ISO 3220-1975 rus PDF

Full title and description

ISO 3220:1975 — Copper and copper alloys — Determination of arsenic — Photometric method. This International Standard specifies a photometric (spectrophotometric) analytical procedure for the determination of arsenic when present as an alloying element or as an impurity in copper and copper alloys.

Abstract

The document defines the principle, required reagents and apparatus, sampling, detailed test procedure, expression of results and reporting for the photometric determination of arsenic in copper and copper alloys. The method is intended for routine chemical analysis where arsenic concentrations need to be quantified by a photometric reaction.

General information

• Status: Published (International Standard); reviewed and confirmed in 2025, therefore the 1975 edition remains current.
• Publication date: July 1975 (first edition, 1975-07).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 77.120.30 (Metallurgy — Copper and copper alloys).
• Edition / version: Edition 1 (1975).
• Number of pages: 2 pages (concise method standard).

Details above are taken from the ISO bibliographic record and standard catalog listings.

Scope

ISO 3220:1975 applies to the determination of arsenic in copper and all types of copper alloys listed in ISO publications. The standard is intended to provide a reproducible, photometric method suitable for laboratory and quality-control testing where arsenic is present either as a deliberate alloying element or as an impurity. It does not cover alternative analytical techniques (for example, atomic absorption or ICP methods) unless specifically referenced by other standards.

Key topics and requirements

• Principle of the photometric reaction used to form a colored species proportional to arsenic concentration.
• List of reagents and preparation instructions (fresh reagent preparation where required, e.g., ascorbic acid solutions).
• Required laboratory apparatus and photometric equipment specifications (wavelength or instrument guidance).
• Sampling and sample preparation (dissolution/digestion of copper/alloy samples to bring arsenic into solution).
• Step-by-step analytical procedure, calibration and blank-correction methods.
• Expression of results (units, calculation, repeatability) and required elements of the test report.

These topics reflect the method structure and content specified in the standard text.

Typical use and users

Primary users are metallurgical laboratories, quality control and inspection units in copper production and processing facilities, testing laboratories for non-ferrous metals, standards organizations and material certification bodies. The method is used where a simple, low-instrumentation photometric determination of arsenic is sufficient for specification compliance, incoming inspection, batch approval or material certification.

Related standards

ISO 3220:1975 is part of the suite of ISO standards addressing analysis and properties of copper and copper alloys. Laboratories often use it alongside other ISO methods for determination of metallic impurities and for corrosion or mechanical-property testing of copper alloys (examples in the same subject area include ISO methods for antimony and other trace elements and material-specific test methods). National adoptions and equivalents (converted national standards) may exist.

Keywords

ISO 3220:1975; copper; copper alloys; arsenic; photometric method; spectrophotometric analysis; chemical analysis; impurity determination; metallurgical testing.

FAQ

Q: What is this standard?

A: ISO 3220:1975 is an International Standard that specifies a photometric method for determining arsenic in copper and copper alloys.

Q: What does it cover?

A: It covers the principle, reagents, apparatus, sampling, detailed procedure, expression of results and the test report format for the photometric determination of arsenic in copper-based materials. It is concise (2 pages) and focused on the analytical method.

Q: Who typically uses it?

A: Metallurgical and materials testing laboratories, quality control departments in copper production and fabrication, and standards bodies or certification labs that require a standardized photometric procedure for arsenic analysis.

Q: Is it current or superseded?

A: The 1975 edition remains the published International Standard and — according to the ISO bibliographic record — was reviewed and confirmed in 2025, so this edition is current (not withdrawn) as of that review. Users should verify national adoptions or newer analytical-method standards if modern instrumental methods are preferred.

Q: Is it part of a series?

A: It belongs to ISO work on copper and copper-alloy standards (ISO/TC 26). While not a numbered "series" in the sense of sequential parts, it is one of several ISO standards that specify test methods and requirements for copper and its alloys; laboratories commonly use it together with other related ISO methods.

Q: What are the key keywords?

A: Copper; copper alloys; arsenic; photometric; spectrophotometric; chemical analysis; impurity determination; ISO 3220:1975.