T/CNGA 70-2024 Active Group standards

T/CNGA 70-2024 Demonstration of and evaluation of the odor of down feathers using wet-spike stimulation method

Publish Date: 2024-09-29 Implement Date: 2024-09-29 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/CNGA 70-2024

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Textile auxiliary materials

Publish Date: 2024-09-29

Implement Date: 2024-09-29

Scope

Scope: This document describes the methods for detecting and evaluating the odor of down and feathers using the wet-state stimulation sensory test method and the wet-state stimulation headspace/gas chromatography-mass spectrometry method. This document is applicable to the detection and evaluation of the odor of down and feathers, as well as down and feathers filled in products. Main technical content: 3. Terms and definitions The following terms and definitions are applicable to this document. 3.1 Odor threshold value: The minimum concentration value at which half of the odor testers can detect the presence of odor. Note: The odor threshold value of the detection substance in the standard is shown in Appendix B. 3.2 Odor activity value (OAV): The ratio of the absolute concentration (C) of the odorant to its sensory threshold value (T). 3.3 Relative odor activity value (ROAV): The percentage of the odor activity value of a substance in a sample to the highest odor activity value component in the sample. 3.4 Composite odor index (N): A value used to reflect the comprehensive odor intensity perceived by humans in a sample. The smaller the value, the weaker the odor intensity. 4. Principles 4.1 Principle of sensory test method The down and feathers are sewn into a flannel bag as fillings and placed in a sealed environment. After appropriate temperature and humidity adjustment, the wet-state stimulation process is carried out to evaluate the odor intensity through human olfactory sensory perception. 4.2 Principle of headspace/gas chromatography-mass spectrometry method The down and feathers are placed in a headspace bottle and subjected to appropriate temperature and humidity adjustment for the wet-state stimulation process to allow gas volatilization to reach equilibrium. The volatile gas components are qualitatively and quantitatively analyzed by a headspace gas chromatograph-mass spectrometer. Combined with the odor threshold value, the odor of the down and feather s