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Milk, milk products, infant formula and adult nutritionals. Determination of minerals and trace elements. Inductively coupled plasma atomic emission spectrometry (ICP-AES) method
This document specifies a method for the quantitative determination of calcium (Ca), copper (Cu), iron (Fe), magnesium (Mg), manganese (Mn), phosphorus (P), potassium (K), sodium (Na) and zinc (Zn) using inductively coupled plasma atomic emission spectrometry (ICP-AES).
The method is applicable for milk, dried milk, butter, cheese, whey, dried whey, infant formula and adult nutritional formula in the ranges given in Table 1.
Table 1
Analytical ranges
| Ca | Cu | Fe | Mg | Mn | P | K | Na | Zn | |
|---|---|---|---|---|---|---|---|---|---|
|
Lower analytical rangea, in mg/100 g |
20 | 0,03 | 0,5 | 3 | 0,01 | 15 | 10 | 10 | 0,2 |
|
Upper analytical rangea, in mg/100 g |
1 280 | 1,2 | 20 | 110 | 1,0 | 800 | 2 000 | 850 | 18 |
a concentrations apply to:
Ranges for non-reconstituted dairy ingredients (butter, cheese, whey powders, whey protein concentrates) are adjusted proportionally upward from these values based upon the sample size used for the ingredient.
For example, if 0,6 g of cheese is digested the ranges will be 4 g/0,6 g = 6,7 × higher.
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