A New Preconcentration Method of Hydrophobic Substances in Water Using Polyvinylmethylether as a Thermo-responsive Polymer. Application to Spectrophotometric Determination of a Trace Amount of Phosphate in Natural Water

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Abstract
A new method of concentration and separation for determining trace amounts of phosphate in natural water, using polyvinylmethylether(PVME), one of the thermally reverse polymers, was provided. When the solution was warmed to 45 °C, PVME shrank greatly, so that the phosphomolybdate Malachit Green aggregate stuck to the walls along with PVME.

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