ISO 4751-1984 PDF

Full title and description

ISO 4751:1984 — Copper and copper alloys — Determination of tin content — Spectrometric method. This International Standard specifies a spectrometric procedure for determining tin (Sn) in copper and copper alloys, including principle, reagents, apparatus, sample preparation, procedure, preparation of the calibration graph, expression of results and the test report.

Abstract

The method is applicable to the determination of tin contents between 0.005 % and 0.5 % (m/m) in copper and copper alloys covered by ISO standards. The document describes a spectrometric (spectrophotometric/spectrometric) analytical route including extraction/dissolution steps, reagents and calibration to report tin concentration in mass fraction.

General information

• Status: Withdrawn (no longer current as an active ISO publication).
• Publication date: 1 July 1984.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 77.120.30 — Copper and copper alloys.
• Edition / version: Edition 1 (1984).
• Number of pages: 3.

Key bibliographic and status details are recorded in ISO and several national standards bodies' catalogues; the standard has been withdrawn from active status in later ISO lifecycle actions.

Scope

Specifies a spectrometric technique for quantifying tin in all types of copper and copper alloys listed in related International Standards. The procedure is intended for tin mass fractions in the range 0.005–0.5 % (m/m). The standard covers required reagents, apparatus, sample dissolution/extraction, calibration procedures, calculation and reporting of results, and associated quality considerations for routine laboratory testing.

Key topics and requirements

• Analytical principle: spectrometric determination of tin following appropriate sample dissolution and chemical treatment.
• Applicable range: 0.005 to 0.5 % mass fraction of Sn in copper/copper alloys.
• Reagents and chemicals: specified acids and organic extractants (examples historically include hydrochloric acid, hydrogen peroxide, ammonia solutions and methyl isobutyl ketone for extraction).
• Apparatus: spectrometer/spectrophotometer appropriate for the selected wavelength, glassware and extraction equipment.
• Calibration and expression of results: preparation of calibration graph from standards, calculation of mass fraction, and requirements for test report.
• Quality considerations: procedural blanks, replicate determinations and limiting detection/quantification guidance for the stated range.

Typical use and users

Used historically by metallurgical and chemical test laboratories, foundry and brass/bronze manufacturers, quality control departments, research laboratories and standards organizations for composition control and verification of tin levels in copper alloys. It served as a routine method where tin levels fall within the specified range and where spectrometric equipment is available.

Related standards

Other ISO methods and related documents address tin determination by alternative techniques (for example, volumetric methods) and broader compositional analysis of copper alloys. Notable related standards include ISO 3111 (volumetric determination of tin in copper alloys, older method) and national/adopted equivalents such as DIN ISO 4751 which has been issued as an identical/adopted national standard in some countries. Users should consult current ISO/TC 26 references for up-to-date replacements or alternative methods.

Keywords

copper, copper alloys, tin, tin determination, spectrometric method, spectrophotometry, chemical analysis, ISO 4751, alloy testing, metallurgical analysis.

FAQ

Q: What is this standard?

A: ISO 4751:1984 is an International Standard that specified a spectrometric method for the determination of tin content in copper and copper alloys.

Q: What does it cover?

A: It covers the analytical principle, required reagents and apparatus, sample preparation and procedure, calibration graph preparation, calculation and expression of results, and test report requirements for tin concentrations between 0.005 % and 0.5 % (m/m).

Q: Who typically uses it?

A: Metallurgical and chemical laboratories, manufacturers of copper and copper-alloy products (e.g., brass, bronze), QC/QA personnel, and standards bodies historically used this method for composition control and verification.

Q: Is it current or superseded?

A: ISO 4751:1984 is recorded as withdrawn (no longer an active ISO standard). Users should check current ISO/TC 26 publications or national standards to find any replacement or more recent methods for tin determination in copper alloys. Withdrawal and catalogue records vary by national body; consult your national standards organization for the authoritative status in your country.

Q: Is it part of a series?

A: It is part of ISO/TC 26 work on methods of analysis for copper and copper alloys and is related to other analytical standards (for example ISO 3111 for a volumetric method of tin determination). It may be referenced by national standards and compendia dealing with copper-alloy composition.

Q: What are the key keywords?

A: Copper; copper alloys; tin; spectrometric method; chemical analysis; alloy composition; ISO 4751; determination of tin.