基于单颗粒电感耦合等离子体质谱法研究含纳米银纺织品中银释放行为  

Study on Silver Species Released from Silver Nanotextiles by Single Particle Inductively Coupled Plasma-Mass Spectrometry

作　　者：高雅[1,2] 葛秀杰 陈岚 刘忍肖[1] 郭玉婷[1] 葛广路[1] GAO Ya;GE Xiu-Jie;CHEN Lan;LIU Ren-Xiao;GUO Yu-Ting;GE Guang-Lu(CAS Key Lab of Standardization and Measurement for Nanotechnology,CAS Center for Excellence in Nanoscience,National Center for Nanoscience and Technology,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院纳米标准与检测重点实验室,中国科学院纳米科学卓越创新中心,国家纳米科学中心,北京100190 [2]中国科学院大学,北京100049

出　　处：《分析化学》2021年第2期271-281,共11页Chinese Journal of Analytical Chemistry

基　　金：国家重点研发计划项目(Nos.2017YFF0210003,2016YFA0200904)资助。

摘　　要：利用单颗粒电感耦合等离子体质谱法(Single-particle ICP-MS)研究含纳米银颗粒(AgNPs)纺织品中银的释放行为,系统考察提取液和稀释对测量结果的影响。结果表明,含AgNPs纺织品可同时释放AgNPs和银离子(Ag+),但在模拟汗液和水中的释放行为存在显著差异。在模拟汗液中释放的AgNPs较水中尺寸更大,Ag+浓度更高、Ag+释放量随时间延长而增加。在以不同倍数稀释释放液时,检测到的AgNPs的尺寸不同,相差可达数倍,且随稀释倍数的增加而逐渐减小,最终趋于不变,这是由于纳米颗粒在释放过程中的团聚-解聚行为所致。采用spICP-MS测得的最终解聚后的单颗粒AgNPs尺寸与SEM测量尺寸相当,为解聚后的单个AgNPs尺寸。研究结果表明,在采用spICP-MS测定基质中AgNPs时,样品提取和稀释条件(包括取样、提取液、稀释倍数等)对结果影响显著,因此有必要发展规范的样品释放检测分析流程,保障结果的准确性、可比性。本方法对AgNPs尺寸检出限为16 nm,颗粒浓度检出限为2.06×106 particle/L,Ag+浓度检出限为0.003μg/L,在模拟汗液和水中的AgNPs浓度加标回收率分别为98.7%和98.9%,Ag+浓度加标回收率分别为105.8%和101.7%。Single particle inductively coupled plasma-mass spectrometry(spICP-MS)was used to study the release behavior of silver from silver nanotextiles,and the effect of extraction and dilution on the release was systematically investigated.The results showed that the silver nanotextiles coild released both silver nanoparticles and silver ions synchronously,but the release behavior in sweat simulant and water was significantly different.The AgNPs released in sweat simulant were larger in size,higher in silver ions concentration than those in water,and the amount of the released silver ions increased with time.More meaningfully,when the extraction solution was diluted with different multiple,the detected AgNPs showed different sizes,where the difference between the larger and small ones could reach several times,and gradually decreased with the increase of the dilution times until the particle size did not decrease further,which was believed to be caused by the depolymerization of particle aggregates during the extraction process.The size of the smallest particles measured by spICP-MS was similar to that measured by SEM.This study showed that the sample preparation and test conditions(including sampling,extraction liquid,dilution etc.)had a significant impact on the results measured by spICP-MS.Therefore,it was necessary to develop a standardized sample release detection and analysis process to ensure the accuracy and consistency of the results.The lower detection limits for particles size and particles concentration of the silver nanoparticles obtained by this method were 16 nm and 2.06×106 particle/L,respectively.While the lower detection limit for Ag+concentration was 0.003μg/L.The spiked recoveries of the number concentration of AgNPs and the Ag+concentration were 98.7%and 105.8%in sweat stimulant,and 98.9%and 101.7%in water,respectively.

关 键 词：含纳米银纺织品 纳米银颗粒 单颗粒电感耦合等离子体质谱 释放 模拟汗液 

分 类 号：TS107[轻工技术与工程—纺织工程] O657.63[轻工技术与工程—纺织科学与工程]