Glow discharge detector

The selectivity of the technique was measured by Feldman and Batistoni by chromatography of a silylized mixture of phenylarsonic acid, nonanoic acid, undecanoic acid and three aliphatic hydrocarbons. In each case a flame ionization detection trace was obtained simultaneously with the glow discharge detector trace. The selectivity of a given Si or As line was defined as the ratio of the peak height obtained per gram atom of carbon in the form of the interfering compound tested. 

Figure 22 shows results obtained in the gas chromatography of a silylated mixture of aliphatic acids, phenylarsenic acid and hydrocarbons using a flame ionization detector and a glow discharge detector set at the silicon and arsenic wavelengths. 

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

FIGURE 22. Gas chromatograms of a silylated mixture of aliphatic acids, phenylarsonic acid and hydrocarbons. Top curve flame ionization detector (FID). Centre and bottom curves glow discharge detector (GDD), with monochromator set as indicated. Reprinted with permission from Reference 161. Copyright (1977) American Chemical Society... 

More recent work on the determination of alkylmercury compounds has been centred on the applicability of the helium microwave glow discharge detector as a gas chromatographic detector. This has been discussed by Bache and Lisk. Grossman, Talmi92 and Quimby et al have examined the applicability of helium microwave glow discharge detectors to the detection of diphenylmercury. 

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 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. 

Eijkel, J.C.T., Stoeri, H., Manz, A.J., An atmospheric pressure dc glow discharge on a microchip and its application as a molecular emission detector J. Anal. Atom. Spectrom. 2000, 15, 297-300. 

The direct introduction of atomic vapour into the AAS flame can also be seen as an equipment variation [148, 152], Here, the evaporation of the steel samples can be carried out with the help of the glow-discharge lamp [148] or an aerosol generator with a low current d.c.-arc discharge [152]. Another example is the combination of gas chromatography and AAS [92], where AAS is used as an element detector. 

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