ISO 19739-2004 PDF

Full title and description

ISO 19739:2004 — Natural gas — Determination of sulfur compounds using gas chromatography. This International Standard specifies analytical procedures for measuring sulfur-containing compounds in natural gas samples by gas chromatography (GC), including required performance and reporting.

Abstract

ISO 19739:2004 defines methods for the determination of hydrogen sulfide (H2S), carbonyl sulfide (COS), C1–C4 thiols, sulfides and tetrahydrothiophene (THT) in natural gas using gas chromatography. The standard presents alternative procedures (including annexed methods), describes applicability ranges, and sets requirements for sampling, calibration, detection limits, precision, accuracy and result reporting.

General information

• Status: Published (International Standard; currently indicated for revision).
• Publication date: May 2004 (Edition 1, published 2004-05).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 75.060 (Natural gas).
• Edition / version: Edition 1 (2004). Corrected version recorded Nov 2005; Technical corrigendum ISO 19739:2004/Cor 1:2009 also published.
• Number of pages: 55.

Key bibliographic and lifecycle details as recorded by ISO.

Scope

This standard specifies procedures for the determination of selected sulfur compounds in natural gas by gas chromatography. It covers sample preparation and handling, chromatographic separation and detection options, calibration and reference materials, performance characteristics (limits of detection, repeatability, reproducibility), and requirements for expression and reporting of results. Several alternative methods are given in annexes; the applicable concentration ranges depend on the chosen method.

Key topics and requirements

• Target analytes: hydrogen sulfide (H2S), carbonyl sulfide (COS), C1–C4 thiols, sulfides, tetrahydrothiophene (THT).
• Analytical technique: gas chromatography (choices of columns, detectors and operating conditions described).
• Sample collection, preservation and handling requirements to avoid analyte loss or contamination.
• Calibration procedures, use of reference standards and response-factor determination.
• Performance criteria: limits of detection, quantification, repeatability and reproducibility requirements.
• Quality assurance: blank checks, spiking/recovery tests, and routine verification.
• Result expression and reporting: units, significant figures, and reporting of uncertainty and method used.

Typical use and users

Used by analytical laboratories, natural gas producers, transmission and distribution companies, regulatory bodies and environmental monitoring organizations for routine quality control, custody transfer checks and compliance testing relating to sulfur content in natural gas streams and associated products.

Related standards

ISO 19739:2004 replaces earlier withdrawn methods referenced under ISO 6326 series (e.g., ISO 6326‑2:1981 and ISO 6326‑4:1994). A corrigendum (ISO 19739:2004/Cor 1:2009) was issued, and a committee draft (ISO/CD 19739) has been developed to produce a revised edition.

Keywords

natural gas; sulfur compounds; hydrogen sulfide; carbonyl sulfide; thiols; sulfides; tetrahydrothiophene; THT; gas chromatography; GC; analytical method; calibration; detection limit; ISO 19739.

FAQ

Q: What is this standard?

A: ISO 19739:2004 is an International Standard that specifies gas‑chromatographic methods for determining selected sulfur compounds in natural gas.

Q: What does it cover?

A: It covers sample handling, chromatographic procedures, detectors and operating conditions, calibration, performance characteristics (detection limits, precision) and reporting requirements for H2S, COS, C1–C4 thiols, sulfides and THT in natural gas.

Q: Who typically uses it?

A: Analytical laboratories, gas producers and processors, pipeline and distribution operators, regulatory agencies and environmental testing organizations use the standard for quality control and compliance testing.

Q: Is it current or superseded?

A: The standard was published in May 2004 (with a corrected version noted Nov 2005 and a technical corrigendum published April 2009). As recorded by ISO, the standard remains published but has been scheduled for revision and a new edition (committee draft ISO/CD 19739) is under development; it is not marked as fully superseded as of the most recent ISO lifecycle entries.

Q: Is it part of a series?

A: It follows and consolidates earlier withdrawn ISO methods for sulfur analysis in natural gas (for example parts of the ISO 6326 series) and sits within the suite of ISO standards and technical documents addressing natural gas analysis and quality.

Q: What are the key keywords?

A: Natural gas, sulfur compounds, hydrogen sulfide, carbonyl sulfide, thiols, sulfides, tetrahydrothiophene, gas chromatography, ISO 19739.