THERMAL-DECOMPOSITION OF TOXAPHENE CONGENERS BY HIGH-RESOLUTION GAS-CHROMATOGRAPHIC PHASES

Some toxaphene congeners are thermally unstable under commonly used ga s chromatographic temperature conditions. The thermal stability of the 22 commercially available congeners has been studied at four differen t heating rates on four stationary phases Ultra 2 (5%-diphenyl-95%- -d imethylpolysiloxane), a liquid crystalline phase butoxy-benzylidene)-a lpha,alpha'-bis-p-toluidine), Rtx-2330 iscyanopropyl-10%-phenylcyanopr opyl-polysiloxane), and s-(2,3,6-O-t-butyldimethylsilyl)-beta-cyclodex trin (TBDMS-CD) diluted in OV-1701-OH. A substantial degradation of th e congeners Parlar 39, 42, 50, 56, 58, and 62 could be observed on the cyanopropyl polysiloxane stationary phase. Furthermore, the applied t emperature program and stationary phase had an influence on the signal areas. These factors are important for a quantitative analysis.