Indoor Environment Testing

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Odor Evaluation

With the acceleration of urbanization and the increasing environmental awareness of residents, odor pollution in indoor environments has become a prominent concern. The main cause of indoor odor pollution is the release of odorous substances from various building materials. However, controlling products solely based on hazardous substance content is unable to effectively address the issue of indoor odor pollution, making sensory evaluation equally important. In recent years, the odor attributes of building materials have gradually gained consumer attention, leading to a growing demand for product odor evaluation and classification.

Currently, the industry faces challenges regarding the precision and reproducibility of odor evaluations for building materials. These issues primarily stem from outdated methodologies, inadequate or incomplete training of odor assessors, and environmental factors.

Since its establishment, the CTC Odor Evaluation Laboratory has maintained close communication and collaboration with domestic and international odor-related laboratories and research institutions. We have cultivated a team of professional odor assessors and possess state-of-the-art facilities, ensuring the precision and reproducibility of odor evaluation experiments.

Testing Products

Building Materials

Textiles

Leather

Sports Ground Materials

Automotive Interior Materials

Ambient Air

Household Appliances

Household Insecticides

Packaging Materials

Testing Items

Odor Intensity

Odor Concentration

Odor Dissipation Time

Odor Acceptability

Odor Hedonic Tone (Pleasantness)

Odor Threshold (Odorant concentration at detection/recognition)

Odor Polarity Profile

Odor Level / Rating

Odor Type / Descriptor

Odor Purification Efficiency

Deodorization Function

Testing Standards

Building Materials (Adhesives, wall coatings, wood-based panels, wallpapers, thermal insulation materials, putty, fire-retardant coatings, waterproof coatings, carpets, furniture, and various other indoor/outdoor building materials):

GB/T 43353, QB/T 2725, HG/T 4065, ISO 16000-28, QB/T 5447, LY/T 3236, GB/T 44689, LY/T 3413, GB/T 31891, T/CBMF 118.1, T/CBMF 118.2, T/CBMF 118.3, T/CBMF 291, T/CBMF 292, T/CBMF 294, ASTM C1304, ASTM D4339

Textiles (Textile products, ecological textiles):

GB/T 18885, GB 18401

Leather (Leather, synthetic leather):

QB/T 2725, QB/T 5447, T/CBMF 293

Sports Ground Materials (Synthetic sports surfaces and their raw materials, sports flooring):

GB 36246, GB/T 43564, GB/T 43565, GB/T 43566, T/CBMF 121, T/CBMF 245, T/CBMF 244, T/CBMF 259

Automotive Interior Materials (Automotive interior trim, knitted automotive interior fabric and its composites):

VDA 270, GB/T 33276, ISO 12219-7

Ambient Air (Indoor and outdoor air):

ISO 16000-30, T/CBMF 119, GB/T 14675, HJ 1262, HJ 1416, EN 13725, ASTM E679, ASTM E544, VDI 3940

Household Appliances and Products (Air purifiers, washing machines, other household appliances, household insecticides):

ISO 16000-44, GB/T 21551.1, GB/T 21551.3, QB/T 5958, GB/T 28006, GB/T 35773

Service Advantages

For a specific formulated building material product, we can provide analysis of the main odorous substances to help clients modify formulations and reduce product odor.

State-of-the-art facilities: Dynamic dilution olfactometers, initial (raw gas) olfactometers, odor evaluation environmental chambers, gas chromatography-mass spectrometry (GC-MS) systems, temperature & humidity controlled chambers, and specialized odor evaluation laboratories.

Professional Odor Assessor Team: We have a professional odor assessor team that has passed national laboratory odor evaluation assessments and possesses over 5 years of experience conducting odor evaluation tests.

Standard Development: Responsible for leading the development of one national standard and multiple group standards, including “Determination of Odor Release from Building Products – Test Chamber Method”, “Odor Evaluation Method for Coating Products”, “Odor Evaluation Method for Building Products – Part 1: Odor Intensity”, “Odor Evaluation Method for Building Products – Part 2: Odor Concentration”, “Odor Evaluation Method for Building Products – Part 3: Odor Threshold of Odorous Substances”, “Method for the Selection and Training of Odor Assessors”, “Technical Conditions for the Construction of Odor Evaluation Laboratories in the Building Materials Industry”, and “Odor Evaluation Method for Indoor Air”.