 mg/L (Cl2), pH range 6.8-7.8, for use with MQUANT®

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Select a Size

specific analyte(s)

chlorine

Quality Level

measuring range

0.1-1.5 mg/L (Cl2)

pH range

6.8-7.8

compatibility

for use with MQUANT®

detection method

colorimetric

storage temp.

15-25°C

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This Item
1.148261.111321.14670
Supelco

Supelco

1.11174

Chlorine and pH Test

Chlorine Test colorimetric, 0.25-15 mg/L (Cl2), for use with MCOLORTEST®

Supelco

1.14826

Chlorine Test

Chloride Test titrimetric, for use with MCOLORTEST®

Supelco

1.11132

Chloride Test

detection method

colorimetric

detection method

colorimetric

detection method

titrimetric

detection method

colorimetric

measuring range

0.1-1.5 mg/L (Cl2)

measuring range

0.25-15 mg/L (Cl2)

measuring range

-

measuring range

0.10-2.0 mg/L (Cl2)

pH range

6.8-7.8

pH range

-

pH range

-

pH range

-

microbialanalysis
microbialanalysis

microbialanalysis
microbialanalysis

microbialanalysis
microbialanalysis

microbialanalysis
microbialanalysis

compatibility

for use with MQUANT®

compatibility

for use with MCOLORTEST®

compatibility

for use with MCOLORTEST®

compatibility

for use with MQUANT®

General description

(free chlorine, total chlorine, and pH) Method: colorimetric with color-matching vessel 0.1 - 0.3 - 0.6 - 1.0 - 1.5 mg/l Cl₂ pH: 6.8 - 7.1 - 7.4 - 7.6 - 7.8 MQuant®
Chlorine containing disinfectants are most widely used. They are applied particularly to disinfect drinking water and swimming pool water. This MQuant® Chlorine and pH test (formally MColortest®) measures chlorine and pH and evaluates the color reactions based on the transmitted light method. So even turbid and colored water samples can be analyzed without further preparation. The color matching vessel is made of very durable, lightfast plastic, thus suitable for industrial areas and wet environments.
Using the refill packs 1.11143 and 1.11157, the original test kit can be used for a very long time, making it a particularly economical and ecological system.

Method
In weakly acidic solution free chlorine reacts with diethyl-p-phenylenediamine (DPD) to form a red-violet dye. Combined chlorine reacts only after the addition of iodide ions. This permits free chlorine to be distinguished from combined chlorine.
The pH determination takes place by means of chlorine-resistant phenol red indicator solution, which changes color from yellow to red-violet in the pH range of 6.5 8.2.

This test is not suited for seawater.
Water in public and private swimming pools must be disinfecting to kill bacteria and viruses. Chlorine-containing preparations or even chlorine gas itself are usually used for this purpose. To check the content of chlorine and the pH value is essential.

Legal Information

MCOLORTEST is a registered trademark of Merck KGaA, Darmstadt, Germany
MQUANT is a registered trademark of Merck KGaA, Darmstadt, Germany

Pictograms

CorrosionHealth hazard

Signal Word

Danger

Hazard Statements

Hazard Classifications

Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1A - STOT RE 2 Oral

Target Organs

Thyroid

Storage Class Code

8A - Combustible, corrosive hazardous materials

WGK

WGK 2


Certificates of Analysis (COA)

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Protocols

Analytical Method: Analytical Quality Assurance, Standard for Total Chlorine

Preparation of a standard solution for total chlorine

Analytical Method: Analytical Quality Assurance, Standard for Free Chlorine (dichloroisocyanuric acid)

AQA Standard for free chlorine - Preparation of a standard solution for free chlorine

How to Prepare a Standard for Free Chlorine Analysis

AQA Standard for free chlorine - Preparation of a standard solution for free chlorine - Preparation of a stock solution of free chlorine: First prepare a 1:10 dilution using a sodium hypochlorite solution containing approximately 6 - 14 % of active chlorine. For this pipette 10 ml of sodium hypochlorite solution into a calibrated or conformity-checked 100-ml volumetric flask and then make up to the mark with water for analysis.

Analytical Method: Analytical Quality Assurance, Standard for Free Chlorine (DIN)

Preparation of a standard solution for free Chlorine according to DIN EN ISO 7393

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