Chloride test in milk, cheese and aqueous solution

The chemical analysis of the milk and dairy products for quality control for every stage of the production chain with CDR FoodLab®The chloride test allows to identify any added salt water in the milk, a sophistication that the normal cryoscopic examination does not detect. This analysis allows to quantify the concentration of salt in products such as cheese, vegetable purees and sauces, and liquid of processing and storage of dairy products.

Analyzers for determining Chloride in milk and dairy products


  CDR FoodLab for performing a range of tests in milk and a variety of dairy products CDR FOODLAB® CDR FoodLab Junior for performing a range of tests in milk and a variety of dairy products CDR FOODLAB® JUNIOR
Analyses Milk and Dairy Products:
L-Lactic acid
Milk Urea Nitrogen (MUN)
Alkaline phosphatase (ALP)
Hydrogen peroxide
ε-fructosyl-lisine (Furosine)
Configuration with tailored panel of analyses
Simultaneous Sample Analyses 16 3
Multiple Analyses on a Sample si

It is not necessary skilled staff nor a laboratory for the analysis.
Results are correlated with reference method results.
It is free of service and maintenance cost.
With the same analyzers you can also perform analysis of egg, tomato, vegetable purees, cheeses and fats.


Test type: End Point
Time of test: 3 minutes
It is possible to carry out several test sessions with a maximum of 16 samples.

Test principle

Cl + Hg(SCN)2 + Fe3+freccia Orange colored complex

Chloride ions react with mercuric thiocyanate and form thiocyanate ions. The thiocyanate ions react with the Fe (III), giving an orange-colored complex whose intensity, measured at 505 nm, is directly proportional to the concentration of chlorides in the sample.

Calibration curve

Comparative tests, on samples of whole milk performed between the reference method and the CDR FoodLab® method, made in a leading milk production company, have confirmed a very good alignment between the two systems.

Chloride Test in milk: CDR FoodLab method vs reference method

Reagent test Kits

The reagents are packaged in foil pouches containing 10 tubes useful to perform 10 analyses.

This is the minimum package that allows the use of CDR systems even to those who need to make a few analyses, thus not wasting reagents.

There are also boxes of 100 tests, however, packaged in 10 bags of 10 tubes containing the reagent.

Code *300025: 100 tests

Code *300028: 10 tests

The reagents have a shelf-life of 12 months

Code *300100: 100 tests

Code *300104: 10 tests

Code *300200: 100 tests

Code *300204: 10 tests

The reagents have a shelf-life of 12 months

For vegetable puree the code is:

Code *300200: 100 tests

Code *300204: 10 tests

The reagents have a shelf-life of 12 months

Processing Sample 

Use milk as is.
Water solution as is
Cheese, Sauce: homogenized samples in diluted soda solution.

Measuring range

Test Measuring Range Resolution Repeatability
Chlorides - water 0.01 - 5 g/dL NaCl 0.01 g/dL NaCl 0.07 g/dL NaCl
Chlorides - whole milk 50 - 400 mg/dL NaCl 1 mg/dL NaCl 12 mg/dL NaCl
Chlorides - skimmed milk 50 - 400 mg/dL NaCl 1 mg/dL NaCl 12 mg/dL NaCl
Chlorides - cheese 0.2 - 7 g% NaCl 0.01 g% NaCl 0.07 g% NaCl
Chlorides - cottage cheese 0.02 - 5.2 g% NaCl 0.01 g% NaCl 0.04 g% NaCl
Chlorides - sauces 0.2 - 7 g% NaCl 0.01 g% NaCl 0.22 g% NaCl

For samples with a value of Chloride that exceed the measuring range use half of the sample volume and multiply the result by 2.

Reagents developed by CDR S.r.l - Quality System Certified ISO 9001 Ed. 2015 - Certificate n. 9115

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With the CDR system, you can perform your tests in total autonomy

Neither skilled staff nor a dedicated external laboratory is needed to use our systems. CDR FoodLab® optimizes traditional testing methods, making them faster and easier, while guaranteeing accuracy standards in line with the reference methods.

Analytical kit

CDR FoodLab® Analysis Systems use disposable pre-vialed reagents specifically developed by the research laboratories of CDR. The use of pre-vialed reagents and the analytical procedures allow:

  • a sample preparation that is quick and easy, when needed at all;
  • making analytical procedures extremely fast and easy;
  • removing all needs for complex calibration procedures.

Reagents come in aluminum packages containing 10 test tubes each to perform 10 tests (or packages for 100 tests containing 10 single packages of 10 test tubes each).

Just a few steps and results are yielded right away

Just a few steps will suffice to carry out your analysis in a rapid way in total autonomy. The system is composed of both the analyzer based on photometric technology and a kit of low toxicity, pre-vialed reagents, developed by CDR.

CDR FoodLab® is cost-effective because it does not require the use of expensive equipment and does not entail maintenance, assistance or calibration costs.
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