Innovative Detection, Separation, and Sampling Techniques for Trace Analysis by Gas Chromatography

摘要

Several studies related to sampling, separation and detection by gas chromatography have been concluded. Fundamental studies and practical applications have been made of selective electron capture sensitization in which the response of an electron capture detector is modified by addition of nitrous oxide to the carrier gas. Sizable signal enhancements have been observed for acetonitrile, acrylonitrile, acrolein, several amines, phenols and polycyclic aromatic hydrocarbons. A selective sorbent has been synthesized and developed that, when used as a chromatographic pre-column, selectively removes and concentrates oxygenates from a sample stream that also contains other organic compounds such as hydrocarbons and chlorinated hydrocarbons. A separation of a complex mixture of metal chelates has been accomplished using a bonded-phase, wall-coated fused silica capillary chromatographic column. Limited success has resulted from attempts to separate optical isomers when a chiral metal chelate is incorporated into a chromatographic stationary phase. (Author)