ISO 6490-2-1983 PDF

Full title and description

St ISO 6490-2:1983 — Animal feeding stuffs — Determination of calcium content — Part 2: Atomic absorption spectrometric method. This part specifies a procedure using atomic absorption spectrometry (AAS) for the determination of calcium in animal feeding stuffs, including sample destruction by incineration, dissolution in hydrochloric acid and measurement in the presence of a releasing agent (lanthanum).

Abstract

ISO 6490-2:1983 defines an AAS-based analytical method for calcium in feed matrices. After any required destruction of organic matter (typically by incineration), calcium is dissolved with hydrochloric acid, lanthanum is added to minimise interferences, and calcium concentration is determined by atomic absorption spectrometry. The method has a reported detection region near 10 mg/kg. The published international record for this part shows it as withdrawn.

General information

• Status: Withdrawn (withdrawal recorded for the 1983 edition).
• Publication date: November 1983 (Edition 1).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 65.120 — Animal feeding stuffs.
• Edition / version: Edition 1 (1983).
• Number of pages: 3 (as recorded in the ISO bibliographic record for the 1983 edition).

Scope

This part specifies an atomic-absorption-spectrometric technique for the quantitative determination of calcium in animal feeding stuffs. It covers sample treatment (destruction of organic matter where necessary), dissolution of ash or sample residue with hydrochloric acid, suppression of interferences by addition of lanthanum, and measurement by AAS. The method is intended for feed matrices where AAS is appropriate and provides a limit of detection on the order of 10 mg/kg. Note: the ISO record shows this part as withdrawn and users should consult later consolidated AAS methods for feed (see Related standards).

Key topics and requirements

• Sample destruction and preparation (incineration/ashing where required) prior to analysis.
• Dissolution of calcium-containing residue using hydrochloric acid.
• Use of lanthanum (or other releasing agents) to reduce chemical interferences during AAS measurement.
• Calibration and quantification by atomic absorption spectrometry with a practical detection limit around 10 mg/kg.
• Quality-control measures implicit to AAS methods (blanks, calibration checks, reference materials)—practices commonly required for trace-element AAS in feed laboratories.

Typical use and users

Analytical and regulatory testing laboratories that analyse mineral composition of animal feeds, feed manufacturers and quality-control departments, research laboratories in animal nutrition, and government food/feed control agencies. Because the 1983 part has been withdrawn, practising laboratories typically use subsequently published consolidated AAS methods for feed analysis.

Related standards

Relevant and related ISO standards include: ISO 6490-1:1985 — Animal feeding stuffs — Determination of calcium content — Part 1: Titrimetric method (alternate/traditional method for higher calcium levels). ISO 6869:2000 — Animal feeding stuffs — Determination of the contents of calcium, copper, iron, magnesium, manganese, potassium, sodium and zinc — Method using atomic absorption spectrometry (consolidated AAS method covering calcium and other elements; current reference for AAS procedures). ISO 6498:2012 — Guidelines for sample preparation for animal feeding stuffs (useful companion for preparing feed samples prior to mineral analysis).

Keywords

calcium; animal feeding stuffs; feed analysis; atomic absorption spectrometry; AAS; sample ashing; lanthanum; hydrochloric acid; detection limit; ISO 6490-2; withdrawn.

FAQ

Q: What is this standard?

A: ISO 6490-2:1983 is an international standard titled "Animal feeding stuffs — Determination of calcium content — Part 2: Atomic absorption spectrometric method" that specifies an AAS procedure for measuring calcium in feed. The ISO bibliographic record shows the 1983 edition as withdrawn.

Q: What does it cover?

A: It covers sample destruction (e.g., incineration/ashing when necessary), dissolution of calcium in hydrochloric acid, addition of lanthanum to reduce interferences, and determination of calcium by atomic absorption spectrometry — with a detection region reported near 10 mg/kg.

Q: Who typically uses it?

A: Laboratories testing animal feeds (private, industrial and regulatory), feed manufacturers' QC labs, research groups in animal nutrition, and official control bodies. In practice, users now generally follow later consolidated AAS methods for feed analysis.

Q: Is it current or superseded?

A: The ISO record lists ISO 6490-2:1983 as withdrawn. Its AAS content for calcium determination has been consolidated into later international AAS methods for feeds (for example ISO 6869:2000 covers calcium by AAS along with several other elements) — therefore users should consult ISO 6869:2000 (and national/adopted versions) or applicable current feed-analysis standards. This statement is an evidence-based inference from the ISO withdrawal record and the later publication of ISO 6869:2000.

Q: Is it part of a series?

A: Yes — ISO 6490 comprises parts addressing calcium determination in feeds; Part 1 (ISO 6490-1:1985) covers a titrimetric method, while Part 2 (1983) covered the AAS method. The broader ISO feed-analysis family (ICS 65.120) contains related standards on sample preparation and determination of other elements.

Q: What are the key keywords?

A: Calcium determination; atomic absorption spectrometry; animal feed; sample ashing; lanthanum releasing agent; hydrochloric acid dissolution; detection limit ~10 mg/kg; ISO withdrawal/supersession (see ISO 6869:2000).