WU Lei,ZHANG Xin-tong,LIU Zi-yan,ZHANG Tian-xing,ZHU Qian-wan,LI Qi-yu,QIE Xue-jiao,DU Shan-shan.Identification of Microplastics in Urine by Laser Direct Infrared Spectroscopy[J].Journal of Instrumental Analysis,2025,44(05):804-810.
WU Lei,ZHANG Xin-tong,LIU Zi-yan,ZHANG Tian-xing,ZHU Qian-wan,LI Qi-yu,QIE Xue-jiao,DU Shan-shan.Identification of Microplastics in Urine by Laser Direct Infrared Spectroscopy[J].Journal of Instrumental Analysis,2025,44(05):804-810. DOI: 10.12452/j.fxcsxb.240913397.
Identification of Microplastics in Urine by Laser Direct Infrared Spectroscopy
Agilent 8700 laser direct infrared spectroscopy was used to investigate microplastics in urine from school-aged children and adults in this study. An analytical method for detecting microplastics in human urine was established,and detailed data on the types,quantities,and particle size distribution of microplastics in two age groups were obtained. The results revealed the detection of 304 particles in the urine of 21 school-aged children,primarily consisting of high-density polyethylene,polyvinyl chloride,polyamide,and polyethylene. In contrast,42 particles were detected in the urine of 6 adults,predominantly comprising polyvinyl chloride,polyamide,polyethylene,and polypropylene. Notably,microplastics with small particle sizes(20-70 μm) constituted a high proportion in both sample groups,accounting for 92.0% and 95.2%,respectively. Comparative analysis indicated the widespread presence of microplastics in urine,with distinct differences in quantity and chemical composition between the two groups,which may be related to the children's behavior habits,respiratory and metabolic characteristics,and living environment. This research furnishes crucial insights into the exposure of microplastics within the human body,aiding in the assessment of microplastic risks faced by individuals across different age groups.
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