6-chloro-3-hydroxy-2-[2′-(5′-methylfuryl)]-4H-chromen-4-one as an analytical reagent for the spectrophotometric determination of tungsten(VI)

被引：0
|
作者：
Agnihotri, R. [1 ]
Agnihotri, N. [1 ]
Mehta, J. R. [1 ]
机构：
[1] Kurukshetra Univ, Dept Chem, Kurukshetra 136119, Haryana, India
来源：
INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY | 2006年 / 45卷 / 07期
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中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A 1:2 light yellow complex Of tungsten(VI) is formed with 6-chloro-3-hydroxy-2-[2'-(5'-methylfuryl)]-4H-chromen-4-one (CHMFC) in 0.18-0.32 M HClO4 medium. The complex is extractable into chloroform and absorbs maximally at 435 nm. The absorbance remains constant for more than 1 h with molar absorptivity, detection limit and Sandell's sensitivity as 2.16 x 104 L mol(-1) cm(-1), 0.131 mu g mL(-1) and 0.0085 mu g W cm(-2), respectively. Beer's law is obeyed in the concentration range of 0-2.6 mu g W mL(-1). the correlation coefficient is, r =1.001. Oxalate interferes in the tungsten determination. The method has been satisfactorily applied to the analysis of tungsten in various synthetic and technical samples.
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页码：1655 / 1658
页数：4
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