Determination of L-Malic Acid in Soft Drinks
Measuring malic acid in soft drinks is essential to control product quality, taste, and compliance.
Method
Test type: End Point.
Testing time: 4 minutes.
Analysis sessions with multiple samples are possible up to a maximum of 16 tests for CDR DrinkLab.
Sample treatment
Degas using the ultrasonic bath (code 222062) before taking the sample.
Principle of the test
L-malic acid is oxidized in an alkaline environment through an enzymatic reaction and converted to oxaloacetic acid, which in turn produces NADH. The increase in absorbance, measured at 366 nm (end-point), is directly proportional to the concentration of L-malic acid in the sample.
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Calibration curve
The calibration curve of the CDR DrinkLab system, carried out using HPLC as a reference method, confirmed excellent linearity of the system throughout the measurement range.
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Reagent test Kits
Measuring range
| Analyses | Measuring range | Resolution | Repeatability |
|---|---|---|---|
| L-Malic acid [0.05-5] g/L | 0.05 - 5 g/L | 0.01 g/L | 0.08 g/L |
The perfect system for you
CDR DrinkLab
Complete analysis panel, supplied already configured
Up to 16 determinations simultaneously
Possibility of carrying out analyses of the same sample
Integrated printer
Full connections (LAN - USB - Bluetooth barcode/QR code reader)