6-Chloro-3-hydrox y-2- [2 '-(5 '-methylfuryl)]-4<i>H</i>-chromen-4-one as an analytical reagent for the spectrophotometric determination of tungsten(VI)
IR@NISCAIR: CSIR-NISCAIR, New Delhi - ONLINE PERIODICALS REPOSITORY (NOPR)
View Archive Info| Field | Value | |
| Creator |
Agnihotri, R
Agnihotri, N Mehta, J R |
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| Date |
2013-07-23T11:09:55Z
2013-07-23T11:09:55Z 2006-07 |
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| Identifier |
0975-0975(Online); 0376-4710(Print)
http://hdl.handle.net/123456789/20017 |
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| Description |
1655-1658
A 1:2 light yellow complex of tungsten (VI) is formed with 6-chloro-3-hydroxy-2 –[2'-(5'-methylfuryl)]<i>-</i>4<i>H </i>-chromen-4-one (CHMFC) in 0.18-0.32 <i>M </i>HClO<sub>4</sub> medium. The complex is extractable into chloroform and absorbs maximally at 4:15 nm. The absorbance remains constant for more than 1 h with molar absorptivity, detection limit and Sandell’s sensitivity as 2.16×10<sup>4</sup> L mol<sup>-1</sup> cm<sup>-1</sup>, 0.131μg mL<sup>-1</sup> and 0.0085 μg W cm<sup>-2</sup>, respectively. Beer's law is obeyed in the concentration range of 0-2.6 μg W mL<sup>-1</sup> the correlation coefficient is, <i>r</i>=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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| Language |
en_US
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| Publisher |
NISCAIR-CSIR, India
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| Relation |
Int. Cl.<sup>8</sup> G01N21/00; G01N33/20
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| Rights |
<img src='http://nopr.niscair.res.in/image/cc-license-sml.png'> <a href='http://creativecommons.org/licenses/by-nc-nd/2.5/in' target='_blank'>CC Attribution-Noncommercial-No Derivative Works 2.5 India</a>
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| Source |
IJC-A Vol.45A(07) [July 2006]
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| Title |
6-Chloro-3-hydrox y-2- [2 '-(5 '-methylfuryl)]-4<i>H</i>-chromen-4-one as an analytical reagent for the spectrophotometric determination of tungsten(VI)
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| Type |
Article
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