A spectrophotometric method for the determination of copper ions and its application to the co-precipitation of copper in the crystallization of sodium |
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| Authors: | Glasner A Sarig S Weiss D Zidon M |
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| Institution: | Department of Inorganic and Analytical Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel. |
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| Abstract: | The molar absorptivity of the cyanide complexes Cu(CN)(3)](2-) and Cu(CN)(4)](3-), at their isosbestic wavelength (235 nm) is 1.13 x 10(3) l.mole(-1)mm.(-1) and can be used for the quantitative determination of micro-amounts of copper in the ppm range. The determination of 1-10 mug of Cu(2+) per g of NaCl, or 0.25-2.5 mug ml , is described in detail. The co-precipitation of copper with NaCl crystallizing from aqueous solutions has been studied by this method. |
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