Detection of hexabromocyclododecane and its metabolite pentabromocyclododecene in chicken egg and fish from the official food control

被引:69
作者
Hiebl, Josef
Vetter, Walter
机构
[1] Univ Hohenheim, Inst Food Chem, D-70593 Stuttgart, Germany
[2] Bayer Landesamt Gesundheit & Lebensmittelsicherhe, D-85764 Oberschleissheim, Germany
关键词
polybrominated flame retardants; hexabromocyclododecane; pentabromocyclododecene; chicken eggs; fish fillet;
D O I
10.1021/jf063428b
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
During routine gas chromatography with electron capture detection (GC/ECD) analysis of chicken eggs, we observed that the most prominent peak in some samples did not match the retention time of any of the food contaminants screened. Subsequent GC coupled with mass spectrometry (GC/MS) studies clarified that the mass spectrum of the peak was very similar to hexabromocyclododecane (HBCD), which was also identified by GC/MS in the egg. The unknown compound was positively identified as pentabromocyclododecene (PBCDE), a metabolite of HBCD detected for the first time in foodstuffs. Studies of the analytical method used for the analysis of pesticides and contaminants showed that this cleanup method was suitable for the determination of HBCD and PBCDE, but storage of sample extracts resulted in the loss of HBCD when the sample extracts were not sufficiently purified. The concentrations of HBCD and PBCDE in the high polluted sample were 2.0 and 3.6 mg/kg egg fat. HBCD and PBCDE were also detected in two additional eggs at lower levels (< 0.15 mg/kg), whereas 75 eggs did not contain these compounds (< 0.02 mg/kg). We also detected HBCD and PBCDE in two samples of whitefish (Coregonus sp.), while an eel sample (Anguilla anguilla) positively tested for HBCD did not contain PBCDE. Surprisingly, the potential metabolite of HBCD, PBCDE, has not been detected before in any food or environmental sample. The present results indicate that more attention should be paid to the detection of HBCD and its metabolite PBCDE in chicken eggs.
引用
收藏
页码:3319 / 3324
页数:6
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