Heavy metals in wine: easy and accurate method.
Quantitative determination of metals that can be precipitated by potassium hexacyanoferrate(II) in wine («décassage» of wine)
Heavy metals in wine
Wine sometimes contains heavy metals which can be precipitated out by the addition of potassium ferrocyanide.
Generally, these are quantities of iron ranging between 1 and 5 mg, and exceptionally up to 9 mg Fe/L. Zinc, copper, and lead – in descending order of content – may also be present.
To estimate the quantity of potassium ferrocyanide necessary for the «décassage» of the wine, only very complicated and relatively inaccurate methods have been described until now.
This Metrohm bulletin permits accurate results to be obtained easily with a simple instrumentation.
The results are available in a short time.