ISO 17299-5:2014
(Main)Textiles — Determination of deodorant property — Part 5: Metal-oxide semiconductor sensor method
Textiles — Determination of deodorant property — Part 5: Metal-oxide semiconductor sensor method
ISO 17299-5:2014 specifies a deodorant test method using an odour analyser equipped with multiple metal-oxide semiconductor sensors against composite odours. The artificial composite odours used in ISO 17299-5:2014 are a quasi sweat odour, a quasi body odour (nonenal mixture odour) and a quasi excrement odour. ISO 17299-5:2014 applies to all kinds of textile products, such as woven fabrics, knits, threads, yarns, fibres, braids, cords, etc.
Textiles — Détermination des propriétés de neutralisation d'odeurs — Partie 5: Méthode par capteur à semi-conducteur métal-oxyde
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 17299-5
First edition
2014-04-15
Textiles — Determination of
deodorant property —
Part 5:
Metal-oxide semiconductor sensor
method
Textiles — Détermination de la propriété de déodorant —
Partie 5: Méthode par capteur à semi-conducteur métal-oxyde
Reference number
©
ISO 2014
© ISO 2014
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ii © ISO 2014 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagents . 2
6 Apparatus and materials. 3
7 Preparation of the odour test gas . 3
7.1 Master gas . 3
7.2 Preparation of the test quasi unpleasant odours . 4
8 Sensor response check . 5
9 Preparation of calibration curve . 5
9.1 Initial concentration . 5
9.2 Odour unit concentration for quasi unpleasant odours . 5
9.3 Creation of calibration curve for quasi unpleasant odours . 6
10 Deodorant test . 7
10.1 Preparation of test specimen . 7
10.2 Conditioning of the specimen . 7
10.3 Test procedure . 7
11 Calculation of the odour unit concentration . 8
12 Calculation of reduction rate . 8
13 Test report . 9
Annex A (informative) Example of the test .10
Annex B (informative) Specifications of the odour test instrument .14
Annex C (informative) Practical testing results .17
Bibliography .26
Foreword
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The committee responsible for this document is ISO/TC 38, Textiles.
ISO 17299 consists of the following parts, under the general title Textiles — Determination of deodorant
property:
— Part 1: General principle
— Part 2: Detector tube method
— Part 3: Gas chromatography method
— Part 4: Condensation sampling analysis
— Part 5: Metal-oxide semiconductor sensor method
iv © ISO 2014 – All rights reserved
Introduction
This part of ISO 17299 describes a test method using a testing instrument equipped with multiple metal-
oxide semiconductor sensors against composite odours for all textiles. The multiple sensors improve
accuracy for several kinds of composite odours.
INTERNATIONAL STANDARD ISO 17299-5:2014(E)
Textiles — Determination of deodorant property —
Part 5:
Metal-oxide semiconductor sensor method
1 Scope
This part of ISO 17299 specifies a deodorant test method using an odour analyser equipped with multiple
metal-oxide semiconductor sensors against composite odours. The artificial composite odours used in
this part of ISO 17299 are a quasi sweat odour, a quasi body odour (nonenal mixture odour) and a quasi
excrement odour.
This part of ISO 17299 applies to all kinds of textile products, such as woven fabrics, knits, threads,
yarns, fibres, braids, cords, etc.
2 Normative references
ISO 17299-1, Textiles — Determination of deodorant property — Part 1: General principle
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
quasi unpleasant odour
artificial composite odour used to simulate an unpleasant odour
Note 1 to entry: Artificial composite odours for the purpose of this part of ISO 17299 are as follows:
— quasi sweat odour: ammonia, acetic acid, isovaleric acid;
— quasi body odour (nonenal mixture odour): ammonia, acetic acid, isovaleric acid, nonenal;
— quasi excrement odour: ammonia, acetic acid, hydrogen sulfide, methyl mercaptan, indole.
3.2
odour unit concentration
concentration defined as the rate of the odour chemical concentration in μl/l against the olfactory
threshold concentration
Note 1 to entry: It is expressed in OU/m .
3.3
olfactory threshold concentration
minimum concentration at which human could perceive
Note 1 to entry: Olfactory threshold concentration value of the odour chemical substances used in this part of
ISO 17299 is shown in Table 1.
Note 2 to entry: See Reference [1] in the Bibliography.
Table 1 — Olfactory threshold concentration
Unpleasant odour Acetic Isovaleric Hydrogen Methyl mer-
Ammonia Nonenal Indole
components acid aicid sulfide captan
Olfactory threshold
1,5 0,006 0,000 078 0,000 08 0,000 41 0,000 07 0,000 3
concentration [μl/l]
3.4
metal-oxide semiconductor sensor
sensor using a metal-oxide semiconductor made of e.g. tin dioxide
Note 1 to entry: The response of sensors corresponds to gas chemical concentration. The blend recipe of the
constituent metal-oxide gives different response trend to chemicals.
3.5
odour test instrument
instrument equipped with multiple metal-oxide semiconductor sensors
Note 1 to entry: This instrument is built up with the inlet of the testing gas, sensors, and cleaning system of sensor
head.
3.6
response value
value obtained as outputs from sensors
3.7
response vector
vector for a quasi unpleasant odour consisting of response value obtained from each sensor separately
3.8
response vector length
length obtained as vector sum which is calculated as square-root of sum of squares of response values
Note 1 to entry: The length represents a proportional amount of chemical concentration.
3.9
calibration curve
curve that determines odour unit concentration corresponding to response vector length
Note 1 to entry: The quadratic curve is used for this calibration curve derived from Reference [2] as proximity.
4 Principle
The quasi unpleasant odour gas is inserted in plastic bags with test specimen or without specimen.
After 2 h reaction time, the odour unit concentration of remained gases is obtained by using an odour
test instrument with 10 metal-oxide semiconductor sensors. The reduction rate in odour chemical
concentration is calculated from the odour unit concentration with and without specimen.
5 Reagents
Unless otherwise specified, analytical grade reagents shall be used in this test.
5.1 Ammonia water, reagent of 28 % in concentration of ammonia (NH ) in water.
5.2 Acetic acid, reagent of 99,7 % in concentration of acetic acid (CH COOH) in water.
5.3 Methyl mercaptan, 100 μl/l in concentration of standard gas by nitrogen dilution.
5.4 Hydrogen sulfide, 100 μl/l in concentration of standard gas by nitrogen dilution.
2 © ISO 2014 – All rights reserved
5.5 Indole, indole (C H N) reagent.
8 7
5.6 Isovaleric acid, 98,0 % solution.
5.7 Nonenal, 2-nonenal (C H O) reagent (95,0 % solution).
9 16
5.8 Diluent gas, dry air obtained from nitrogen - oxygen mixture cylinder with purity of at least
99,999 9 % or, nitrogen gas from nitrogen gas cylinder with purity of at least 99,999 9 %.
6 Apparatus and materials
Unless otherwise specified, the following shall be used in this test.
6.1 Plastic bag, 3 l in capacity with a glass tube as inlet of gas.
6.2 Air pump, with a flow meter or an integrating flow meter for 3 l/min flow rate.
6.3 Oven, capable of operating at 80 °C.
6.4 Micro-syringe, with a capacity of 10 μl.
6.5 Syringe, with a capacity of 200 ml.
6.6 Detector tube, with a concentration measurement range of 50 μl/l to 500 μl/l for ammonia.
6.7 Heat seal, capable of sealing a plastic bag.
6.8 Aspirator or vacuum pump.
6.9 Odour test instrument, with 10 metal-oxide semiconductor sensors.
7 Preparation of the odour test gas
The odour test gases are prepared just before the test. Master gases and the quasi unpleasant odours
may be prepared by permeator or gas cylinder.
7.1 Master gas
7.1.1 Clean 3 l of plastic bags (6.1) by using the diluent gas, then the preparation of master gases of
odour component chemicals is as described in 7.1.2 to 7.1.4.
7.1.2 Ammonia, acetic acid, isovaleric acid, and nonenal
7.1.2.1 Inject 2,5 l of the diluent gas into the plastic bags (7.1.1).
7.1.2.2 Inject the
...
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