Determination of metals in poly(vinyl chloride) by atomic absorption spectrometry. Part 3. Determination of cadmium, antimony and tin in samples of poly(vinyl chloride) with carbon black

Abstract

Treatment with H₂SO₄ and H₂O₂ is not sufficient for the dissolution of samples of poly(vinyl chloride)(PVC) containing carbon black. For such samples, fuming HNO₃ is necessary after the conventional treatment. This procedure has no adverse effect on the determination of cadmium, antimony and tin by atomic absorption spectrometry, which can be carried out with good precision and reliability.