ISO/TS 22492:2019

Water pipe tobacco products — Determination of carbon monoxide emission of glowing water pipe charcoal — NDIR method

This document specifies a method for the determination of carbon monoxide (CO) emission of glowing water pipe charcoal.

Titre manque

General Information

• Status: Published
• Publication Date: 14-May-2019
• ICS: 65.160 - Tobacco, tobacco products and related equipment
• Technical Committee: ISO/TC 126 - Tobacco and tobacco products
• Drafting Committee: ISO/TC 126 - Tobacco and tobacco products
• Current Stage: 9060 - Close of review
• Start Date: 02-Dec-2025

Standards Content (Sample)

TECHNICAL ISO/TS
SPECIFICATION 22492
First edition
2019-05
Water pipe tobacco products —
Determination of carbon monoxide
emission of glowing water pipe
charcoal — NDIR method
Reference number
ISO/TS 22492:2019(E)
©
ISO 2019

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ISO/TS 22492:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO 2019 – All rights reserved

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ISO/TS 22492:2019(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Standard gas mixtures . 3
7 Procedure. 3
7.1 Conditioning . 3
7.2 Calibration of the NDIR analyser . 3
7.3 Smoking and collection of vapour phase . 3
7.3.1 Preparation of vapour phase collection system . 3
7.3.2 Selection of the charcoal . 4
7.3.3 Preparation of the routine analytical water pipe tobacco smoking machine . 4
7.3.4 Testing procedure . 4
7.4 Measurement of carbon monoxide volume concentration . 4
8 Expression of results . 4
8.1 Calculation of the average emission of carbon monoxide per piece of charcoal. 4
8.2 Calculation of the average emission of carbon monoxide per puff . 5
8.3 Calculation of the average mass of carbon monoxide per piece of charcoal . 5
8.4 Calculation of the average mass of carbon monoxide per puff . 6
9 Repeatability and reproducibility . 6
10 Test report . 6
10.1 General . 6
10.2 Characteristic data about the charcoal sample and identification . 6
10.3 Sampling . 7
10.4 Description of test . 7
10.5 Test results. 7
Bibliography . 8
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ISO/TS 22492:2019(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established 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.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
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For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
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.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 126, Tobacco and tobacco products.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved

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ISO/TS 22492:2019(E)

Introduction
For the testing of water pipe tobacco a routine analytical water pipe tobacco smoking machine is used,
heating the water pipe tobacco with an electrical heater. This is done to prevent contamination of the
collected phase by the emission of glowing water pipe charcoal. Nevertheless, most of the users use
glowing water pipe charcoal to heat up the water pipe tobacco for smoking.
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TECHNICAL SPECIFICATION ISO/TS 22492:2019(E)
Water pipe tobacco products — Determination of carbon
monoxide emission of glowing water pipe charcoal —
NDIR method
1 Scope
This document specifies a method for the determination of carbon monoxide (CO) emission of glowing
water pipe charcoal.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3402, Tobacco and tobacco products — Atmosphere for conditioning and testing
ISO 22486, Water pipe tobacco smoking machine — Definitions and standard conditions
ISO/TS 22487, Water pipe tobacco — Determination of total collected matter and nicotine
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
vapour phase
portion of gas, which passes the glowing charcoal and the water bottle during smoking in accordance
with ISO/TS 22487 using a machine conforming to ISO 22486
4 Principle
Light up a sample of charcoal for water pipe smoking, place it in the sample holder of a routine
analytical water pipe tobacco smoking machine and take puffs in accordance with the procedures
given in ISO/TS 22487. Collection of the vapour phase and measurement of the carbon monoxide using
a non-dispersive infrared (NDIR) analyser calibrated for carbon monoxide. Calculation of the amount of
carbon monoxide per sample.
5 Apparatus
Usual laboratory apparatus and, in particular, the following items.
5.1 Conditioning enclosure, maintained accurately in accordance with the conditions specified in
ISO 3402, for conditioning the cigarette sample prior to smoking (see also 7.1).
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ISO/TS 22492:2019(E)

5.2 Routine analytical water pipe tobacco smoking machine and accessories, complying with the
requirements of ISO 22486.
5.3 Gas-phase collection system, which can be fitted to the water pipe tobacco smoking machine. The
use of the system shall ensure collection of all the generated vapour phase to be stored in a previously
evacuated container for subsequent sampling through an NDIR analyser.
The collection system shall not cause interference with the normal performance of the smoking
machine.
The impermeability of the vapour phase collecting device to a vapour phase shall be checked with a
vapour phase containing a volume fraction of 4 % to 6 % of CO. The CO concentration shall be measured
directly after filling the previously evacuated gas-collecting device. After a period of not less than 2 h,
the measured value of CO concentration in the vapour phase in the device shall not differ by more than
a volume fraction of 0,2 % from the value expected from the first determination.
When a bag is used as the gas-collecting device, it shall be large enough to avoid the final pressure of its
contents exceeding the ambient atmospheric pressure. The volume of the bag should also be no greater
than twice the volume of the gas content collected at atmospheric pressure. In practice, the collection of
the vapour phase from 175 puff requires a bag volume of 120 l to 185 l.
It can be inconvenient to collect all of the vapour phase generated from a single smoked test portion in
one single 120 l bag. Other possibilities exist and may be considered for inclusion in this document.
a) Use two or more smaller bags, which are changed at the same time as the TCM collection pad is
changed after every 35 puff.
...