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Quantitative analysis of silver in chlorinated polymer  

Lim, Heon-Sung (Chemical Analysis Laboratory, Korea Research Institute of Chemical Technology)
Lee, Sueg-Geun (Chemical Analysis Laboratory, Korea Research Institute of Chemical Technology)
Publication Information
Analytical Science and Technology / v.18, no.5, 2005 , pp. 376-380 More about this Journal
Abstract
Quantitative analysis of silver from the thermal decomposition of chlorinated polymer contained nano silver is described. The chlorine contained in the chlorinated polymer (e.g. PVC) is liberated as hydrochloric acid gas by heating and a lot of silver produces AgCl. $HNO_3$ and $NH_4OH$ were used for dissolving the Ag and the AgCl. The silver complex was formed by $NH_4OH$. Then the complex was decomposed to silver by heating at $500^{\circ}C$ and the Ag was dissolved by dilute $HNO_3$. Recovery of silver in PVC material was 99.0%.
Keywords
quantitative analysis; silver; PVC; thermal decomposition;
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