Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0308-8146(02)00561-7
Title: Sensitive determination of trace-metal elements in tea with capillary electrophoresis by using chelating agent 4-(2-pyridylazo) resorcinol (PAR)
Authors: Feng, H.
Wang, T.
Li, S.F.Y. 
Keywords: 4-(2-Pyridylazo) resorcinol (PAR)
Capillary electrophoresis
Metals
Tea
Issue Date: Jun-2003
Citation: Feng, H., Wang, T., Li, S.F.Y. (2003-06). Sensitive determination of trace-metal elements in tea with capillary electrophoresis by using chelating agent 4-(2-pyridylazo) resorcinol (PAR). Food Chemistry 81 (4) : 607-611. ScholarBank@NUS Repository. https://doi.org/10.1016/S0308-8146(02)00561-7
Abstract: A capillary electrophoresis method was developed for the determination of trace metals (Cu, Fe, Zn, Co and Ni) in tea based on the conversions of strong complexes between 4-(2-pyridylazo) resorcinol (PAR) and metals. Five metals can be determined in 10 min by a single run. The calibration curves showed a linear range from 50 μg/l to 5 mg/l for these metals with correlation coefficients (r2) being greater than 0.999. Detection limits (S/N=3) of Co, Fe, Cu, Zn and Ni varied from 6 to 30 μg/l. Recoveries of these metal ions ranged from 97.9 to 106.2%. The method is simple and separation time is short. © 2003 Elsevier Science Ltd. All rights reserved.
Source Title: Food Chemistry
URI: http://scholarbank.nus.edu.sg/handle/10635/94790
ISSN: 03088146
DOI: 10.1016/S0308-8146(02)00561-7
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