Citation: FU Liang, SHI Shu-Yun, CHEN Xiao-Qing. Accurate Determination of Trace Toxic Elements in Activated Clay Using Inductively Coupled Plasma Tandem Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(8): 1253-1260. doi: 10.11895/j.issn.0253-3820.181258 shu

Accurate Determination of Trace Toxic Elements in Activated Clay Using Inductively Coupled Plasma Tandem Mass Spectrometry

1.
Collaborative Innovation Center of Green Development for Wuling Mountain Areas, Yangtze Normal University, Fuling 408100, China;
2.
School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China

Received Date: 18 April 2018
Revised Date: 7 June 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 21275163), Chongqing Municipal Science and Technology Frontier and the Application of Basic Research Project (No.cstc2015jcyjA10038) and Scientific and Technological Research Program of Chongqing Municipal Education Commission (No. KJ1601224).

An analytical method was established for accurate determination of trace toxic elements in activated clay by inductively coupled plasma tandem mass spectrometry (ICP-MS/MS) with different digestion processes. The activated clay was digested by microwave and closed pressurized acid, respectively. Eight kinds of toxic elements including Cr, Ni, As, Cd, Sn, Sb, Hg and Pb were measured by ICP-MS/MS. In the MS/MS mode, O₂ and NH₃/He were employed as reaction gases to eliminate the interference during the determination process. The analysis results shown good linearity (R² ≥ 0.9999), and the limit of detection was 0.35-5.20 ng/g. The accuracy and precision of the analytical method were evaluated by the national standard material stream sediment (GBW07306) that is similar to the matrix composition of activated clay. The results shown that the measured values of microwave digestion and closed pressurized acid digestion were in good agreement with the certified values of the standard reference materials with the relative standard deviation (RSD) less than or equal to 5.2%, which proves that the analysis results are accurate, reliable and high precision. The method is considered to be suitable for high-throughput analysis of trace toxic elements in activated clay by advantages of fast analysis, low limit of detection and interference-free.
- Activated clay,
- Inductively coupled plasma tandem mass spectrometry,
- Toxic elements,
- Interference,
- Tandem mass spectrometry mode
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沈阳化工大学材料科学与工程学院沈阳 110142