Milk and dairy products

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 also allows to quantify the concentration of salt in products such as cheese, vegetable purees, sauces and liquid of processing and storage of dairy products in order to verify the quality of the product and discover adulterations.

Chloride test in milk, cheese and water solution

CDR FoodLab® is the chemical analyzer for quality and process control that allows you to determine a wide range of parameters of many foods, animal feeds and pet foods. 

Endpoint analysis. Analysis time: [uni] . Analysis sessions with multiple samples are possible up to a maximum of 16 tests for CDR FoodLab® and 3 tests for CDR FoodLab® Junior.&nbsp;<h3>Sample treatment</h3>Milk: use milk as is. Water solution: use water solution as is. Brine: dilute 1 mL of brine with 9 ml of water. Use the “Chloride in water” curve and multiply the result by 10. Cheese, sauce: weigh exactly 4 gr cheese/cottage cheese/sauce and add 40 mL of a solution of NaOH 0.25N. Homogenize the sample (at room temperature with a homogenizer, or at 40-50°C using a stick).

Method

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.

Test principle

Reaction involved in the analysis of chlorides in milk and dairy products

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.

Calibration curve

Chloride Test in milk: CDR FoodLab® method vs reference method calibration curve. R²=0.9948

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Measuring range

CDR FoodLab® the analyzer for quality control of food, animal feeds and pet foods. Top version

CDR FoodLab®

CDR FoodLab® the analyzer for quality control of food, animal feeds and pet foods. Junior version

CDR FoodLab® Jr

Analyzers for quality control of milk and dairy products

Chloride

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