Solid Phase Spectrophotometric Microdetermination of Copper
- 1 July 1991
- journal article
- spectrometry
- Published by Taylor & Francis in Analytical Letters
- Vol. 24 (7) , 1201-1217
- https://doi.org/10.1080/00032719108052964
Abstract
A method for the determination of microgram per litre level of copper has been developed, based on Solid-Phase Spectrophotometry (SPS). Copper reacts with bichinconinic acid to form a 1:2 anionic reddish purple of Cu(I), which is fixed on a dextran-type anion-exchange resin. Resin phase absorbance is measured directly and allows for the determination of copper within the range of 1–20 μg. 1−1, using a 2,000 ml sample with an RSD of 1.7%. The method has been used in the determination of copper in natural waters.Keywords
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