ISO 4219:1979

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

Specifies general requirements. Is primarily intended to be used in conjunction with ISO 4220 and ISO 4221 which give supplement details relating to means of sampling, the absorbing solution and the sampling procedure.

Qualité de l'air — Détermination des composés soufrés gazeux dans l'air ambiant — Appareillage d'échantillonnage

Kakovost zraka - Določevanje plinastih žveplovih spojin v zunanjem zraku - Oprema za vzorčenje

General Information

• Status: Published
• Publication Date: 31-Aug-1979
• ICS: 13.040.20 - Ambient atmospheres
• Technical Committee: ISO/TC 146/SC 3 - Ambient atmospheres
• Drafting Committee: ISO/TC 146/SC 3 - Ambient atmospheres
• Current Stage: 9093 - International Standard confirmed
• Start Date: 18-Sep-2023
• Completion Date: 13-Dec-2025
• Ref Project: SIST ISO 4219:1995 - Air quality - Determination of gaseous sulphur compounds in ambient air - Sampling equipment

Overview

ISO 4219:1979 is an international standard developed by the International Organization for Standardization (ISO) that specifies the general requirements for sampling equipment used to determine gaseous sulfur compounds in ambient air. Primarily focused on sulfur dioxide (SO₂) and similar reactive sulfur gases, this standard is essential for accurate air quality monitoring. It is designed to be used alongside ISO 4220 and ISO 4221, which provide complementary details on sampling procedures and absorbing solutions.

By defining standardized sampling equipment requirements, ISO 4219 ensures reliable collection, absorption, and analysis of sulfur gases, which is critical for assessing air pollution levels and protecting environmental and human health.

Key Topics

• Scope and Application
  Applicable exclusively to ambient air sampling, ISO 4219 specifies equipment requirements for detecting sulfur dioxide and other gaseous sulfur compounds relevant to air quality assessments.

• Sampling Principle
  The method involves drawing ambient air through an absorber to trap gaseous sulfur compounds in a liquid medium, enabling subsequent chemical analysis.

• Equipment Components
  The standard outlines essential equipment parts, including:

  • Air intake (with optional protective funnel against precipitation)
  • Connecting tubing (6 to 8 mm internal diameter, airtight, chemically inert)
  • Particulate filter and filter holder
  • Absorber (absorption bottle) designed for specific analytical methods
  • Protection filter to shield gas meters or flow regulators from liquid droplets
  • Sampling pump for consistent airflow
  • Gas meter or airflow regulator to measure sampled air volume accurately

• Material Requirements
  To avoid interference, all components in contact with sulfur gases must be made of chemically inert materials such as PTFE, glass with flexible PVC connectors, polypropylene, or treated plastics. Tubing and filters should not absorb or react with the analytes.

• Installation Guidelines
  The equipment should be installed away from pollution sources and obstacles, with an air intake at least 1 meter above any surface and 3 meters from large horizontal areas. Tubing should be arranged to avoid water accumulation and minimize length (<6 meters) to ensure sampling integrity.

• Calibration and Maintenance
  Flow meters or orifice-based flow regulators must be calibrated regularly against laboratory wet-gas meters to ensure accurate air volume measurements. Regular cleaning and airtightness checks are vital for reliable sampling.

Applications

ISO 4219:1979 supports precise monitoring of sulfur dioxide and related sulfur gases in ambient air as part of environmental air quality management and regulatory compliance efforts. Accurate detection of these pollutants is crucial for:

• Air Pollution Control
  Identifying and quantifying sulfur compound levels to evaluate pollution sources and implement mitigation strategies.

• Environmental Impact Assessment
  Monitoring sulfur gas concentrations to assess the effects of industrial emissions on ecosystems and human health.

• Atmospheric Research
  Providing standardized methods for scientific studies on air composition, pollutant dispersion, and atmospheric chemistry involving sulfur compounds.

• Public Health and Safety
  Ensuring ambient air quality meets health-based standards to protect populations from exposure to harmful sulfur gases.

Related Standards

ISO 4219 is designed to work in tandem with several related air quality standards for a comprehensive approach to sulfur compound determination:

• ISO 4220: Specifies sampling methods detailing how air is drawn and absorbed for sulfur compound analysis.
• ISO 4221: Provides procedures for absorption solution preparation and sampling techniques.
• ISO 4227: Addresses specific spectrophotometric analysis of sulfur dioxide concentrations.
• Additional upcoming standards focus on tetrachloromercurate pararosaniline spectrophotometric methods for sulfur dioxide mass concentration determination.

These complementary standards ensure a full suite of procedures from air sampling through chemical analysis, facilitating consistent and internationally recognized air quality assessments.

---

Keywords: ISO 4219, air quality, sulfur dioxide sampling, gaseous sulfur compounds, ambient air monitoring, air pollution measurement, sampling equipment standards, air quality standards, environmental monitoring, sulfur compound determination.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-1995
.DNRYRVW]UDND'RORþHYDQMHSOLQDVWLKåYHSORYLKVSRMLQY]XQDQMHP]UDNX
2SUHPD]DY]RUþHQMH
Air quality - Determination of gaseous sulphur compounds in ambient air - Sampling
equipment
Qualité de l'air - Détermination des composés soufrés gazeux dans l'air ambiant -
Appareillage d'échantillonnage
Ta slovenski standard je istoveten z: ISO 4219:1979
ICS:
13.040.20 Kakovost okoljskega zraka Ambient atmospheres
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION@MEXAYHAPOAHAR OPrAHM3AWlR fl0 CTAHAAPTM3A~MM~ORGANISATlON INTERNATIONALE DE NORMALISATION
Air quality - Determination of gaseous sulphur
compounds in ambient air - Sampling equipment
Appareillage d %chan tillonnage
Qual26 de l’air - Determination des compostk soufrks gazeux dans l’air ambiant -
First edition - 1979-09-15
UDC 614.71 : 543.272.5 : 543.053 Ref. No. ISO 4219-1979 (E)
Descriptors : air pollution, air, Chemical analysis, determination of content, sulphur dioxide.
Price based on 4 pages
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards institutes (ISO member bodies). The work of developing Inter-
national Standards is carried out through ISO technical committees. Every member
body interested in a subject for which a technical committee has been set up has the
right to be represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council.
International Standard ISO 4219 was developed by Technical Committee ISO/TC 146,
Air guality, and was circulated to the member bodies in April 1977.
lt has been approved by the member bodies of the following countries :
South Africa, Rep. of
Australia Germany, F. R.
Austria Spain
Hungary
Belgium India Sweden
Iran Switzerland
Bulgaria
Canada Japan Turkey
Czec hoslova kia Mexico USA
Netherlands USSR
Denmark
Finland Norway Yugoslavia
France Poland
The member body of the following country expressed disapproval of the document on
tech nical grounds
United Kingdom
0 International Organkation for Standardkation, 1979
Printed in Switzerland
INTERNATIONAL STANDARD
ISO 4219-1979 (E)
Air quality - Determination of gaseous sulphur
compounds in ambient air - Sampling equipment
0 Introduction which specify supplementary details relating to the sampling
equipment, the absorbing Solution and the sampling
The determination of gaseous sulphur compounds in ambient procedure.
atmospheres requires as a first step the collection of a Sample
of air and the absorption of the constituents to be determined
The sampling equipment specified may also be used for
in a suitable liquid medium. The specific absorption media and determinations other than gaseous sulphur compounds.
some of the sampling conditions may vary according to the
methods. This International Standard provides details of the
equipment required thus obviating the necessity for
specification in detail of the equipment in each of the separate
3 Definition
International Standards concerned with methods of
determination of gaseous sulphur compounds. The method of
gaseous sulphur compounds : Sulpur dioxide, other
sampling is covered in ISO 4220 and 4221.
gaseous sulphur compounds and water-soluble acidic gases
determined according to the method of ISO 4220.
1 Scope
This International Standard specifies general requirements for
the equipment for the sampling of ambient air in Order to
4 Principle
determine gaseous sulphur compounds, particularly sulphur
dioxide.
Drawing of ambient air through an absorber to trap the gaseous
sulphur compounds being determined. Under certain cir-
cumstances, detailed in the relevant International Standard,
2 Field of application
filtration of the air to remove interfering particulates.
This International Standard is applicable to ambient air. lt is
applicable to the sampling of air for sulphur dioxide and other
gaseous sulphur compounds as defined in clause 3.
5 Equipment
lt is primarily intended to be used in conjunction with the
Because gaseous sulphur compounds are very reactive, the use
following International Standards : 1)
of the correct materials for all Parts of the sampling equipment
I SO 4220, Air quality - Determination of a gaseous acid coming into contact with the air containing these compounds is
Titrimetric method with indica tor or essential.
pollu tion index -
potentiometric end-point detection.
Materials used shall not absorb any of the constituents to be
Determination of mass concen tra tion determined and shall not react with them to produce a reaction
ISO 4227, Air quality -
product that might interfere with subsequent determination or
of sulphur dioxide in ambient air - Thor-in spectrophotometric
to reduce the concentration of the constituents.
method.
1) An international Standard specifying a tetrachloromercurate (KM) pararosaniline spectrophotometric method for the determination of the mass
Concentration of sulphur dioxide in ambient air is in preparation.

ISO 4219-1979 (EI
The equipment shall consist essentially of the following com-
5.1 Air intake
ponents, each of which is separately described in 5.1 to 5.7 :
No particular design of air intake is required for this Inter-
-
air intake; national Standard concerning determination of gaseous
sulphur compounds only. If the air intake may be exposed to
-
connecting tubing; precipitation, an inverted funnel may be used as protection, as
shown in figure 2.
- particulate filter and filter holder;
If it is intended to carry out other determinations, e.g. concen-
-
absorber; tration of black smoke with the same equipment
...

International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION@MEXAYHAPOAHAR OPrAHM3AWlR fl0 CTAHAAPTM3A~MM~ORGANISATlON INTERNATIONALE DE NORMALISATION
Air quality - Determination of gaseous sulphur
compounds in ambient air - Sampling equipment
Appareillage d %chan tillonnage
Qual26 de l’air - Determination des compostk soufrks gazeux dans l’air ambiant -
First edition - 1979-09-15
UDC 614.71 : 543.272.5 : 543.053 Ref. No. ISO 4219-1979 (E)
Descriptors : air pollution, air, Chemical analysis, determination of content, sulphur dioxide.
Price based on 4 pages
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards institutes (ISO member bodies). The work of developing Inter-
national Standards is carried out through ISO technical committees. Every member
body interested in a subject for which a technical committee has been set up has the
right to be represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council.
International Standard ISO 4219 was developed by Technical Committee ISO/TC 146,
Air guality, and was circulated to the member bodies in April 1977.
lt has been approved by the member bodies of the following countries :
South Africa, Rep. of
Australia Germany, F. R.
Austria Spain
Hungary
Belgium India Sweden
Iran Switzerland
Bulgaria
Canada Japan Turkey
Czec hoslova kia Mexico USA
Netherlands USSR
Denmark
Finland Norway Yugoslavia
France Poland
The member body of the following country expressed disapproval of the document on
tech nical grounds
United Kingdom
0 International Organkation for Standardkation, 1979
Printed in Switzerland
INTERNATIONAL STANDARD
ISO 4219-1979 (E)
Air quality - Determination of gaseous sulphur
compounds in ambient air - Sampling equipment
0 Introduction which specify supplementary details relating to the sampling
equipment, the absorbing Solution and the sampling
The determination of gaseous sulphur compounds in ambient procedure.
atmospheres requires as a first step the collection of a Sample
of air and the absorption of the constituents to be determined
The sampling equipment specified may also be used for
in a suitable liquid medium. The specific absorption media and determinations other than gaseous sulphur compounds.
some of the sampling conditions may vary according to the
methods. This International Standard provides details of the
equipment required thus obviating the necessity for
specification in detail of the equipment in each of the separate
3 Definition
International Standards concerned with methods of
determination of gaseous sulphur compounds. The method of
gaseous sulphur compounds : Sulpur dioxide, other
sampling is covered in ISO 4220 and 4221.
gaseous sulphur compounds and water-soluble acidic gases
determined according to the method of ISO 4220.
1 Scope
This International Standard specifies general requirements for
the equipment for the sampling of ambient air in Order to
4 Principle
determine gaseous sulphur compounds, particularly sulphur
dioxide.
Drawing of ambient air through an absorber to trap the gaseous
sulphur compounds being determined. Under certain cir-
cumstances, detailed in the relevant International Standard,
2 Field of application
filtration of the air to remove interfering particulates.
This International Standard is applicable to ambient air. lt is
applicable to the sampling of air for sulphur dioxide and other
gaseous sulphur compounds as defined in clause 3.
5 Equipment
lt is primarily intended to be used in conjunction with the
Because gaseous sulphur compounds are very reactive, the use
following International Standards : 1)
of the correct materials for all Parts of the sampling equipment
I SO 4220, Air quality - Determination of a gaseous acid coming into contact with the air containing these compounds is
Titrimetric method with indica tor or essential.
pollu tion index -
potentiometric end-point detection.
Materials used shall not absorb any of the constituents to be
Determination of mass concen tra tion determined and shall not react with them to produce a reaction
ISO 4227, Air quality -
product that might interfere with subsequent determination or
of sulphur dioxide in ambient air - Thor-in spectrophotometric
to reduce the concentration of the constituents.
method.
1) An international Standard specifying a tetrachloromercurate (KM) pararosaniline spectrophotometric method for the determination of the mass
Concentration of sulphur dioxide in ambient air is in preparation.

ISO 4219-1979 (EI
The equipment shall consist essentially of the following com-
5.1 Air intake
ponents, each of which is separately described in 5.1 to 5.7 :
No particular design of air intake is required for this Inter-
-
air intake; national Standard concerning determination of gaseous
sulphur compounds only. If the air intake may be exposed to
-
connecting tubing; precipitation, an inverted funnel may be used as protection, as
shown in figure 2.
- particulate filter and filter holder;
If it is intended to carry out other determinations, e.g. concen-
-
absorber; tration of black smoke with the same equipment (see clause 21,
the air must be drawn in through an air intake of appropriate
- protection f ilter; diameter.
-
sampling pump;
5.2 Connecting tubing
- gas meter or air-flow regulator. 52.1 Dimensions
A schematic layout of a typical assembly System is shown in The internal diameter of the tubing shall be 6 to 8 mm and the
figure 1 : internal sur-face shall be smooth.
Sampling
Protection Gas meter
Air intake Particulate Absorber
or air-flow
filter and filter Pump
f
...

Norme internationale
INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONWEWYHAPOJIHAR OPrAHH3ALWlR fl0 CTAH~PTH3AIJWWORGANISATION INTERNATIONALE DE NORMALISATION
- Détermination des composés soufrés
Qualité de l’air
gazeux dans l’air ambiant 1 Appareillage
d’échantillonnage
Air quality - Determination of gaseous sulphur compounds in ambient air - Sampling equipment
Première édition - 1979-09-E
Réf. no : ISO 4219-1979 (F)
CDU 614.71 : 543.272.5 : 543.053
.
analyse chimique, dosage, matériel d’échantillonnage.
Descripteurs : pollution atmosphérique, air,
Prix basé sur 4 pages
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale
d’organismes nationaux de normalisation (comités membres de I’ISO). L’élaboration
des Normes internationales est confiée aux comités techniques de I’ISO. Chaque
comité membre intéressé par une étude a le droit de faire partie du comité technique
correspondant. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I’ISO, participent également aux travaux.
Les projets de Normes internationales adoptés par les comités techniques sont soumis
aux comités membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I’ISO.
La Norme internationale ISO 4219 a été élaborée par le comité technique ISO/TC 146,
Qualité de /‘air, et a été soumise aux comités membres en avril 1977.
Les comités membres des pays suivants l’ont approuvée :
Finlande Pologne
Afrique du Sud, Rép. d’
Allemagne, R. F. France Suède
Suisse
Australie Hongrie
Inde Tchécoslovaquie
Autriche
Iran Turquie
Belgique
URSS
Bulgarie Japon
Mexique USA
Canada
Yougoslavie
Danemark Norvége
Espagne Pays-Bas
Le comité membre du pays suivant l’a désapprouvée pour des raisons techniques :
Royaume-Uni
0 Organisation internationale de normalisation, 1979
Imprimé en Suisse
NORME INTERNATIONALE
ISO 4219-1979 (F)
Détermination des composés soufrés
Qualité de l’air -
gazeux dans l’air ambiant - Appareillage
d’échantillonnage
Ces normes spécifient des détails supplémentaires relatifs à
0 Introduction
l’appareillage d’échantillonnage, la solution d’absorption et la
La détermination des composés soufrés gazeux dans l’atmos- méthode d’échantillonnage.
phère ambiante nécessite tout d’abord le prélèvement d’un
L’appareillage d’échantillonnage spécifié peut également être
échantillon d’air et l’absorption des constituants à déterminer
dans une phase liquide satisfaisante. Le milieu d’absorption employé pour des déterminations autres que celles des compo-
spécifique et certaines conditions d’échantillonnage peuvent sés soufrés gazeux.
varier en fonction des méthodes. La présente Norme internatio-
nale présente en détail l’appareillage requis, ce qui évite la
nécessité de spécifier en détail l’appareillage dans chaque
3 Définition
Norme internationale traitant d’une méthode donnée de déter-
mination des composés soufrés. La méthode d’échantillonnage
est couverte par I’ISO 4220 et VIS0 4221. composh soufrh gazeux : Dioxyde de soufre, autres com-
posés soufrés gazeux et gaz acides solubles dans l’eau, déter-
minés conformément à la méthode spécifiée dans I’ISO 4220.
1 Objet
La présente Norme internationale spécifie les caractéristiques
générales requises pour l’appareillage d’échantillonnage de l’air
4 Principe
ambiant afin de déterminer les composés soufrés gazeux, et en
particulier le dioxyde de soufre.
L’air ambiant est aspiré à travers un dispositif d’absorption afin
de piéger les composés soufrés gazeux que l’on désire mesurer.
2 Domaine d’application
Dans certaines conditions dont le détail est donné dans la
Norme internationale correspondante, l’air est filtré afin d’élimi-
La présente Norme internationale s’applique à l’air ambiant. Elle
ner les particules interférentes.
s’applique à l’échantillonnage de l’air pour le dioxyde de soufre
et d’autres composés soufrés gazeux tels que définis dans le
chapitre 3.
5 Appareillage
Elle est destinée en premier lieu à être employée conjointement
avec les Normes internationales suivantes :l) Les composés soufrés gazeux étant trés réactifs, il est indispen-
sable d’utiliser des matériaux appropriés pour tous les éléments
ISO 4220, Qualité de l’air - Dé termina tion d’un indice de pollu- de l’appareillage de prélevement en contact avec l’air contenant
tion gazeuse acide - Méthode titrimétrique avec indicateur ou ces composés a analyser.
détection po ten tiomé trique du point final.
Les matériaux utilisés ne doivent absorber aucun des consti-
/SO 4221, Qualité de l’air - Dé termina tion de la concentration tuants à déterminer et ne doivent pas, par réaction avec eux,
produire un produit qui risquerait d’interférer avec la détermina-
en masse de dioxyde de soufre dans l’air ambiant - Méthode
spectrophotométrique au thorin. tion ultérieure ou de réduire la concentration des constituants.
1) Une Norme internationale spécifiant une méthode spectrophotométrique au tétrachloromercurate (TCM) /pararosaniline, pour la détermination de
la concentration en masse de dioxyde de soufre dans l’air ambiant, est en préparation.

IsO 42194979 (FI
L’appareillage doit être essentiellement composé des éléments 5.1 Prise d’air
suivants décrits individuellement en 5.1 à 5.7 :
Dans le cas d’un prélèvement effectué uniquement pour la
détermination des composés soufrés gazeux, aucune spécifica-
-
prise d’air;
tion particulière n’est requise pour la conception de la prise
d’air. Si la prise d’air peut être exposée aux précipitations, on
- tuyauterie de raccordement;
peut utiliser un entonnoir renversé comme protection, confor-
mément à la figure 2.’
- filtre à particules et porte-filtre;
Si l’on envisage d’effectuer d’autres déterminations, par exem-
-
absorbeur; ple l’indice.de fumée noire, au moyen de ce même matériel (voir
chapitre 2), on aspire l’air par une prise d’air de diamètre appro-
- filtre de protection; prié.
5.2 Tuyauterie de raccordement
- pompe de prélévement;
-
5.2.1 Dimensions
compteur a gaz ou régulateur de débit dlair.
Le diamétre intérieur de la tuyauterie doit être de 6 à 8 mm et sa
La figure 1 présente le schéma d’un assemblage type d’échan-
surface intérieure doit être lisse.
tillonnage.
Compteur à gaz
Absorbeur Filtre de Pompe de
Filtre à particules
Prise d’air .
OU régulateur
protection prélévement
et porte-filtre
de débit d’air
Figure 1 - Disposition schématisée de l’appareillage d’échantillo
...