US EPA

1021952 

Journal Article 

Non-radioactive electron-capture detector 

Wentworth, WE; Huang, J; Sun, K; Zhang, Y; Rao, L; Cai, H; Stearns, SD 

1999 

Yes 

Journal of Chromatography A
ISSN: 0021-9673
EISSN: 1873-3778 

842 

1-2 

1-2 

English 

10.1016/S0021-9673(99)00121-1 

WOS:000080652500013 

http://linkinghub.elsevier.com/retrieve/pii/S0021967399001211
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BIOSIS COPYRIGHT: BIOL ABS. This paper is a review of the research that has been performed on the development and applications of a non-radioactive electron-capture detector (ECD). The ionization in the ECD, normally supplied by a radioactive foil, is supplied by the electromagnetic radiation emanating from a high voltage pulsed discharge in pure helium. This emission consists of a broad band in the vicinity of 13.5-17.5 eV. This is a well know emission arising from a transition in an excited He2 molecule to a dissociative on source. Most radioactive ECDs generally pass the GC column effluent directly over the radioactive foil where the electrons are produced from the emission. Furthermore, the internal volume of the non-radioactive ECD can be made smaller than that of radioactive ECD using 63Ni foils. For this reason, lower make-up gas flow-rates can be used and the sensitivity of the non-radioactive ECD is slightly greater than that for radioactive ECD. The temperature dependence of the non-radio 

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