CAJ | 학술논문

建立单颗粒-电感耦合等离子体质谱法( SP-ICP-MS)测定稀溶液中纳米银颗粒粒度分布及纳米银颗粒数量浓度的方法。当停留时间为3 ms时,两个或多个纳米银颗粒同时进入检测器的可能性降至最低。采用5倍标准偏差迭代算法(5σ)区分纳米银颗粒信号和背景信号。采用SP-ICP-MS法测定3种商品级纳米银颗粒(30,50和100 nm)粒度分布和纳米颗粒浓度。结果表明：SP-ICP-MS法测定纳米银颗粒结果与纳米银的TEM值相近,可采用SP-ICP-MS法表征纳米银颗粒。本方法测定稀溶液中纳米银颗粒粒度检出限为25 nm,纳米银颗粒浓度检出限约为8×104个/L。将纳米银颗粒加入到自来水样品中并进行测定,获得相近的纳米银粒度分布及纳米颗粒浓度。本方法简单、快捷、灵敏度高,可为研究水环境中纳米银的风险评估提供可靠分析方法,并为饮用水中纳米银的监测提供分析技术。
건립단과립-전감우합등리자체질보법( SP-ICP-MS)측정희용액중납미은과립립도분포급납미은과립수량농도적방법。당정류시간위3 ms시,량개혹다개납미은과립동시진입검측기적가능성강지최저。채용5배표준편차질대산법(5σ)구분납미은과립신호화배경신호。채용SP-ICP-MS법측정3충상품급납미은과립(30,50화100 nm)립도분포화납미과립농도。결과표명：SP-ICP-MS법측정납미은과립결과여납미은적TEM치상근,가채용SP-ICP-MS법표정납미은과립。본방법측정희용액중납미은과립립도검출한위25 nm,납미은과립농도검출한약위8×104개/L。장납미은과립가입도자래수양품중병진행측정,획득상근적납미은립도분포급납미과립농도。본방법간단、쾌첩、령민도고,가위연구수배경중납미은적풍험평고제공가고분석방법,병위음용수중납미은적감측제공분석기술。
Asingleparticle-inductivelycoupledplasmamassspectrometric(SP-ICP-MS)methodwas established to detect the size distribution and number concentrations of silver nanoparticle ( AgNPs) in dilute aqueous solution. The optimal dwell time was 3 ms to reduce possibility of two or more particles entering into detector simultaneously. An iterative algorithm was applied to distinguish AgNPs as outliers from baseline and dissolved metal ion signal if the measured intensity was beyond five time standard deviation of whole data. Size distribution and number concentration of three commercial silver nanoparticle dispersions ( nominal diameters of 30, 50, 100 nm) were determined using SP-ICP-MS. The result of SP-ICP-MS is accurately similar to the transmission electron microscopy ( TEM) , indicating that SP-ICP-MS is able to size silver nanoparticles. The particle size detection limit is 25 nm and the limit of number concentration is 8 × 104 particles/L in dilute solution. Tap water added with silver nanoparticle was tested to obtain a similar size distribution and number concentration. This method is simple, fast and highly sensitive, which can be used to investigate risk assessment of silver nanoparticle in aqueous environment and monitor silver nanoparticle in drinking water.