Discrimination and Quantification of Soil Nanoparticles by Dual-Analyte Single Particle ICP–QMS
Discrimination and Quantification of Soil Nanoparticles by Dual-Analyte Single Particle ICP–QMS
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通过双分析物单颗粒 ICP™QMS 辨别和定量土壤纳米颗粒
DOI：
10.1021/acs.analchem.2c01379
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发表时间：
2022
影响因子：
7.4
通讯作者：
Rongliang Qiu
中科院分区：
文献类型：
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作者：
Kengbo Ding;Shaoxia Liang;C;ie Xie;Quan Wan;Chao Jin;Shizhong Wang;Ye-Tao Tang;Miaoyue Zhang;Rongliang Qiu
本研究提出了双分析物单粒子电感耦合等离子体四极杆质谱（spICP-QMS）在三种样品（SA、SB和SC）中的两种典型土壤纳米粒子（高岭石和针铁矿纳米粒子，简称KNPs和GNPs）的三种检测事件（Al不配对事件、Fe不配对事件和配对事件）的鉴别和定量的新应用。SA主要由KNPs组成，其浓度为28 443±817粒mL-1，平均粒径为140.7±0.2 nm。SB主要由GNPs组成，其浓度为39 283±702粒mL-1，平均粒径为141.8±2.9粒。在SC中，KNPs和GNPs的浓度分别为22 4541±1401和70 604±1623粒mL-1， KNPs和GNPs的平均粒径分别为140.7±0.2和60.2±0.3 nm。通过峰化实验确定双分析物spICP-QMS的准确性，并与其他技术的测量结果进行比较，分析了不同SA和SB比例和不同SC浓度的样品。结果表明，双分析物spICP-QMS是一种很有前途的方法来区分土壤中不同种类的天然NPs。
This study presents the new application of dual-analyte single particle inductively coupled plasma quadrupole mass spectrometry (spICP-QMS) to the discrimination and quantification of two typical soil nanoparticles (kaolinite and goethite nanoparticles, abbr. KNPs and GNPs) in three samples (SA, SB, and SC) with three detection events (Al unpaired event, Fe unpaired event, and paired event). SA was mainly composed of KNPs with a concentration of 28 443 ± 817 particle mL-1 and a mean particle size of 140.7 ± 0.2 nm. SB was mainly composed of GNPs with a concentration of 39 283 ± 702 particle mL-1 and a mean particle size of 141.8 ± 2.9. In SC, the concentrations of KNPs and GNPs were 22 4541 ± 1401 and 70 604 ± 1623 particle mL-1, respectively, and the mean particle sizes of KNPs and GNPs were 140.7 ± 0.2 and 60.2 ± 0.3 nm, respectively. The accuracy of dual-analyte spICP-QMS was determined by spiking experiments, comparing these results with the measurements of other techniques, analyzing the samples in different SA and SB proportions and in different SC concentrations. Our results demonstrated that the dual-analyte spICP-QMS is a promising approach to distinguishing different kinds of natural NPs in soils.