Hydrogen peroxide test in milk
Hydrogen peroxide is used as a sanitizing of milk handling equipment. The presence of hydrogen peroxide can contaminate the milk. The purpose of the test is to detect any traces inside the product. This test also allows to check the possible addition of hydrogen peroxide in raw milk, before pasteurization, to increase its shelf-life.
Analyzers for determining Hydrogen peroxide and dairy products
 CDR FOODLAB® |
 CDR FOODLAB® JUNIOR |
|
|---|---|---|
| Analyses | e-Fructosyl Lisine L-Lactic Acid Ammonia Chloride Alkaline phosphatase (ALP) Peroxidase Hydrogen peroxide Milk Urea Nitrogen (MUN) Lactose Peroxide value (PV) Free Fatty Acids (FFA) |
Configuration with tailored panel of analyses |
| Simultaneous Sample Analyses | 16 | 3 |
| Multiple Analyses on a Sample |  |
– |
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.
Method
Test type: End Point.
Testing time: one test 6 minutes
Are possible test sessions with several samples, up to a maximum of 16.
The system is supplied pre-calibrated and ready for use.
Principle of the test
H2O2 + phenolic derivate 
Pink complex
Hydrogen peroxide reacts with a phenolic derivate and peroxidase, and forms a pink colored complex whose intensity measured at 505 nm, is directly proportional to the concentration of hydrogen peroxide (H2O2) in the sample. (H2O2)
Correlation Data
Comparative tests on samples of fresh milk, where H2O2 standard solution was added, confirmed a very good alignment between CDR Foodlab method and 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 *300325 suitable for 100 tests
Code *300329 suitable for 10 tests
The reagents have a shelf-life of 12 months.
Processing – Sample volume – Measuring range
Whole or skimmed milk: use as is.
| Measuring range (ppM H2O2) |
Sample volume | Resolution (ppM H2O2) |
Repeatability |
|---|---|---|---|
| 2 – 25 | 50 µL | 0,1 | CV<3% |
For samples with a value of H2O2 that exceed the measuring range use half of the sample volume and multiply the result by 2.
