Colorimetric analysis for calcium determination
- Kit volume: 80 ml
- Method: Two-reagent differential at 635 nm
- Limit of linearity: 180 ml/l
- Limit of detection: 2.0 mg/l (ppm)
Advantages
- Stable two-reagent liquid until the expiration date
- Ready-to-use dedicated reagent
- Liquid calibrator included in the kit
Calcium is present in wine at concentrations of 6 to 165 mg/L. Instability due to calcium tartrate appears at 4 to 7 months of fermentation.
Calcium in the sample reacts with 2,7-[bis(2-arsonophe- nylazo)]-1,8-dihydroxynaphthalene-3,6-disulfonic acid (Ar- senazo III). The color increase is directly proportional to the calcium concentration of the sample.
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