ACTIVATED SILICONE-RUBBER AS A SORBENT FOR SOLID-PHASE EXTRACTION OF VOLATILES FROM AQUEOUS-SOLUTIONS

Thermally activated polysiloxane resin (silicone rubber) was used as a solid sorbent for direct solid phase extraction of volatiles from aqu eous solution prior to GC-MS analysis. Proposed silicone rubber extrac tion technique (SRE) was compared with widely used and accepted Tenax dynamic head-space preconcentration. SRE provided comparable response for analyzed mixture of aliphatic alcohols and aldehydes (C-4-C-8). Si gnificantly lower response was observed for the studied mixture of aro matic compounds. Shorter time of analysis and higher sensitivity towar ds less volatile aliphatic compounds were the main advantages of the p rocedure involving SRE over head-space preconcentration technique.