| Spectrophotometric Determination of Silver in Ceramic
Water Filter Candle Using Dithizone |
S. K. ROY, DIPALI KUNDU AND S. DASGUPTA
Pages : 75-77
DOI : 10.1080/0371750X.1985.10822745 |
| Abstract |
| A spectrophotometric method has been developed for determination
of small amounts of silver dop~d in ceramic water filter candle using
dithizone as a chromogenic reagent. The studies revealed that (i)
the Amax of the Ag2-dithizonate complex Jay at 570 nm, (ii) the
optical density was linear up to 10 ppm of silver, (iii) at pH 10-11
the complex was stable up to 4 hrs, above which it precipitated out,
(iv) the alkaline dithizone solution retained its complexing property
for a period of 6 hrs and (v) interferences due to AI, Fe, Ti etc were
sequistered by adding EDT A and TEA prior to development of
colour. Results obtained with the present method agreed well with
those obtained by atomic absorption spectrophotometry. |
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