A Rapid Spectrophotometric Method for Trace Determination of Copper in Milk
| Main Authors: | SUDARSAN BARUA, B. S. GARG, R. P. SINGH, ISHWAR SINGH |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 1983
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/6326688 |
Daftar Isi:
- Department of Chemistry, University of Delhi, Delhi-110 007 Department of Chemistry, M. D. University, Rohtak-124 001 Manuscript received 10 October 1980, revised 17 April 1982, accepted 28 September 1982 Copper(II) interacts with 4-(2-guinolylazo)phenol (\(p\)-QAP) to give a violet coloured (1 : 3) complex soluble in ethanolic medium. The complex exhibits maximum absorbance at 535 nm in the \(p\)H range 8.0-11.1. The Sandell's sensitivity of the colour reaction is 0.0008 μg/cm2 (ԑ =8.3 x104). The reagent has been found to be fairly selective for the determination of copper(II) in presence of various interfering metal ions. The method has been used for the selective determination of copper in various milk samples.