ISO 1952-1976 rus PDF

Full title and description

St ISO 1952-1976 (rus) — Brown coals and lignites — Method of extraction for the determination of sodium and potassium soluble in dilute hydrochloric acid. This is the Russian-language edition/translation of the original ISO 1952:1976 International Standard describing a laboratory extraction and determination procedure for soluble sodium and potassium in brown coal and lignite samples.

Abstract

The standard specifies extraction of a sample of brown coal or lignite with boiling 0,005 N hydrochloric acid; the extract is separated (for example by centrifuging) and the sodium and potassium soluble in that extract are determined by any precise analytical method such as a gravimetric or flame-photometric technique. The procedure is intended to give reproducible values for sodium and potassium soluble in dilute hydrochloric acid.

General information

• Status: Withdrawn (original edition withdrawn; later revised by subsequent editions).
• Publication date: June 1976 (Edition 1, 1976).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 73.040 (Fuels — Solid fossil fuels; Technical Committee: ISO/TC 27).
• Edition / version: Edition 1 (1976).
• Number of pages: 2 pages (original publication).

Key bibliographic details above are taken from the ISO catalogue entry for ISO 1952:1976 and associated bibliographic listings; a Russian PDF/translation of the 1976 text is offered by document resellers.

Scope

This standard applies to brown coals and lignites and defines a laboratory extraction procedure using dilute (0,005 N) hydrochloric acid under boiling conditions to extract the fraction of sodium and potassium that is soluble in that medium. It covers sample treatment (extraction, separation of the extract) and indicates appropriate quantitative determination techniques for sodium and potassium in the extract. The method is intended for analytical laboratories performing coal characterization and quality-control measurements.

Key topics and requirements

• Sample type: brown coal and lignite (solid fossil fuels).
• Extractant: 0,005 N hydrochloric acid (dilute HCl) used under boiling conditions.
• Extraction procedure: boiling extraction followed by separation of the extract (e.g., centrifugation).
• Analytes: sodium (Na) and potassium (K) soluble in the dilute HCl extract.
• Permitted determination methods: any precise analytical technique (examples given: gravimetric methods, flame photometry).
• Reporting: results expressed as amounts of Na and K soluble in the specified extract; method reproducibility dependent on laboratory technique and instrumentation.

Typical use and users

Typical users are analytical and research laboratories in the coal and lignite industries, coal quality and fuel testing facilities, environmental and geochemical laboratories analyzing soluble alkali content in low-rank coals, and standards bodies or regulators referencing historical methods. The 1976 procedure is useful for comparisons with legacy data or where the original method is required for consistency with older reports.

Related standards

ISO 1952:1976 has been superseded by later revisions of the same number; the ISO catalogue indicates revisions and later editions (for example ISO 1952:2008 and a more recent published edition ISO 1952:2025 covering determination of extractable metals in dilute hydrochloric acid). Users should consult the latest edition for updated scope and expanded analyte lists.

Keywords

brown coal, lignite, extraction, dilute hydrochloric acid, 0.005 N HCl, sodium, potassium, flame photometry, gravimetric, coal analysis, ISO 1952, Russian translation.

FAQ

Q: What is this standard?

A: ISO 1952:1976 is an International Standard titled "Brown coals and lignites — Method of extraction for the determination of sodium and potassium soluble in dilute hydrochloric acid" (Russian-language edition labelled St ISO 1952-1976 rus). It defines a laboratory extraction and determination procedure for Na and K soluble in dilute HCl in brown coals and lignites.

Q: What does it cover?

A: It covers sample extraction with boiling 0,005 N hydrochloric acid, separation of the extract (for example by centrifuging) and the determination of soluble sodium and potassium using precise quantitative methods such as gravimetric analysis or flame photometry.

Q: Who typically uses it?

A: Analytical laboratories, coal and lignite producers, quality-control and research institutions, environmental and geochemical labs, and standards organizations referencing historical methods or legacy datasets.

Q: Is it current or superseded?

A: The 1976 edition is withdrawn from current standing and has been revised by later editions (notably a 2008 revision in the ISO lifecycle and a subsequently published edition in 2025). For routine and regulatory use, consult the latest published edition (ISO 1952:2025) for current scope and analytical requirements.

Q: Is it part of a series?

A: ISO 1952 is part of ISO's collection of standards for solid fossil fuels and coal analysis maintained under ISO/TC 27; editions of ISO 1952 through the years have addressed related extractable-metal determinations in coals.

Q: What are the key keywords?

A: Brown coal, lignite, extraction, dilute HCl, sodium, potassium, flame photometry, gravimetric, coal analysis, ISO 1952.