Journal
TALANTA
Volume 209, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2019.120578
Keywords
Metal ions; On-line complexion; Micelle to solvent stacking; Capillary electrophoresis; Beebread; Dendrobium officinale
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Funding
- National Natural Science Foundation of China [81730108]
- Zhejiang Province Ministry of Science and Technology [2015C03055]
- Key project of Hangzhou Ministry of Science and Technology [20162013A07]
- Hangzhou Social Development of Scientific Research projects [20191203B17]
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A direct on-line complexion combined with micelle to solvent stacking method was proposed for simultaneous determination of metal ions by capillary electrophoresis coupled diode array detector. During the experiment, a plug of complexing agent was first injected to the inlet of capillary, followed by introducing the micelle-bound metal ions. Then the metal ions produced a micelle-to-solvent stacking effect and interacted with the complexing agent under a positive voltage. Continued application of voltage, the analytes were effectively focused and separated in the capillary zone electrophoresis. Repeatability was ranged from 1.89% to 1.94% for the migration time. The detection limits were 2.66-27.9 ng mL(-1) for Ni2+, Co2+, Cu2+ , Hg2+ and Cd2+. Furthermore, the developed method showed a great potential for the determination of metal ions in the crayfish, beebread and Dendrobium officinale samples.
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