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
AnalysesFermentable Sugars
Total Acidity
Acetic Acid
L-Lactic Acid
L-Malic Acid
Malolactic Fermentation
Alcohol
Free sulfur dioxide (Free SO2)
Total sulfur dioxide (Total SO2)
pH
Yeast assimilable nitrogen (YAN)
Gluconic Acid
Glycerol
Polyphenols
TPI – Total Polyphenols Index
Acetaldehyde (Ethanal)
Anthocyanins
Catechins
Colour intensity and tonality
Copper
Configuration with tailored panel of analyses
Simultaneous Sample Analyses163
Multiple Analyses on a Samplesi

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.

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 Volume – Measuring Range

Wine: use as is.

TestMeasuring range
(g/L of lactic acid)
Sample volumeResolution
(g/L of lactic acid)
Repeatability
Lactic acid0,05 -4,0020 µL0,010,05 g/L

Reagent developed by CDR S.r.l - ISO 9001 certified company

Click and Discover more about CDR WineLab®: analysis system fast, simple to use and reliable for determining multiple parameters in wine and must

L-Lactic Acid was last modified: June 30th, 2017 by CDR s.r.l.