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  • Title: Application of rapid cloud point extraction method for trace cobalt analysis coupled with spectrophotometric determination.
    Author: Wen X, He L, Shi C, Deng Q, Wang J, Zhao X.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2013 Nov; 115():452-6. PubMed ID: 23871970.
    Abstract:
    In this work, the analytical performance of conventional spectrophotometer was improved through the coupling of effective preconcentration method with spectrophotometric determination. Rapidly synergistic cloud point extraction (RS-CPE) was used to pre-concentrate ultra trace cobalt and firstly coupled with spectrophotometric determination. The developed coupling was simple, rapid and efficient. The factors influencing RS-CPE and spectrophotometer were optimized. Under the optimal conditions, the limit of detection (LOD) was 0.6μgL(-1), with sensitivity enhancement factor of 23. The relative standard deviation (RSD) for seven replicate measurements of 50μgL(-1) of cobalt was 4.3%. The recoveries for the spiked samples were in the acceptable range of 93.8-105%.
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