ICP-AES Determination of Metal Elements in PVC Thermal Stabilizer

An ICP-AES method for simultaneous determination of Pb,Cd,Ba,Ca,Zn,Mg,Sn,Sb,La,Ce,Pr and Nd in PVC thermal stabilizer was proposed.It was found that precision of results obtained by the method of acid digestion in pressure reaction vessel were better than those obtained by the method of digestion with mixed acid and carbonization.Analytical conditions,including choice of analytical sepctral lines and elimination of interferences were studied experimentally.Wavelengths of 220.353,214.438,233.527,393.366,213.856,279.553,242.949,206.833,408.672,418.660,417.939 and 401.225 nm were selected as analytical lines for the determination of Pb,Cd,Ba,Ca,Zn,Mg,Sn,Sb,La,Ce,Pr and Nd respectively.Detection limits (3s) of the metal elements were less than 0.02 mg·L-1.The proposed method was used for the determination of 12 metal elements in PVC thermal stabilizer,giving values of recovery in the range of 95.0%-112.0%.