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BS EN ISO 21424:2020

BS EN ISO 21424:2020

$167.15

Milk, milk products, infant formula and adult nutritionals. Determination of minerals and trace elements. Inductively coupled plasma mass spectrometry (ICP-MS) method

Published By Publication Date Number of Pages
BSI 2020 40
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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), zinc (Zn), chromium (Cr), molybdenum (Mo) and selenium (Se) using inductively coupled plasma and mass spectrometry (ICP-MS).

The method is applicable for the determination of all 12 elements in infant formula and adult nutritional products. The method is also applicable for milk, milk powder, whey powder, butter and cheese excluding the determination of Cr, because all Cr results were below the quantification limit and reproducibility could not be determined in these matrices[1]. The present method is an extension of ISO 20649 | IDF 235 (AOAC 2011.19[2]) which was validated only for Cr, Mo and Se in infant formula and adult nutritional products.

The ranges given in Table 1 are in scope (see also Table A.1).

Table 1

Analytical ranges

a Concentrations apply to

ā€” milk and ā€ready-to-feedā€ liquid as-is, using a typical sample size of 1 g per final analytical solution volume of 50 ml, and

ā€” reconstituted milk powder, reconstituted infant formula powder and reconstituted adult nutritional powder (25 g into 200 g of water), using a typical sample size of 1,8 g of the reconstituted slurry per final analytical solution volume of 50 ml.

Ranges for non-reconstituted dairy ingredients (butter, cheese, whey powder, whey protein concentrate) are adjusted proportionally upward from these values based upon the sample size used for the ingredient. For example, if 0,3 g of cheese is digested the ranges will be 1 g/ 0,3 g = 3,3 Ć— higher.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 European foreword
Endorsement notice
6 Foreword
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Principle
5 Reagents
11 6 Preparation of standards and solutions
6.1 Surfactant solution (optional, approximately 5 %)
6.2 Nitric acid rinse solution for autosampler rinse port, 2 %
6.3 P/A factor tuning working solution
6.4 Calibration blank (Cal Blk) and preparation blank (PB) solution
12 6.5 Calibration standard solution set
7 Apparatus
13 8 Preparation of test sample
14 9 Determination
15 10 Calculation
16 11 Precision data
11.1 General
11.2 Repeatability
11.3 Reproducibility
12 Test report
17 Annex A (informative) Precision data
39 Bibliography

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BS EN ISO 21424:2020
$167.15