Change in chromatogram patterns after volatilization of some Aroclors, and the associated quantitation problems
PCBs with the highest vapor pressures (fewest chlorines) in Aroclors 1016, 1242, 1254, and 1268 were enriched in the vapor phase relative to the original Aroclor during volatilization from a glass surface for up to 8 hr. PCBs with the lowest vapor pressures (most highly chlorinated) were enriched in the corresponding residue. Thus, visual matching of gas chromatograms with those of Aroclor standards may not be sufficient to identify a specific Aroclor since the past history of a sample is often unknown. The enrichment also was detected using isomeric classes, but not using total chlorine content. The perchlorination method and the Webb-McCall method using all chromatographic peaks agreed quantitatively; this was not always so for the NIOSH multiple peaks and the Webb-McCall methods.
- Research Organization:
- Univ. of Cincinnati Medical Center, OH
- OSTI ID:
- 5566198
- Journal Information:
- Am. Ind. Hyg. Assoc. J.; (United States), Vol. 48:7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHLORINATED AROMATIC HYDROCARBONS
VAPOR PRESSURE
VOLATILITY
GAS CHROMATOGRAPHY
MEASURING METHODS
AROMATICS
CHROMATOGRAPHY
HALOGENATED AROMATIC HYDROCARBONS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHYSICAL PROPERTIES
SEPARATION PROCESSES
THERMODYNAMIC PROPERTIES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)