Comparative Study on Feasibility of Static HeadSpace/HeadSpace Solid Phase MicroextractionGCMS Detection of Residual Amounts of Volatile Organic Compounds in Plastic Packagings for Food

A comparative study on the feasibility of 2 sampling methods, i.e., static head space (SHS) method and headspacesolid phase microextraction (HSSPME) method used in combination with GCMS analysis of plastic packagings for food for the contents of residual amounts of 15 volatile organic compounds (VOC′s) was made. The temperature and time of extraction used in sampling with SHS were 100 ℃ and 20 min respectively, while microextractor of 50/30 μm DVB/CAR/PDMS was used in HSSPME and the extraction, was carried out at room temperature for 20 min. It was found that the values of detection limits found by sampling with HSSPME were much lower than that of SHS, but values of RSD′s (n=6) found by sampling with SHS as a whole showed better precision. Considering the fact that the threshold values of VOC′s in the plastic packagings are quite low, sampling with HSSPME is preferred to be used in combination with GCMS analysis.