R e s t e k
Dioxin andFuranAnalysis
•
Dual columnmethod
–
Usually5%diphenyl column and a high-cyano
column (egRtx-225)
–
Cyano columns have poorer lifetimes and lower
maximum operating temperatures
–
5%diphenyl phases donot have the selectivity to
accuratelyquantitatemost samples
• USEPA requires 2,3,7,8-tcdf to be confirmed on aX-225
•
Desirable to have both columns in the same oven,
and to improve the separation of the “5”
