HPLC determination of oxalic acid using tris(1,10-phenanthroline)ruthenium(II) chemiluminescence - application to the analysis of spinach

被引：41
|
作者：
Wu, FW [1 ]
He, ZK [1 ]
Luo, QY [1 ]
Zeng, YE [1 ]
机构：
[1] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China
来源：
FOOD CHEMISTRY | 1999年 / 65卷 / 04期
关键词：
chemiluminescence; oxalic acid; spinach; Ru(phen)(3)(2+); HPLC;
D O I：
10.1016/S0308-8146(98)00223-4
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The chemiluminescence (CL) of Ru(phen)(3)(2+) was applied to HPLC determination of oxalic acid. Oxalic acid was separated by a C-18 reverse-phase column with a mobile phase of 0.02 mol/l NH4Ac. The eluted oxalic acid was mixed with 0.25 mol/l Ru(phen)(3)(2+) and 2.0 mmol/l Ce(SO4)(2) in 0.08 mol/l H2SO4, and then pass through a modified luminometer used as a detector. The reaction of Ce(IV) oxidized Ru(phen)(3)(2+) and oxalic acid emitted light. The detection limit was 6.2 x 10(-6) mol/l for oxalic acid at a S/N ratio of 3, the relative standard deviation for 5 replicate injections of 1 x 10(-3) mol/l oxalic acid standard was calculated as 5.6%, and the linear calibration range was 1 x 10(-5) to 4 x 10(-3) mol/l. The method was successfully applied to determination of oxalic acid in spinach. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：543 / 546
页数：4
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