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Čo nového ? |
- Nová verzia programu pre EcaFlow
- Nové elektródy pre Zn, Cd, Pb, Cu
- S2- (sulfidy) v odpadových vodách
- Cr(VI) vo vodách
- SO2 vo vínach a pivách
- Bromičnany vo vodách
- Amoniak v odpadových vodách
- Zlato v geologických materiáloch
- Arzén vo vodách
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Acidity in wine |
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Acidity significantly influences the properties of wine. A simple coulometric method has been developed by ISTRAN enabling the fast measurement of acid content in wine samples diluted with sodium sulphate electrolyte.
The unique features of the patented measuring cell from ISTRAN eliminates the need of a separate indication system and stirring of the solution required in common coulometric titration systems. Hence, the procedure done on EcaFlow laboratory analyser is extremely simple: the sample is pumped to the cell and titrated coulometrically by constant current. The results are expressed graphically and numerically as tartrate acid in g/L units. The calibration is done with standard solutions of tartric acid. The system also enables the so called calibrationless measurement by making use of the Faraday's laws of electrolysis. Here, the acid content is calculated directly from the duration of the coulometric titration. |
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