ISO 6792-1982 PDF

Full title and description

Butadiene for industrial use — Determination of oxygen and argon in the gaseous phase above liquid butadiene — Gas chromatographic method (ISO 6792:1982). The standard specifies a gas‑chromatographic procedure, using a thermal conductivity detector, for measuring oxygen and argon present in the vapour phase over liquid butadiene; it describes two operating temperature regimes (ambient and −78 °C) with corresponding separation performance.

Abstract

This International Standard defines a gas chromatographic method with a thermal conductivity detector to determine oxygen and argon in the gas phase above liquid butadiene. At ambient temperature the method measures the combined content of oxygen and argon (they are not resolved), while operation at −78 °C separates the two gases and allows individual determination. The procedure is intended for quality control and analytical verification of industrial butadiene.

General information

• Status: Withdrawn (withdrawal stage recorded by ISO).
• Publication date: June 1982.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 71.080.10 (Organic chemistry — methods of analysis for hydrocarbons and related substances).
• Edition / version: Edition 1 (1982).
• Number of pages: 2.

Basic bibliographic and status metadata are taken from the ISO bibliographic record for ISO 6792:1982.

Scope

This standard applies to industrial butadiene and covers the determination of oxygen and argon in the gaseous phase above liquid butadiene using gas chromatography with a thermal conductivity detector. It specifies the operational principle, the two temperature regimes (ambient and −78 °C), and the interpretation of results (total O2+Ar at ambient; separate O2 and Ar when analysed at −78 °C). The procedure is targeted at laboratories performing product quality control and acceptance testing of butadiene.

Key topics and requirements

• Gas chromatographic analysis using a thermal conductivity detector (TCD).
• Two operating temperature regimes: ambient (measures combined O2 + Ar) and −78 °C (resolves O2 and Ar).
• Sampling of the vapour phase above liquid butadiene and preparation precautions to avoid contamination and loss of dissolved gases.
• Calibration and quantification procedures for low levels of oxygen and argon in the headspace gas.
• Reporting conventions for combined versus separated gas results and limits of detection inherent to the chosen operating conditions.
• General laboratory safety and handling considerations for flammable and reactive hydrocarbon liquids and their vapours (recommended as part of good practice when applying the method).

Typical use and users

Used by analytical and quality control laboratories in chemical manufacturing, specifically producers and handlers of butadiene and related petrochemical products. Typical users include industrial chemists, process quality engineers, laboratory technicians, and regulatory/compliance testing services concerned with gas impurities in stored or transported butadiene. The method is suited to routine QC checks and production verification where knowledge of oxygen/argon content in the headspace is relevant to product quality or safety.

Related standards

Other ISO standards and technical committee publications dealing with analytical methods for hydrocarbons, gas chromatography techniques, and safety/data reporting for industrial chemicals are related. Users often consult additional ISO documents and national methods on gas analysis and hydrocarbon testing when implementing or updating laboratory procedures for butadiene. (For authoritative status and cross‑references consult the current ISO catalogue.)

Keywords

butadiene; gas chromatography; thermal conductivity detector; oxygen; argon; headspace analysis; vapour phase; −78 °C; quality control; ISO 6792:1982.

FAQ

Q: What is this standard?

A: ISO 6792:1982 is an ISO analytical standard titled "Butadiene for industrial use — Determination of oxygen and argon in the gaseous phase above liquid butadiene — Gas chromatographic method." It defines a GC/TCD procedure for measuring O2 and Ar in the vapour above liquid butadiene.

Q: What does it cover?

A: It covers sampling and gas‑chromatographic determination of oxygen and argon in the headspace above liquid butadiene, including two operating temperatures (ambient and −78 °C) that affect whether O2 and Ar are measured together or resolved separately.

Q: Who typically uses it?

A: Chemical producers, QC laboratories, analytical chemists, and testing services handling industrial butadiene use the method for product quality checks and impurity monitoring.

Q: Is it current or superseded?

A: The ISO record indicates ISO 6792:1982 has been withdrawn (stage recorded by ISO). Users should check the ISO catalogue or their national standards body for any replacement or more recent methods before adopting this procedure in a current laboratory.

Q: Is it part of a series?

A: It is a standalone analytical method within the scope of ISO/TC 47 work on analytical chemistry for hydrocarbons and related substances; laboratories often use it alongside other ISO and national standards covering hydrocarbon analysis and gas chromatography techniques.

Q: What are the key keywords?

A: butadiene, gas chromatography, thermal conductivity detector, oxygen, argon, headspace, vapour analysis, ISO 6792:1982.