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INDIRECT SPECTROPHOTOMETRIC DETERMINATION OF CERIC ION IN AQUEOUS SOLUTION | ||
| AL-TAQANI | ||
| Article 1, Volume 18, Issue 1, 2005, Pages 67-71 | ||
| Authors | ||
| Salahdin M. Al-Talib; Razan Y.Q. Al-Abachi | ||
| Abstract | ||
| A new simple and rapid colorimetric method for the determination of ceric ion is described. It is based on the effect of ceric ion as oxidizing agent in the coupling of phenothiazine and sulphacetamide sodium to give an intense bluish-green water-soluble dye with maximum absorption at 614 nm. A graph of absorbance versus concentration shows that Beer’s law is obeyed over the concentration range 7-840 g of ceric ion in a final volume of 25 ml (i.e., 0.28-33.6 ppm), with a molar absorptivity of 4.52 103 l.mol-1.cm-1, and Sandell sensitivity of 0.0310 g.cm-2,with a relative error of less than 2.8% and a relative standard deviation of better than 3% depending on the concentration | ||
| Keywords | ||
| Ceric ion determination; phenothiazine; Sulphacetamide sodium; spectrophotometry | ||
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