Kinetic spectrophotometric method for the determination of trace amounts of oxalate by an activation effect

被引:13
|
作者
Chamjangali, MA [1 ]
Keley, V [1 ]
Bagherian, G [1 ]
机构
[1] Shahrood Univ Technol, Coll Chem, Shahrood 36155, Iran
关键词
D O I
10.2116/analsci.22.333
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A new, simple and inexpensive kinetic catalytic spectrophotometric method for the determination of oxalate is described. The method is based on an activation effect of oxalate on a catalytic effect of iron(II) on the oxidation of iodide by bromate. The reaction is monitored by measuring the absorbance of triiodide ion at lambda(max) = 352 nm. A calibration graph was obtained from 0.10 - 7.0 mu g cm(-3) of oxalate with a detection limit of 0.080 mu g cm(-3). The standard deviations for ten replicate determinations of 0.50, 1.0 and 5.0 mu g cm(-3) of oxalate were 4.0, 2.6 and 1.8%, respectively. The applicability of the method was demonstrated by the determination of oxalate ion in real samples.
引用
收藏
页码:333 / 336
页数:4
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