Ammonia test in milk
The ammonium ions react with a phenolic derivative and form a blue-green colored complex whose intensity, measured at 700 nm, is directly proportional to the concentration of ammonia in the sample.
Analyzers for determining Ammonia in milk 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: 8 minutes
It is possible to carry out several test sessions with a maximum of 16 samples.
Test priciple
Ione ammonio + der. Fenolico 
blue/green complex
The ammonium ions react with a phenolic derivative and form a blue-green colored complex whose intensity, measured at 700 nm, is directly proportional to the concentration of ammonia in the sample
Calibration curve
Comparative tests, on samples of whole milk, performed between the reference method and the FOODLAB method, made in a leading company of production of milk, have confirmed a very good correlation between the two systems.
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.
Reagent test kit *300050 suitable for 100 tests
Reagent test kit *300054 suitable for 10 tests
The reagents have a shelf-life of 12 months.
Processing – Sample volume – Measuring range
Sample
Use Milk as is
Milk derivatives suitably treated
| Measuring range (ppm di ammonia) | Sample volume | Resolution (ppm di ammoniaca) | Repeatability |
|---|---|---|---|
| 1 – 80 | 50 µL | 0,1 | 3 ppm |
Per campioni con valori di ammoniaca > 80 ppm, utilizzare metà volume di campione (25 uL) e moltiplicare il risultato ottenuto per 2.
