R e s t e k
Analysis of PCBCongeners byGC-MS
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Toxic PCB’s byUSEPAmethod 1668 commonly
run on “octyl” phases
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Veryhighbackground frombleeddecreases
sensitivity
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Phase loss can cause retentionorder changes
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“5” phases canhave coelution issues
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• 156/157
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Rtx-500Column can improve upon these…
