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Photometric estimation of uranium in sea water based on extraction

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Title Photometric estimation of uranium in sea water based on extraction
 
Creator Babu, S Kanna
Satyanarayana, D
Muralikrishna, U
 
Description 16-19
Uranium forms an intensely red coloured (λmax=560 nm)complex with PAN,1-(2-pyridylazo)2-naphthol, at pH 8-10 which can be extracted quantitatively into 1,2-dichloroethane in a single extraction step. The interference of several metal ions present in sea water such as Be(ii), Mn(ii), Fe(iii), Co(ii), Ni(ii), Cu(ii), Zn(ii), Mo(Vi), Hg(ii), Th(iv), Y(iii) and lanthanides can be effectively masked by the addition of 1,2-diamino cyclohexane tetraacetic acid (CDTA).The red colour of the complex in the organic phase is fairly stable and obeys Beer's law up to 10 µg of uranium/litre, the molar extinction coefficient and sensitivity of the colour reaction being 24,000 and 0.01 µg cm-2 respectively. The method has been applied for the estimation of uranium in coastal waters of Bay of Bengal around Visakhapatnam and the average concentration is found to be 3.6 µg/litre with a standard deviation of 0.03. The composition of the extracted species, and the conditional stability constants of the uranium-PAN complex are evaluated. The proposed method is simple, sensitive, selective and fairly reproducible for the estimation of uranium in sea water.
 
Date 2016-12-21T10:06:29Z
2016-12-21T10:06:29Z
1981-03
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/39034
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.10(1) [March 1981]