Determination of L-Lactic acid in Wine

CDR WineLab is the fast, simple and reliable wine analysis system to be used right in the winery with no need of qualified personnel in the field of chemical analysisBy analyzing L-Malic acid and L-Lactic acid, it is possible to assess the correct progress of the malolactic fermentation.

The Analyzers CDR WineLab® for determining L-Lactic Acid in Wine and Must

The system is supplied pre-calibrated and ready for use.
Results are expressed in accordance with the reference method.
It is also possible to standardize the system using samples with a known titration.
The reagents have a shelf-life untill 18 months
The analytical methods are simple: the system does not require an equipped laboratory or skilled staff.

  CDR WineLab wine analyzer CDR WINELAB® CDR WineLab wine analyzer Junior VersionCDR WINELAB®JUNIOR
Analyses Wine and Must:

Alcohol by Volume
Acetic acid (volatile acidity)
Fermentable Sugars
Total Acidity
L-Lactic Acid
L-Malic Acid
Free sulfur dioxide
Total sulfur dioxide
Yeast Assimilable Nitrogen (YAN)
Gluconic Acid
Acetaldehyde (Ethanal)
pH
Total Polyphenols Index
Glycerol
Colour (tonality and intensity)
Total Polyphenols (Folin Ciocalteu)
Total Anthocyanins
Polymerised Anthocyanins
HCl Index
Tannins

Catechins
Copper
Configuration with tailored panel of analyses
Simultaneous Sample Analyses 16 3
Multiple Analyses on a Sample si

Method

Test type: End Point.
Time testing: one test 6 minutes – 50 Test/Hour.
Are possible test sessions with several samples, up to a maximum of 16.

Calibration curve

The calibration curve of CDR WineLab®, obtained using reference methods.

Correlation between the determination of Lactic Acid in Wine with CDR Winelab and Reference Method

Test Principle

L-Lactic acid + NAD+ Analisi-AcidoLattico Pyruvate+ NADH
L-Lactic acid is oxidized in an alkaline environment through an enzymatic reaction and converted into pyruvate, which is turn produces NADH. The increase of absorbance, measured at 366 nm (end-point), is directly proportional to the concentration of L-Lactic acid in the sample.

How to mange malolactic fermantation

Download article: Malolactic fermentation - chemical and biological aspects

  • Why is malolactic fermentation so important?
  • How can the biological and organoleptic stability be enhanced?
  • Which bacteria are responsible for malolactic fermentation?
  • What conditions favour malolactic fermentation?

Follow up on the chemical and biological aspects of malolactic fermentation.
Download the full text of the article.

“Malolactic fermentation – chemical and biological aspects
written by Dr. Simone Bellassai, CDR WineLab® specialist.

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. 300280 : 10 tests 

Code. 300279 : 100 tests (10 packages of 10 tests)

The reagents have a shelf-life of 12 months

Processing sample

Wine: use as is.

Measuring Range

Test Measuring range
(g/L of lactic acid)
Resolution
(g/L of lactic acid)
Repeatability
Lactic acid 0,05 -4,00 g/L 0,01 g/L 0,05 g/L

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.
Find out how it works