Glow discharge detector for

Various workers (Reamer et al, and Quimby et al ) have examined the applicability of helium in microwave glow discharge detectors for the detection of organolead compounds leaving a gas chromatographic column. A microwave emission detector (MED) was firsi described by McCormack et al. ... 

TABLE 18. Limits of detection for various elements using the helium glow discharge detector (preliminary values) ... 

Table 147. Limits of Detection for Various Elements using the Helium Glow Discharge Detector (Preliminary Values)...

Recently, Hieftje et al.15-16 equipped a small double-focusing mass spectrograph built in house with Mattauch-Herzog geometry with several ion sources (such as glow discharge, an inductively coupled plasma ion source or a microwave plasma torch) and a novel array detector for simultaneous ion detection. 

Methods involving reduction to produce hydrides followed by separation and detection by an emission-type detector have been used for organoarsenic compounds . The design of a glow discharge tube proposed earlier as an element-specific detector for gas... 

Here, up represents the noise of the photoelectrons. When the photon flux is n, Up x VW up, is the dark current noise of the photomultiplier and is proportional to the dark current itself, up is the flicker noise of the source and is proportional to the signal and uA is the amplifier noise resulting from electronic components. The last contribution can usually be neglected, whereas up is low for very stable sources (e.g., glow discharges) or can be compensated for by simultaneous line and background measurements. As up, x Ip, one should use detectors with low dark current, then the photon noise of the source limits the power of detection. 

In speciation, glow discharges are excellent detectors for GC work as shown earlier. In addition to the low power and pressure ICPs they can be used successfully for element-specific detection for gas chromatography. An rf-GD-MS system has been used as a detector for GC by Olson et al. [661], The set-up should consist of a temperature-controlled transfer line of stainless steel from the exit of the GC to the inlet of the GD source. The system has been tested with tetraethyl-Pb, tetraethyl-Sn and tetrabutyl-Sn and provided useful structural information for the identification of these compounds through the observation of fragment peaks the detection limits were down to 1 pg. 

Schepers C. and Broekaert J. A. C. (2000) The use of a hollow cathode glow discharge (HCGD) as an atomic emission spectrometric element specific detector for chlorine and bromine in gas chromatography, J Anal At Spectrom 15 51-65. 

The use of a glow discharge tube as a detector for the gas chromatography of organosilicon compounds has been discussed466. 

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