Determination of Lactic Acid (D + L)

Quality controls on tomato and tomato products with CDR FoodLab® width=In Tomatoes products, like tomato juice, tomato sauce,  ketchup and so on, Lactic Acid is produced by the fermentation of lactose mainly through microbial activity. Its concentration depends on the total bacterial count and can be a useful indicator of the good state of preservation. So the determination of the concentration of lactic acid finds a useful indicator of a good state of preservation. Furthermore, the concentration of lactic acid must be within the limits of the law.


  CDR FoodLab tomato, tomato products and vegetable puree analysis systemCDR FOODLAB®
Analyses Lactic Acid (D + L) in tomato
Reducing Sugar
Chloride in tomato and vegetable puree
Simultaneous Sample Analyses 16
Multiple Analyses on a Sample si


Test type: End Point.
Testing time: 5 minutes.
Are possible test sessions with several samples, up to a maximum of 16..

Test Principle

D-lattico and L-lactic acids are oxidized through an enzyme to pyruvic acid with NADH production as a result. The increase of absorbance, measured at 366 nm in end-point, è directly proportional to the concentration di acido lattico nel campione. Il risultato viene espresso in ppM.

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.

The kit *300250 suitable for 100 tests

The kit *300251 suitable for 10 tests

The reagents have a shelf-life of 12 months.

Processing Sample

Vegetable puree and tomato: filter the sample with the suitable filtration kit, before sampling.

Measuring Range

Measuring range
≈ 150-3500 0.01 50 ppm

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

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Tests in few minutes, reference methods compliant.
Easy to use even by unskilled staff

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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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