红外显微光谱法测定生活饮用水中微塑料  

Determination of Microplastics in Drinking Water by Fourier Infrared Microspectroscopy

作　　者：李珊 张岚 邢方潇[1] 陈永艳[1] 岳银玲[1] LI Shan;ZHANG Lan;XING Fangxiao;CHEN Yongyan;YUE Yinling(National Institute of Environmental Health,Chinese Center for Disease Control and Prevention,Beijing 100021,China)

机构地区：[1]中国疾病预防控制中心环境与健康相关产品安全所,北京100021

出　　处：《净水技术》2021年第1期44-48,95,共6页Water Purification Technology

摘　　要：建立生活饮用水中微塑料的红外显微光谱测定方法。5 L水样经不锈钢滤膜过滤,用30%H2O2对滤膜上的物质消解2 d(40℃,24 h;常温,24 h),然后用超纯水在30℃条件下超声洗脱20 min,用银膜过滤洗脱液,用傅里叶红外显微光谱仪ATR成像模式进行定性和定量分析。结果显示,该方法的加标回收率为73.1%~92.0%,RSD为8.7%。该方法样品前处理简便,操作简单,检测时间成本较低,准确度和精密度均较高,可用于生活饮用水中微塑料的检测。A method for the detection of microplastics in drinking water by Fourier infrared microspectroscopy was established.The sample with volume of 5 L was filtered by stainless steel membrane,then was digested on the membrane with 30%H2O2 for 2 days(40℃for 24 h,homoeothermy for 24 h).The membrane was eluted by ultra-pure water while ultrasonic time was set for 20 min and ultrasonic temperature was 30℃.The eluent was filtered through silver membrane which would be qualitatively and quantitatively analyzed by ATR imaging mode of Spotlight-400 imaging system with a Fourier transform infrared microspectrometer.Results showed that recovery rates of standard addition with the method were 73.1%~92.0%,and the RSD was 8.7%.The method has the advantages of simple sample pretreatment,simple operation,low time cost,high accuracy and precision,and can be used for the determination of microplastics in drinking water.

关 键 词：饮用水 微塑料 红外显微光谱仪 

分 类 号：X84[环境科学与工程—环境工程]