ISO 10498-2004 PDF

Full title and description

ISO 10498:2004 — Ambient air — Determination of sulfur dioxide — Ultraviolet fluorescence method. This International Standard specifies an automatic ultraviolet fluorescence technique for sampling and continuous determination of sulfur dioxide (SO2) concentrations in ambient air using automatic analysers.

Abstract

ISO 10498:2004 describes the principle, application range and operational requirements for the ultraviolet fluorescence method to measure SO2 in ambient air. It covers automatic (continuous) analysers, typical measurement ranges from micrograms per cubic metre up to milligrams per cubic metre, and provides guidance on calibration, interference control and performance suitable for air quality monitoring networks.

General information

• Status: Published — confirmed as current during ISO systematic review (confirmed 2022).
• Publication date: June 2004 (ISO 10498:2004).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 13.040.20 (Air quality).
• Edition / version: Edition 1 (2004).
• Number of pages: 10 pages.

Scope

Applies to the sampling and determination of sulfur dioxide in ambient air by means of ultraviolet fluorescence automatic analysers. The method is intended for continuous monitoring and is suitable for concentrations from a few micrograms per cubic metre up to a few milligrams per cubic metre (expressible also as a range of volume fractions). The standard addresses instrument principle, performance characteristics, calibration and measures to reduce or correct interferences from other atmospheric constituents.

Key topics and requirements

• Principle of measurement: excitation of SO2 with ultraviolet radiation and detection of characteristic fluorescence emission.
• Performance and applicability: continuous automatic analysers for ambient air monitoring across the microgram/m3 to milligram/m3 range.
• Calibration: use of certified calibration gases and establishment of calibration curves and frequency of checks.
• Interference control: procedures and instrument features to reduce or identify interferences (e.g., aromatic hydrocarbons) and to ensure selectivity.
• Quality assurance and routine checks: recommendations for verification, zero/span checks and maintenance to meet network monitoring requirements.

Typical use and users

Used by national and regional environmental protection agencies, air quality monitoring networks, accredited laboratories, instrument manufacturers and researchers for regulatory ambient SO2 monitoring, network compliance checks and instrument performance verification.

Related standards

ISO 10498 complements other ambient-air reference and regulatory methods for SO2 and gas monitoring. Related documents and equivalents include national adoptions (for example TCVN 7726:2007 adopting ISO 10498:2004), European reference methods and performance standards for continuous SO2 analysers (EN/CEN work and national methods) and various US EPA designated continuous analyser performance specifications and equivalency lists. Other laboratory and field methods for SO2 (wet chemistry or alternative instrument principles) are provided by regional standards bodies and ASTM where applicable.

Keywords

sulfur dioxide; SO2; ultraviolet fluorescence; ambient air; continuous monitoring; automatic analyser; calibration; air quality reference method; interference control.

FAQ

Q: What is this standard?

A: ISO 10498:2004 is an International Standard that specifies an ultraviolet fluorescence method for the continuous determination of sulfur dioxide (SO2) in ambient air using automatic analysers.

Q: What does it cover?

A: It covers the measurement principle (UV-excitation / fluorescence detection), applicable concentration ranges, calibration recommendations, interference management and quality-assurance checks for automatic SO2 analysers used in ambient air monitoring.

Q: Who typically uses it?

A: Environmental agencies, air quality monitoring networks, instrument manufacturers, test laboratories and researchers who operate or evaluate continuous SO2 monitoring equipment.

Q: Is it current or superseded?

A: The 2004 edition (ISO 10498:2004, Edition 1) remains the published version; ISO records show it was reviewed and confirmed (confirmed during a 2022 review) and is currently listed as the active edition.

Q: Is it part of a series?

A: It is part of ISO’s suite of standards addressing ambient air and air quality measurement methods and falls under the work of ISO/TC 146 (Air quality), specifically subcommittee SC 3 concerned with stationary source emissions and ambient air measurement methods.

Q: What are the key keywords?

A: SO2, sulfur dioxide, ultraviolet fluorescence, ambient air, continuous monitoring, automatic analyser, calibration, reference method.