Citation: ZHANG Chun-Mei, XU Qiang, DU Jing, TIAN Jia-Shen, ZHANG Hua. Determination of Silver Nanoparticles in Seawater by Single Particle-Inductively Coupled Plasma-Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(9): 1260-1267. doi: 10.19756/j.issn.0253-3820.201244 shu

Determination of Silver Nanoparticles in Seawater by Single Particle-Inductively Coupled Plasma-Mass Spectrometry

1.
College of Chemical Engineering, Dalian University of Technology, Dalian 116023, China;
2.
Liaoning Ocean and Fisheries Science Research Institute, Dalian 116023, China

Received Date: 29 April 2020
Revised Date: 22 June 2020

Fund Project: This work was supported by the Dalian University of Technology Large-scale Precise Device Test and Repair Fund (No. SYSWX201906) and the Key Laboratory of Huanghuai Water Environment and Pollution Control, Ministry of Education, China (No. KFJJ-2017-11).

A method for quantifying and characterizing the concentration of silver nanoparticles (AgNPs) in seawater by single-particle inductively coupled plasma-mass spectrometry (SP-ICP-MS) was developed. The optimal residence time of SP-ICP-MS for detection of AgNPs was investigated. The influence of sea water matrix on detection of AgNPs was investigated, and the dilution ratio of sea water samples was determined. The results showed that the optimal dwell time of the instrument was 100 μs, and 150 times dilution of seawater could improve the accuracy of the determination of the concentration of AgNPs. The detection limit of the quantity concentration of AgNPs in seawater samples was 9.75×10³ particles/mL, the detection limit of particle size was 12 nm, and the average recoveries of AgNPs with nominal particle sizes of 50 nm and 100 nm were above 70%. AgNPs were detected in the surface seawater samples of Dalian coastal waters. The maximum concentration was (2.1±0.004)×10⁶ particles/mL, the minimum concentration was (1.1±0.01)×10⁵ particles/mL, and the average particle size distribution was between 18 and 200 nm. This method showed many advantages including simple sample preparation, fast analysis speed and low detection limit of particle quantity and concentration. It provided a reliable analysis method for the monitoring and analysis of AgNPs in coastal seawater.
- Single particle-inductively coupled plasma-mass spectrometry,
- Seawater,
- Silver nanoparticles
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1.
沈阳化工大学材料科学与工程学院沈阳 110142