显微红外光谱法检测实验室矿物固床降解体系中的可降解微塑料  

Detection of Degradable Microplastics in Laboratory Mineral Solid Bed Degradation System by Micro FTIR

作　　者：朱莹莹 张宁 马科锋 周淑美 黄荣 ZHU Yingying;ZHANG Ning;MA Kefeng;ZHOU Shumei;HUANG Rong(Zhejiang Fangyuan Test Group Co.,Ltd.,Hangzhou 310018,China)

机构地区：[1]浙江方圆检测集团股份有限公司,浙江杭州310018

出　　处：《塑料工业》2023年第2期107-111,132,共6页China Plastics Industry

基　　金：2021年度浙江省市场监督管理局科技计划项目(ZC2021A031)。

摘　　要：建立了利用显微红外光谱仪检测实验室矿物固床降解体系中的可降解微塑料方法。采用乙醇-水-K_(2)CO_(3)溶液三步连续浮选结合溢出法的方式对降解体系中的微塑料进行浮选,聚碳酸酯滤膜进行过滤及分离,进一步采用傅立叶变换显微红外光谱仪结合放大显微镜进行定性及定量分析,计算微塑料含量。分别对三种可降解微塑料的不同粒径尺寸水平进行加标回收,回收率在70.8%~100%之间。A method for detecting degradable microplastics in laboratory mineral solid bed degradation system by using micro Fourier transform infrared spectroscopy(FTIR)was established.The microplastics in the degradation system were floated by three-step continuous flotation of ethanol-H_(2)O-K_(2)CO_(3)solution combined with overflow method,and polycarbonate filter membrane was used for filtration and separation.Furthermore,the content of microplastics was calculated by qualitative and quantitative analysis by micro FTIR and magnifying microscope.Under the optimized conditions,the spike recovery of three degradable microplastics with different size was between 70.8%-100%.

关 键 词：可生物降解塑料 微塑料检测 浮选 显微红外光谱 

分 类 号：TQ317.2[化学工程—高聚物工业]