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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

Comparison of the elution patterns for polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDDs/Fs) and dioxin-like polychlorinated biphenyls (PCBs) ..

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2005, v.18 no.1, pp.12-22





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Abstract

The elution patterns of seventeen 2,3,7,8-substituted PCDDs/Fs and 12 dioxin-like PCBs were studied by both manual open columns and automatic parallel LC columns in cleanup procedure. PCDDs/Fs and non-ortho-PCBs from other mono-ortho-PCBs were separated on automatic LC column, whereas they were not separated on an open manual column. The elution study on two cleanup methods was carried out using the PAR solution of unlabeled congeners and checked the recovery of each congener. Total recoveries of cleanup fractionation were ranged between 61.9~96.0% for PCDDs/Fs and 70.4~79.0% for PCBs by manual open columns and 71.8~104.5% for PCDDs/Fs and 61.3~120.3% for PCBs by automatic parallel LC columns, respectively. Unfortunately, #169-HxCB and 1,2,3,7,8-PeCDD were not separated on DB-5MS capillary column. The ions of 1,2,3,7,8-PeCDD were selected at M/M+2 instead of M+2/M+4 suggested by EPA method 1613. It is possible to discriminate 1,2,3,7,8-PeCDD and PCB #169 in HRGC/HRMS analysis.

keywords
PCDDs/Fs, dioxin-like PCBs, manual open columns, automatic parallel LC columns, HRGC/HRMS


Reference

1

Washington DC, (1994.) Tetra through octachlorinated dioxins and furans by isotopic dilution HRGC-HRMS,

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