1 Scope
This standard specifies an atomic absorption spectrometric method for the determination of the contents of calcium (Ca), copper (Cu), iron (Fe), magnesium (Mg), manganese (Mn), potassium (K), sodium (Na) and zinc (Zn) in animal feeding stuffs.
The limit of determination for the elements concerned is as follows:
K, Na: 500 mg/kg;
Ca, Mg: 50mg/kg;
Cu, Fe, Mn Zn: 5 mg/kg.
The method is applicable to all animal feeding stuffs.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative documents referred to applies.
GB/T 6682-1992 Water for laboratory use — Specifications (neq ISO 3696:1987)
ISO 6497 Animal feeding stuffs — Sampling
ISO 6498 Animal feeding stuffs — Preparation of test samples
3 Principle
Foreword II
1 Scope
2 Normative References
3 Principle
4 Reagents and Solutions
5 Apparatus
6 Sampling
7 Preparation of Test Sample
8 Procedure
9 Expression of Results
10 Precision
10.1 Interlaboratory tests
10.2 Repeatability
10.3 Reproducibility
11 Test Report
Appendix A (Informative) Results of Interlaboratory Tests
Appendix A (Informative) ISO 6498 Animal Feeding Stuffs — Preparation of Test Samples
Bibliography
