[Analysis of phenolic compounds in aqueous samples by gas chromatography coupled with headspace solid-phase microextraction using poly (phthalazine ether sulfone ketone) coated fiber].

The direct trace analysis of phenolic compounds in aqueous samples was performed by headspace solid-phase microextraction/gas chromatography (HS-SPME/GC). A laboratory made poly (phthalazine ether sulfone ketone) (PPESK, 30 microm) coated fiber was used to extract the phenols from aqueous samples. The parameters affecting the extraction efficiency, such as extraction temperature and time, pH value, and salt concentration, were optimized.

Fast temperature programming on a stainless-steel narrow-bore capillary column by direct resistive heating for fast gas chromatography.

A direct resistive-heating fast temperature programming device for fast gas chromatography was designed and evaluated. A stainless-steel (SS) capillary column acted both as a separation column and as a heating element. A fast temperature controller with the deviation derivative proportional-integral-derivative (DDPID) control algorithm, which was suitable for ramp control using ramp-to-setpoint function, was used to facilitate the fast pulse heating.