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Fourth Derivative Spectrophotometry in Simultaneous Determination of Calcium and Magnesium in Mixture | ||
| Tikrit Journal of Pure Science | ||
| Article 1, Volume 14, Issue 2, 2009, Pages 57-63 | ||
| Author | ||
| Moadh .A. AL-Hajaar | ||
| Abstract | ||
| The study included determination of calcium and magnesium in mixture by using 4th–derivative spectrophotometry. The method is based on the red complexes formed by both metal ions with PURPURATE (MUREXIDE ) indicator (violet in colour )in alkaline ethanol – water mixture .The range of application were between 0 to 2.4 µg / ml and between 0 to 1.4 µg / ml at 502 &465 nm for calcium and magnesium respectively. A statistical evaluation of the experimental results was reported. | ||
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