The Malaysian Journal of Analytical Sciences Vol 12 No 1 (2008): 10 - 15

 

 

 

ANALISIS TOLUENA RESIDU DALAM PEMBUNGKUS MAKANAN DENGAN KAEDAH PENGEKSTRAKAN RUANG KEPALA KROMATOGRAFI GAS

 

Lim Ying Chin¹  dan Mohd Marsin Sanagi²

 

¹INTEC, Universiti Teknologi MARA Section 17 Campus, 40200 Shah Alam, Selangor.

²Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 Skudai, Johor.

 

Abstract

Polymeric materials are used in many food contact applications as packaging material. The presence of residual toluene in this food packaging material can migrate into food and thus affect the quality of food. In this study, a manual headspace analysis was successfully designed and developed. The determination of residual toluene was carried out  with standard addition method and multiple headspace extraction ,MHE) method using gas chromatography-flame ionization detector ,GC-FID). Identification of toluene was performed by comparison of its retention time with standard toluene and GC-MS. It was found that the suitable heating temperature was 180 oC with an optimum heating time of 10 minutes. The study also found that the concentration of residual toluene in multicolored sample was higher  compared to monocolored sample whereas residual toluene in sample analyzed using standard addition  method was higher compared to MHE method. However, comparison with the results obtained from  De'Paris laboratory, France found that MHE method gave higher accuracy for sample with low analyte concentration. On the other hand, lower accuracy was obtained for sample with high concentration of residual toluene due to systematic errors. Comparison between determination methods showed that MHE method is more precise compared to standard addition method.

 

Keywords: Headspace extraction, Food packaging material, Gas chromatography

 

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