Constructed reed beds - Environmental Science & Technology (ACS

May 30, 2012 - Constructed reed beds. Environ. Sci. Technol. , 1995, 29 (1), pp 12A–12A. DOI: 10.1021/es00001a725. Publication Date: January 1995...
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ion. (J• Am. Soc. Mass Spectrom. 1994, 5, 757-64)

Two-dimensional GC Decreasing the time required for a gas chromatographic analysis increases sample throughput and allows meth­ ods development. Zaiyou Liu and col­ leagues at the Centers for Disease Control and Southern Illinois Univer­ sity have developed a comprehensive two-dimensional gas chromatographic system that achieves fast and selective analysis of semivolatile pesticides. Their system uses a two-stage ther­ mally modulated interface to link two analytical columns of differing polarity within a single GC oven. The system was tested with a 15-component pes­ ticide mixture. Results showed com­ plete resolution of the pesticides in