In this paper,the odour intensity of a wool carpet and its raw materials was tested,and it was found that the odour intensity of carpet glue and yarn contributed the most.Qualitative and quantitative analysis of total volatile organic compounds was carried out on the finished carpet and its raw materials by thermal desorption gas chromatography-mass spectrometry,and then the odour activity value was calculated based on the odour threshold of the released substances.Substances contributing to the overall odour of finished carpets include nonanal,octanal,dodecanoic acid,decanal,myristic acid,hexanal,pentadecanoic acid,and butyl acetate.Among them,nonanal,decanal,and hexanal are primarily derived from aldehyde monomer residues during carpet glue synthesis.Butyl acetate is used as a solvent for carpet glue.Dodecanoic acid,myristic acid,and pentadecanoic acid originate from ingredients such as organophosphorus pesticides used to mothproof the yarn.The yarn material itself has strong adsorption,absorbing aldehyde pollutants in the environment,resulting in some of the aldehydes in the finished carpet coming from the yarn.Using the total odour activity value method,the odour contribution rate order of raw material pollutants is:carpet glue＞yam＞white cloth＞mesh cloth＞green cloth.The main source of odour pollutants is carpet glue,accounting for about 70％of all pollutants.
a wool carpet and its raw materialsodour intensityodour activity
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