Glow plasma

In AFS, the analyte is introduced into an atomiser (flame, plasma, glow discharge, furnace) and excited by monochromatic radiation emitted by a primary source. The latter can be a continuous source (xenon lamp) or a line source (HCL, EDL, or tuned laser). Subsequently, the fluorescence radiation is measured. In the past, AFS has been used for elemental analysis. It has better sensitivity than many atomic absorption techniques, and offers a substantially longer linear range. However, despite these advantages, it has not gained the widespread usage of atomic absorption or emission techniques. The problem in AFS has been to obtain a... 

The fluorination of the inner surface of intravenous tubing, using atmospheric pressure plasma glow (APG), has been evaluated to enhance biocompatibility and suppress plasticiser migration (273). The effect of plasma treatment on the migration of DOA, and an EVA-carbon monoxide terpolymer as partial or complete replacement, into isooctane solution has given positive results (231). A closed system microwave plasma reactor was used to react imidazole molecules to PVC surfaces with the claim that the resulting PVC was useful as an implant for biomedical applications, on the basis of spectroscopic studies (368). 

No.20, 2000, p.7355-60 POLYMER DEPOSITION USING ATMOSPHERIC PRESSURE PLASMA GLOW... 

Figure 1.3 clearly demonstrates the luminous gas phase created under the influence of microwave energy coupled to the acetylene (gas) contained in the bottle. This luminous gas phase has been traditionally described in terms such as low-pressure plasma, low-temperature plasma, nonequilibrium plasma, glow discharge plasma, and so forth. The process that utilizes such a luminous vapor phase has been described as plasma polymerization, plasma-assisted CVD (PACVD), plasma-enhanced CVD (PECVD), plasma CVD (PCVD), and so forth. 

Figure 4-30. Glow discharge plasma generated in the parallel plate magnetron. The negative plasma glow is trapped in the magnetic mirror formed by magnetron magnets.

In a low pressure plasma (glow discharge) the extent of ionization is small, typically 1 charge carrier per 10 neutral species (atoms, molecules, etc.). 

F. Tanfani, A.A. Durrani, M. Kojima, and D. Ch g)man, Glycidyl acrylate plasma glow discharged... 

Y J Kim, 1K Kang, M W Huh and S C Yoon, Surface characterization and in vitro blood compatibility of poly (ethylene teiephthalate) immobilized with insulin and/or heparin using plasma glow discharge, Biomaterials, 1999 21(2) 121-30. 

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