Quantification and determination of enantiomeric ratios of chiral PCB 95, PCB 132, and PCB 149 in shark liver samples (C. coelolepis) from the Atlantic Ocean

✍ Scribed by Blanch, Gracia P. ;Glausch, Alexandra ;Schurig, Volker ;Serrano, Roberto ;Gonzalez, María José

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 440 KB
• Volume: 19
• Category: Article
• ISSN: 0935-6304
• DOI: 10.1002/jhrc.1240190706

✦ Synopsis

Abstract

Chiral 2,2′,3,5′,6‐pentachlorobiphenyl (PCB 95), 2,2′,3,3′,4,6′‐hexachlorobiphnyl (PCB 132) and 2,2′,3,4′,5′,6‐hexachlorobiphenyl (PCB 149) were quantified in Atlantic Ocean shark liver samples (C. coelolepis) by gas chromatography‐mass spectrometry (GC‐MS) and their enantiomeric ratios were studied by multidimensional gas chromatography (MDGC) with an achiral‐chiral column combination and detected by ECD and MS/SIM. The concentration range of the chiral PCBs was from 2 to 6 ng/g (fresh weight), which represents 2–6 % of the total PCB mean concentration. The investigations revealed a small enantiomeric bias of PCB 132 in most of the samples studied (ER = 0.75–0.89, ee = 6–14%), while PCB 95 and PCB 149 were present in racemic or almost racemic form.