Comprehensive two-dimensional gas chromatography (GC×GC) offers high resolution and enhanced peak capacity separating complex samples, e.g. petrochemicals, essential oils, food or biological. This technique provides enhanced peak capacity and selectivity compared with that obtained from one dimensional GC. In this research, Assist. Prof. Dr. Chadin Kulsing and Dr. Nuttanee Tungkijanansin (Postdoctoral researcher) developed splitter-based non-cryogenic artificial trapping (SNAT) modulation approach. This system employs semi-nonpolar/polar columns, a restrictor and a microfluidic Deans switch applying periodic multiple heartcuts. The essential equipments will be several splitters between the first column outlet and the DS which enable artificial trapping process consisting of systematic pulse splitting, split-pulse delay and their overlapping prior periodic selective H/C of the pulse. Methods to adjust sampling time and modulation period will be developed with different numbers of the splitters. The established approach is cost effective and environmental friendly which will enable artificial trapping of highly/low volatile compounds within a single injection without cryogen consumption and enhanced 2D peak capacity the capabilities of which could not be obtained from the conventional modulation technologies. This will be applied for improved identification of waste tire pyrolysis samples. Such application could not be achieved from the conventional one-dimensional GC analysis with insufficient separation capability.
- Nuttanee Tungkijanansin
- Yada Nolvachai
- Puttaruksa Varanusupakul
- Napida Hinchiranan
- Chadin Kulsing
- Philip J. Marriott