Functionality evaluation for Textile products: Deodorant test
【Test method for each type】
The testing gas is designated by six categories of odor in the standards of deodorantfinished product by Japan Textile Evaluation Technology Council (JTETC).
Similar international standard: ISO 17299-1,2,3
Category

Testing gas

Sweat odor

Ammonia, Acetic acid, Isovaleric acid

Aging odor

Ammonia, Acetic acid, Isovaleric acid, Nonanal

Excrement odor

Ammonia, Acetic acid, Methyl mercaptan, Hydrogen sulfide, Indole

Cigarette odor

Ammonia, Acetic acid, Acetaldehyde, Pyridine, Hydrogen sulfide

Garbage odor

Ammonia, Methyl mercaptan, Hydrogen sulfide, Trimethylamine

Ammonia odor

Ammonia

Example: If the product says “Deodorant effect (Sweat odor), we carry out 3 types oftests such as Ammonia, Acetic acid, Isovaleric acid.
【Overview】①

Instrument-analysis method

Detector tube
methodGas
chromatography(GC) method

②
1.

2.

1. Place the determined amount of specimen into a 5L plastic bag
and insert 3L of test gas adjusted to the specified concentration.
2. 2 hours later, detect the concentration of residual master gas in theplastic bag.
1. Place the specimen in a 500ml conical flask and insert 5μL of thegas component ethanol solution adjusted to the specified
concentration.
2. After leaving it still for 2 hours, measure the concentration ofresidual gas using the gas chromatogram.

Sensory test
This test is carried out by evaluating according to the actual sense of smell by a human.
With the specimen hanging, insert the odor component standard solution or standard
gas into the conical flask. At the same time, insert standard solution or standard gasfor the standard odor gas into an empty conical flask.
Stir each flask and after leaving it still for 2 hours, compare the standard odor with theodor component on the exposed specimen (=fabric odor) and the odor in the flask(atmospheric odor), as well as the standard odor component gas, and then give thejudgment.

* If the odor intensity exceeds the standard odor component, it will be judged as "strongjudgement". If the odor intensity falls below the standard odor component, it will be judged as"weak judgement." The panelist (judges) will be six people.
Contact regarding
deodorant testJapan
Biochemical Group（Biochemical Lab.）
Tel: +81-3-5875-7271

China
Shanghai Lab.
Tel:+86-21-6040-6388【Evaluation / Reference value】① Instrument analysis passing standard
Gas type

Instrument
analysis type

Passing standard

Exemption standard

Reduction rate: over 70%

Reduction rate: over 80%

Acetic acid

Detector tube
Detector tube

Reduction rate: over 70%

Reduction rate: over 70%

Isovaleric acid

GC

Reduction rate: over 85%

Reduction rate: over 95%

NonanalGC

Reduction rate: over 75%

Reduction rate: over 90%Ammonia

Methyl mercaptan

Detector tube

Reduction rate: over 70%―

Hydrogen sulfide

GC

Reduction rate: over 70%―

IndoleDetector tube
Detector tube
Detector tube

Reduction rate: over 70%―

Reduction rate: over 70%―

Reduction rate: over 70%―

Acetaldehyde
Pyridine② Sensory test passing standard
If 5 out of 6 panelists judge as “weak judgement” for both fabric odor and atmospheric odor,
the result is “pass”.
If the conditions of the exemption standard are met for Ammonia, Acetic acid, Isovaleric acidand Nonanal listed in ①instrument analysis passing standard, conducting sensory test will
be exempt.

【Photocatalytic deodorant test】
JTETC sets the test method and judgement standards and carries out certification forphotocatalytic deodorant finished mark, and Nissenken handles those tests. The
photocatalytic is subject to work under ultraviolet light, and the reduction rate of brightconditions (with UV irradiation) and dark conditions (without UV irradiation) are comparedwith the gas concentration.
【Overview】
Test method (Detector tube method)：
Put the specimen inside a 5L tedlar bag or plastic bag and insert 3L gas adjusted to thespecified concentration (Gas components: ammonia or acetaldehyde) and carry out exposure
test for 24 hours. At this time, if the reduction rate exceeds 70% for either the bright or dark
condition, but the photocatalytic effect falls below 20, a 2nd exposure test will be conductedwith the tested samples.
Certification standard：
For the first exposure test, the reduction rate under light condition or dark condition shall be≧70.0% And "Photocatalytic effect" shall be ≧20.0%.
Or for the first exposure, the reduction rate under light condition or dark condition shall be ≧70.0% and for the second exposure, the "Photocatalytic effect" shall be ≧20.0%.
Calculation method：
A: reduction rate

【Concentration of the residual gas for the blank test under light condition】

under light condition【Concentration of the residual gas for the specimen under light condition】 ×100(%) ＝

【Concentration of the residual gas for the blank test under light condition】

B: reduction rate

【Concentration of the residual gas for the blank test under dark condition】

under dark【Concentration of the residual gas for the specimen under dark condition】 ×100

condition (%) ＝【Concentration of the residual gas for the blank test under light condition】

Photocatalytic effect= A (%) － B (%)
【JTETC SEK mark】

Head office
2-16-11, Kuramae,
Taito-ku, Tokyo,
111-0051 JAPAN
Tel: +81-3-3861-2341

Deodorant effectPhotocatalytic deodorant effect