Measuring circuit for automatic measurement of electron-capture detector characteristics

✍ Scribed by Jan Lasa; Janusz Rosiek; Ireneusz Śliwka

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 637 KB
• Volume: 299
• Category: Article
• ISSN: 1873-3778
• DOI: 10.1016/s0021-9673(01)97824-0

✦ Synopsis

A voltage impulse generator with a varying repetition time for supplying electron-capture detectors is described. The generator allows the measurement of the detector ionization current with a change of the pulse repetition time (tr) from 1 to 5200 psec in 8.3 min. The generator allows the measurement of the detector characteristics for an impulse duration time in the range 0.25-90 psec. A gas sample injector that enables a constant mass of a sample component to be inserted cyclically into the carrier gas stream so as to trace the detector signal as the repetition time of the impulses supplying the detector changes is described. The influence of the electrode geometry, carrier gas purity and detector temperature on the value of the ionization current and the detector signal is discussed.