publication . Article . 1994

Iodometric microdetermination of phosphorus in organic compounds by use of An amplification reaction

Al Kubaisi, A. H. [عبد الله حسين الكبيسي]; Farag, A. B.; Amin, R. R.;
Open Access English
  • Published: 01 Jan 1994
  • Publisher: Qatar University
  • Country: Qatar
A high chemical amplification method is described for the iodometric microdetermination of phosphorus in organic compounds. This method depends on combustion by the oxygen flask, absorption of the combustion products in distilled water and conversion to orthophosphoric acid with bromine water. The phosphoric acid produced is then allowed to react with sodium molybdate in acid medium to form phosphomolybdic acid which is extracted into a mixture of diethyl ether and pentanol (5:1, V/V), and back extracted with sodium hydroxide. The molybdate thus produced (12 atoms molybdenum (VI) for each original phosphorus atom) is reduced with zinc in acetic acid medium to th...
free text keywords: Analytical Chemistry, الكيمياء التحليلية
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