Trace Analysis of Metals Using Naphthalene Part I Spectrophotometric Determination of Cobalt after Extraction of Its Chinoform Complex with Molten Naphthalene
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概要
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A new method is described for naphthalene extraction andspectrophotometric determination of trace cobalt with chinoform.The method is based on the formation of the colored complex whichis extractable with molten naphthalene and on the dissolution ofthe extract in dimethylformamide. This solution follows Beer'slaw at 428 nm over the range of 3-43 μg of cobalt per 10 ml ofdimethylformamide. The color of the complex is stable for 90min. The various factors such as pH, amounts of reagent andnaphthalene, digestion and shaking time are studied, and the molarabsorptivity and relative standard deviation are estimated. Theextraction of the complex into molten naphthalene is rapidly completedby contact with molten naphthalene or by slight shaking
- 福井大学工学部の論文
福井大学工学部 | 論文
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