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- W2385187396 abstract "Based on the chromogenic reaction of copper(Ⅱ)with the sodium pyrrolidine-1-carbodithioate to form a stable yellow complex(1∶2)in the presence of emulsifier OP and in the medium of NH4Cl-NH3·H2O buffer at pH 7.0-10.0,a new spectrophotometric method for the determination of copper(Ⅱ)is proposed.The maximum absorption wavelength of the complex is 438 nm at room temperature.The optimum conditions such as acidity,dosage of sodium pyrrolidine-1-carbodithioate solution and emulsifier OP solution,and reaction time for the system were studied in detail.Beer's law was obeyed in the range of 0-70 μg in 25 mL solution with the apparent molar absorptivity of 1.33×104 L·mol-1·cm-1.Interferences of coexisting ions have bigger allowable amount.The proposed method has been applied to the determination of copper in pure aluminum and alloy samples,and the results conform to the certified values with the relative standard deviations of less than 3%." @default.
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- W2385187396 date "2007-01-01" @default.
- W2385187396 modified "2023-10-06" @default.
- W2385187396 title "Spectrophotometric determination of trace copper(II) in alloy with sodium pyrrolidine-1-carbodithioate-emulsifier OP system" @default.
- W2385187396 hasPublicationYear "2007" @default.
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