ISO 10101-3-1993 rus PDF

Full title and description

ISO 10101-3:1993 — Natural gas — Determination of water by the Karl Fischer method — Part 3: Coulometric procedure. This is the first (1993) edition of the coulometric Karl Fischer procedure for measuring water in natural gas; a Russian-language ISO page exists and national translations/adoptions may be available for purchase as PDF from ISO or national standards bodies.

Abstract

The standard specifies a coulometric Karl Fischer procedure in which a measured volume of gas is passed through a titration cell and water is absorbed by the anodic solution; iodine is generated coulometrically from iodide and the electrical charge is proportional to the water mass determined. The original 1993 text gives an applicable measurement range (as published) between 5 mg/cm³ and 5 000 mg/cm³. Note: this 1993 edition has been withdrawn and a revised 2022 edition is now available.

General information

• Status: Withdrawn (withdrawal recorded 31 August 2022).
• Publication date: Edition 1 — 1993 (published 30 September / October 1993).
• Publisher: ISO — International Organization for Standardization (ISO Central Secretariat).
• ICS / categories: 75.060 (Natural gas).
• Edition / version: Edition 1 (1993).
• Number of pages: 6 pages (1993 edition).

Scope

The 1993 standard applies a coulometric Karl Fischer titration technique to natural gas and other gases that do not react with Karl Fischer reagents. In the method a known volume of gas is passed through the titration cell where water is absorbed; iodine is generated coulometrically and the measured charge is used to calculate water content. The original edition specifies applicability across a stated range of water concentrations (reported in the 1993 text as 5 mg/cm³ to 5 000 mg/cm³). This edition has since been superseded by ISO 10101-3:2022 (see Related standards).

Key topics and requirements

• Principle of coulometric Karl Fischer titration for gaseous samples (generation of iodine coulometrically and correlation of charge to water mass).
• Procedure for passing a measured gas volume through a titration cell and absorbing water in anodic solution.
• Calibration and calculation basics linking electric charge to water content.
• Applicable sample types: natural gas and other non-reactive gases.
• Reported measurement range in the 1993 edition (as published): 5 mg/cm³ to 5 000 mg/cm³ — note that units and numeric expression were clarified in the revised 2022 edition.

Typical use and users

Laboratories performing gas analysis, transmission and distribution companies, natural gas producers, custody-transfer testing labs, equipment manufacturers (Karl Fischer analysers and gas-sampling systems), and regulatory bodies concerned with gas quality use this procedure as a standardized method for quantifying water in gas streams. For current testing and procurement, users should follow the 2022 revision.

Related standards

ISO 10101 is a multipart standard. Part 1 covers general requirements; Part 2 specifies a volumetric/titration procedure; Part 3 is the coulometric procedure (this 1993 edition). The 1993 Part 3 has been revised and replaced by ISO 10101-3:2022; users should consult the 2022 editions of Parts 1–3 for the current normative text.

Keywords

ISO 10101-3, natural gas, water determination, Karl Fischer, coulometric titration, gas analysis, gas quality, water content, KF method.

FAQ

Q: What is this standard?

A: ISO 10101-3:1993 is the first-edition international standard that specifies a coulometric Karl Fischer method for determining water content in natural gas and other non-reactive gases.

Q: What does it cover?

A: It covers the principle and procedure for passing a measured gas volume through a titration cell where water is absorbed and measured by coulometrically generated iodine; the 1993 text lists an applicable concentration range (5 mg/cm³ to 5 000 mg/cm³ as published).

Q: Who typically uses it?

A: Analytical laboratories, gas producers and transporters, custody-transfer testing services, equipment manufacturers, and standards/regulatory bodies concerned with natural gas quality. For operational use, the current (2022) edition should be used where available.

Q: Is it current or superseded?

A: The 1993 edition is withdrawn (withdrawal recorded 31 August 2022) and has been superseded by ISO 10101-3:2022 (the 2022 edition is the current published standard). Always consult the 2022 edition for up-to-date requirements.

Q: Is it part of a series?

A: Yes — ISO 10101 is a multipart standard (Part 1: general requirements; Part 2: titration/volumetric procedure; Part 3: coulometric procedure). All parts were revised in 2022.

Q: What are the key keywords?

A: Karl Fischer, coulometric titration, water in natural gas, gas analysis, ISO 10101-3, gas quality, water determination.