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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.13 [2006] >
IJCT Vol.13(1) [January 2006] >
| Title: | Spectrophotometric determination of arsenic in environmental and biological samples |
| Authors: | Narayana, B
Cherian, Tom
Mathew, Mendalin
Pasha, Chand |
| Keywords: | Arsenic
Spectrophotometry
Iodate
Variamine blue |
| Issue Date: | Jan-2006 |
| Publisher: | CSIR |
| IPC Code: | Int. Cl.7 G01J3/00 |
| Abstract: | A simple and sensitive spectrophotometric method has been developed for the determination of arsenic using variamine blue as a chromogenic reagent. The method is based on the reaction of arsenic(III) with potassium iodate in acid medium to liberate iodine, which oxidizes variamine blue to form a violet coloured species having an absorption maximum at 556 nm. Beer’s law is obeyed in the range 0.2-14 μg mL-1 of As(III). The molar absorptivity, Sandell’s sensitivity, detection limit and quantitation limit were found to be 1.43 104 L mol-1cm-1, 5.2610-2 μg cm-2, 0.022 and 0.072 μg mL-1, respectively. The optimum reaction conditions and other analytical parameters were evaluated. The proposed method has been successfully applied for the determination of arsenic in various environmental and biological samples. |
| Page(s): | 36-40 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.13(1) [January 2006]
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