Determination of metals in poly(vinyl chloride) by atomic absorption spectrometry. Part I. Determination of calcium, aluminium and antimony in samples of poly(vinyl chloride) with a high content of alkaline earths

Abstract

The treatment of PVC with H₂SO₄ and H₂O₂ causes difficulties if the PVC contains lead or alkaline earths because of the precipitation of the corresponding sulphates. This precipitate can be dissolved with EDTA in ammonia. The procedure is fast and simple and the determination of calcium, aluminium and antimony by atomic absorption spectrometry give a good degree of accuracy.