M. Gautam, R. Bansal, B. Puri
Oct 1, 1981
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0
Influential Citations
17
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Journal
Bulletin of the Chemical Society of Japan
Abstract
Potassium morpholine-4-carbodithioate has been examined as a reagent for the spectrophotometric determination of copper, cobalt, nickel and tellurium after extraction into molten naphthalene. The extracted mixture of metal complex and naphthalene was dissolved in chloroform and the trace amounts of these metals determined spectrophotometrically. Beer’s law holds in the concentration range Cu: 5.0–70.0, Co: 5.0–81.0, Ni: 6.0–90.0, and Te: 5.7–125.0 μg per 10 ml of the final solution. The molar absorptivity and sensitivity are calculated to be Cu: 1.067×104 mol−1 cm−1, 0.0059 μg/cm2 (440 nm), Co: 1.350×104 mol−1 cm−1, 0.0043 μg/cm2 (360 nm), Ni: 7.920×103 mol−1 cm−1, 0.0088 μg/cm2 (390 nm), and Te: 1.075×104 mol−1 cm−1, 0.0110 μg/cm2 (415 nm). Aliquots containing 25.0 μg of copper, 27.0 μg of cobalt, 24.0 μg of nickel and 25.5 μg of tellurium gave a mean absorbance of 0.420, 0.620, 0.270, and 0.215 with a relative standard deviation of 0.0016, 0.0024, 0.0015, and 0.0013 respectively. The interference of var...