SIST ISO 10498:2004 PDF

Name: SIST ISO 10498:2004 — Ambient air -- Determination of sulfur dioxide -- Ultraviolet fluorescence method
SKU: SIST ISO 10498:2004
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Ambient air -- Determination of sulfur dioxide -- Ultraviolet fluorescence method

Название (английский):

SIST ISO 10498:2004

Ambient air -- Determination of sulfur dioxide -- Ultraviolet fluorescence method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 10
Дата публикации:: 1 декабря 2004 г.
ICS:: 13.040.20
Технический комитет:: KAZ - Air quality

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Описание (английский):

ISO 10498:2004 describes an ultraviolet fluorescence method for sampling and determining sulfur dioxide (SO2) concentrations in the ambient air using automatic analysers. ISO 10498:2004 is applicable to the determination of sulfur dioxide mass concentrations of a few micrograms per cubic metre to a few milligrams per cubic metre or, expressed in terms of volume fraction, from a few microlitres per cubic metre to a few millilitres per cubic metre.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 10498:2004 - Ambient air: Determination of sulfur dioxide (SO2) by ultraviolet fluorescence specifies an automatic-analyser method for sampling and measuring SO2 in ambient air. The standard covers measurement ranges from a few micrograms per cubic metre up to a few milligrams per cubic metre (or, in volume terms, from µL/m3 to mL/m3). It defines the measurement principle, calibration requirements, sampling and instrument components, and routine quality-control procedures to ensure accurate, traceable SO2 measurements.

Key topics and technical requirements

Measurement principle: Ultraviolet fluorescence - SO2 is excited by UV (≈200–220 nm) and emits fluorescence (≈240–420 nm); intensity is proportional to SO2 concentration.

Instrumentation: Components include UV lamp (stabilized supply), reaction chamber, optical filters, photomultiplier detector, modulator, selective traps for interferents, flow controller, pressure regulator and pump.

Calibration: Instruments are not absolute - regular calibration against primary calibration gas standards is required. Calibration protocol includes zero air, span gas and at least five calibration points across the measurement range. Calibration gas flow to the manifold should exceed instrument demand by ≥20%.

Zero air and calibration gases: Zero air must contain no detectable SO2 and have O2 within ±2% of normal air (20.9%). Primary calibration methods referenced include static volumetric dilution, permeation tubes, TCM method and gravimetric gas preparation.

Interferences and controls: Potential interferents: hydrogen sulfide (H2S), aromatic hydrocarbons, nitric oxide (NO), water vapor and low-molecular-weight mercaptans. Selective traps/scrubbers and optical filtering are required; temperature and pressure compensation or correction is necessary.

Sampling line and materials: Use chemically inert materials (e.g., fluorocarbon polymer or glass). Minimize residence time; heat lines or cell above dewpoint to prevent condensation. Particulate inlet filters should be inert and not retain SO2.

Quality assurance & maintenance: Routine zero/span checks (preferably daily, at least weekly), regular servicing (recommended semi‑annually or annually) and comparison of transfer standards with primary standards.

Applications and users

Regulatory ambient-air monitoring and compliance reporting

Continuous urban/regional air quality networks and meteorological stations

Environmental laboratories and reference measurement facilities

Instrument manufacturers, calibration laboratories and field-service technicians

Research applications requiring traceable SO2 time-series or concentration maps

Using ISO 10498 ensures consistency, comparability and traceability of SO2 data for health impact assessments, emissions control, air quality management and regulatory enforcement.

Related standards

Standards referenced by ISO 10498:2004 include:

ISO 4219 (sampling equipment)

ISO 6142, ISO 6144, ISO 6145 (calibration gas preparation methods)

ISO 6349 (permeation method)

ISO 6767 (TCM/pararosaniline SO2 method)

ISO 9169 (performance characteristics of automatic measuring systems)

ISO 6879 (operational quality control examples)

These related standards support calibration, sampling best practice and performance verification for traceable SO2 measurement.

SIST ISO 10498:2004 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 10498:2004

Ambient air — Determination of sulfur dioxide — Ultraviolet fluorescence method

SIST ISO 4219:1995

Air quality - Determination of gaseous sulphur compounds in ambient air - Sampling equipment

ISO 6142-1:2015/Amd 1:2020

Gas analysis — Preparation of calibration gas mixtures — Part 1: Gravimetric method for Class I mixtures — Am…

SIST EN ISO 6144:2006

Gas analysis - Preparation of calibration gas mixtures - Static volumetric method (ISO 6144:2003)

SIST EN ISO 6145-1:2019

Gas analysis - Preparation of calibration gas mixtures using dynamic methods - Part 1: General aspects (ISO 6…

ISO 6349:1979

Gas analysis — Preparation of calibration gas mixtures — Permeation method

SIST ISO 6767:1996

Ambient air - Determination of the mass concentration of sulfur dioxide - Tetrachloromercurate (TCM)/pararosa…

SIST EN ISO 9169:2007

Air quality - Definition and determination of performance characteristics of an automatic measuring system (I…