title: [Extraction of citric acid in multi-matrix by liqid phase microextraction].
abstract: A method for the determination of citric acid in multi-matrix by liquid phase chromatography with liquid phase microextraction (LPME) as sample-preparation technique is introduced. The method integrates extraction, enrichment and clean-up into a single step. It is a very fast, effective and virtually "green" sample-preparation technique, which provided a good linear range (0.7 - 600 microg/mL) with r2 = 0.9995, a low detection limit (0.27 microg/mL, S/N = 3) and a satisfactory relative standard deviation (RSD < 5%).
authors.affiliation: Deportment of Applied Chemistry, East China Instutste of Technology, Fuzhou 344000, China. dingjianh2004@126.com
authors.forename: Jianhua
authors.initials: J
authors.lastname: Ding
authors.forename: Haixia
authors.initials: H
authors.lastname: He
authors.forename: Xinlei
authors.initials: X
authors.lastname: Yang
authors.forename: Mingbiao
authors.initials: M
authors.lastname: Luo
authors.forename: Changfu
authors.initials: C
authors.lastname: Qiu
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Zhao