Capillary-radio-gas-liquid chromatography

✍ Scribed by K. Akira; S. Baba

• Publisher: Elsevier Science
• Year: 1988
• Weight: 60 KB
• Volume: 39
• Category: Article
• ISSN: 0883-2889
• DOI: 10.1016/0883-2889(88)90300-0

✦ Synopsis

Gas-liquid chromatography system on wide-bore capillary columns, equipped with a new synchronized accumulating radioisotope detector(SARD) was developed. The column effluent is split to SARD and flame ionization detector. The eluate split to SARD is mixed with counting gas(methane) after passing through an oxidation-reduction tube, and introduced into the counting assembly of SARD, which consists of seven I0-mi(128 x lO mm I.D.) gas-flow proportional counters connected longitudinally in series. The counter tubes are placed in 30 mm thick cylindrical lead housing, and connected with a mutual anticoincidence circuit in order to minimize the background. Signals from each counter are accumulated in synchronization with the travelling speed of the radioactive gas in the SARD. Transit time in one counter tube(l, 2, 3 or 4 sec) can be selected by changing flow rate of counting gas. Thus high resolution or enhancement of sensitivity can be selected according to the purposes of experiments. The apparatus is expected to be one of the most useful instruments in radioisotope tracer studies.