|Heavy Metals as Lead (FAO Method)|
Heavy metals (Ag, As, Bi, Cd, Cu, Hg, Pb, Sb and Sn) are precipitated as their corresponding sulphides using a saturated H2S solution. The turbidity of the sample is compared to a standard containing only lead that is treated in the same way as the sample.
Note: This analysis is only performed on food grade calcium chloride.
|Normal Measuring Range
||Flakes < 20 mg/kg
Solution < 7 mg/kg
Note: The results should be interpreted as, "less than 20 mg/kg" or "less than 7 mg/kg" of heavy metals as lead."