Citation: LI Jing-Xi, SUN Cheng-Jun, ZHENG Li, JIANG Feng-Hua, YIN Xiao-Fei, CHEN Jun-Hui, WANG Xiao-Ru. Determination of Lead Species in Algae by Capillary Electrophoresis-Inductively Coupled Plasma-Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(11): 1659-1664. doi: 10.11895/j.issn.0253-3820.160516 shu

Determination of Lead Species in Algae by Capillary Electrophoresis-Inductively Coupled Plasma-Mass Spectrometry

1.
Marine Ecology Research Center, First Institute of Oceanography of State Oceanic Administration, Qingdao 266061, China;
2.
Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China

Received Date: 6 July 2016
Revised Date: 1 September 2016

A method of capillary electrophoresis (CE) combined with inductively coupled plasma-mass spectrometry (ICP-MS) was established for the determination of lead ion (Pb), trimethyl lead (TML) and triethyl lead (TEL). Meanwhile, the extraction technology of different species of lead in algae was established and optimized for the qualitative and quantitative analysis. The results showed that three kinds of lead compounds could be effectively separated within 20 min by CE-ICP-MS with 70 mmol/L H₃BO₃-17.5 mmol/L Na₂B₄O₇ (pH 8.90) as a buffer solution. There was a good reproducibility of migration time (RSD<4%) and peak area (RSD<5%). Three kinds of lead compounds had good linear relationship within 10-200 μg/L with the correlation coefficient larger than 0.90. The detection limits of Pb, TML and TEL (S/N=3, Pb) were 0.091, 0.023 and 0.030 μg/L, respectively. The extraction rate of Pb reached more than 80% by using fractional extraction, and the recovery rates of Pb, TML and TEL were 103.6%, 95.7% and 90.6%, respectively, with algae as the substrate. The lead content detection of laver and kelp showed that Pb in algae mainly existed in the form of Pb. The method had the advantages of siplicity, high efficiency and low sample consumption, which could provide technical support for the quality control of marine algae and other marine products.
- Lead species analysis,
- Capillary electrophoresis,
- Inductively coupled plasma-mass spectrometry,
- Lead,
- Marine algae
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沈阳化工大学材料科学与工程学院沈阳 110142