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Spectrophotometric Determination of Copper and Bismuth After Coprecipitation of Their n-Butylxanthates on Microcrystalline Naphthalene

Bal K. Puri ; Chemistry Department, Indian Institute of Technology, Haus Khas, New Delhi-110016, India
A. K. Gupta ; Chemistry Department, Indian Institute of Technology, Haus Khas, New Delhi-110016, India
A. L. J. Rao ; Chemistry Department, Punjabi University, Patiala (Punjab), India
M. Satake ; Faculty of Engineering, Fukui University, Fukui 910, Japan


Puni tekst: engleski pdf 2.886 Kb

str. 91-97

preuzimanja: 1.470

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Sažetak

Conditions have been developed for the adsorption of copper
and bismuth as their n-butylxanthates over microcrystalline naphthalene. The mixture of the metal complex and naphthalene is
separated by filtration and dissolved in choloroform. The absorbance
is measured at 423 nm for copper and 362 nm for bismuth.
Beer's law is obeyed in the concentration ranges 2.5-65.0 ug of
copper and 5.0-130.0 ug of bismuth in 10 ml of the final chloroform
solution. The molar adsorptivities and sensitivies are calculated
to be Cu: 8.260 X 103 drn" mol-I cm-I, 0.0076 ~lg/cm2 and Bi:
1.231 X 104 dm" mol." cm-I, 0.016 !-lg/cm2.Aliquots containing 20 !-lg of copper and 50 !-lgof bismuth give mean absorbances of 0.260 and 0.295 with standard deviations of 0.0023 and 0.0028 and relative
standard deviations of 0.880/0and 0.95 % respectively. The optimum
pH range for the adsorption is 1.5-4.4 for copper and 2.2-6.6 for
bismuth. The interferences of various ions have been studied in
detail and the method has been applied successfully for the determination of copper in certain alloys and bismuth in an ore.

Ključne riječi

Hrčak ID:

177744

URI

https://hrcak.srce.hr/177744

Posjeta: 1.623 *