Highly sensitive simultaneous spectrophotometric determination of phosphate and silicate based on formation of ion association complexes between astra phloxine and 12-heteropolymolybdate anions
Nowadays the highly sensitive determination of phosphate and silicateionsis necessary forthe analysis of high purity chemicals and water, including water used as cooling water in thermal and nuclear power plants. According to the standards, their concentration should be less than 10-7mol L-1.
The most serious problem in the analytical chemistry of heteropoly molybdate is the mutual interferein the determination of phosphorus (V), silicon (IV), arsenic (V), and germanium (IV). To avoid these interferences in applying spectrophotometric methods there is a need to develop a method that can determine one element by the elimination of the interference of other elements.