纯棉织物中五种重金属元素的动态微波辅助滤取检测技术  

Determination of five heavy metals contents in cotton fabrics by dynamic microwave-assisted leaching technology

作　　者：张萍 丁兰[2] ZHANG Ping;DING Lan(Center of Quality Analysis and Test,Marine Biomedical Research Institute of Qingdao,Qingdao 266075,China;College of Chemistry,Jilin University,Changchun 130012,China)

机构地区：[1]青岛海洋生物医药研究院质量分析与测试中心,山东青岛266075 [2]吉林大学化学学院,吉林长春130012

出　　处：《印染》2023年第1期62-65,78,共5页China Dyeing and Finishing

基　　金：吉林省自然基金(20220101061JC)。

摘　　要：建立一种操作简便、快速准确的预处理方法,对纯棉纺织品中五种重金属元素(Cd、Cr、Cu、Ni和Pb)含量进行检测。该方法基于多通量动态微波辅助滤取技术,采用稀硝酸作为滤取剂;滤取液稀释1倍后采用ICP-OES进行检测。优化了动态微波辅助滤取条件,即:微波功率为375 W,采用体积分数20%的稀硝酸作为滤取剂,接收体积为20 mL,流速为1 mL/min。5种元素的检出限在0.0009~0.0030μg/mL。精密度RSD在1.4%~5.2%,滤取率为73.7%~97.4%。将方法应用于6种纯棉纺织品,所得结果与标准方法基本一致。A simple and fast pretreatment method is developed for the determination of the contents of five heavy metal elements(Cd,Cr,Cu,Ni,Pb)in pure cotton textiles.The method is based on the technology of multi-throughput dynamic microwave-assisted leaching.The dilute nitric acid is selected as the leaching reagent and the obtained leachate can be directly used for ICP-OES detection after simple dilution process.The experimental conditions of dynamic microwave-assisted leaching are optimized:microwave power is 375 W,dilute nitric acid(20%)is used as the leaching reagent,volume of receiving leaching reagent is 20 mL,flow rate of leaching reagent is 1 mL/min.The limits of detection for the five heavy metals are in the range of 0.0009-0.0030μg/mL.The precision of the method is from 1.4% to 5.2%,and the filtration rate ranged from 73.7% to 97.4%.The method is applied to pure cotton textile samples and the obtained results are compatible with standard method.

关 键 词：测试 动态微波辅助滤取 预处理 重金属 棉织物 

分 类 号：TS197[轻工技术与工程—纺织化学与染整工程]