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Citation: WANG Jing-Ru, CHAO Jing-Bo, LU Da-Wei, LI Xiu-Cheng. Dispersion and Detection of Titanium Dioxide Nanoparticles Based on Nanoparticle Tracking Analysis[J]. Chinese Journal of Analytical Chemistry, ;2021, 49(4): 538-545. doi: 10.19756/j.issn.0253-3820.211015 shu

Dispersion and Detection of Titanium Dioxide Nanoparticles Based on Nanoparticle Tracking Analysis

1.
Division of Chemical Metrology and Analytical Science, National Institute of Metrology, Beijing 100029, China;
2.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

Corresponding author: CHAO Jing-Bo, chaojb@nim.ac.cn
Received Date: 7 January 2021
Revised Date: 19 February 2021

Fund Project: Supported by the National Key Research and Development Project (No.2017YFF0205801) and the National Institute of Metrology Fundamental Research Program (No.21-AKYS1609).

Based on nanoparticle tracking analysis (NTA) techinque, a dispersion and detection method for titanium dioxide nanoparticles was developed. Influencing parameters on dispersion such as reagent type, ultrasonic method, ultrasonic time, ultrasonic temperature, dispersion reagent concentration and pH value were investigated. The dispersion method had good universality for commercial titanium dioxide nanoparticles. NTA was used to measure particle size and particle number concentration, and the dilution reagent concentration and dilution factor during the detection process were optimized. The results of particle number concentration and size using NTA by the established dispersion method was verified using single particle-inductively coupled plasma-mass spectrometry (SP-ICPMS) and dynamic light scattering (DLS) techniques, and the deviations were ±10% and ±5%, respectively. By using the developed dispersion and detection methods, the sample could maintain stable up to over a month, which coud be used for the development of basic research and related detection methods.
- Titanium dioxide nanoparticles,
- Dispersion,
- Particle number concentration,
- Stability,
- Nanoparticle tracking analysis
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