Spatially resolved measurements to improve analytical performance of solution-cathode glow discharge optical-emission spectrometry
نویسندگان
چکیده
منابع مشابه
Spatially-resolved observation of the excitation temperature in a glow discharge plasma for atomic emission spectrometry.
A two-dimensionally imaging spectrometer system was employed to obtain the spatial distribution of the excitation temperature in a glow discharge plasma for emission analysis. A Grimm-style glow discharge excitation source, whose hollow anode had an inner diameter of 8 mm, was observed over the whole emission area. The mapping of the excitation temperature was conducted by using a two-line meth...
متن کاملSpatially-resolved observation of glow discharge plasma for atomic emission spectrometry.
An imaging spectrograph equipped with a CCD detector was employed to measure two-dimensional emission images from a glow discharge plasma in atomic emission spectrometry. The emission images at Zn I 334.50 nm for a zinc sample and at Cu I 324.75 nm for a copper sample could be obtained. Their emission intensities were not uniform in the radial direction of the plasma region but became weaker at...
متن کاملAbsolute Spatially- and Temporally-Resolved Optical Emission Measurements of rf Glow Discharges in Argon
Spatially- and temporally-resolved measurements of optical emission intensities are presented from rf discharges in argon over a wide range of pressures (6.7 to 133 Pa) and applied rf voltages (75 to 200 V). Results of measurements of emission intensities are presented for both an atomic transition (Ar I, 750.4 nm) and an ionic transition (Ar II, 434.8 nm). The absolute scale of these optical e...
متن کاملSpatially resolved observation of a radio-frequency-powered glow discharge plasma for emission spectrometric analysis.
In glow discharge optical emission spectrometry, two-dimensional emission images for iron atomic lines were measured by using an imaging spectrograph equipped with a CCD detector, when a radio-frequency (r.f.) power source was employed for excitation. Emission images at the Fe I 371.99-nm and the Fe I 375.82-nm lines, having different excitation energies, were analyzed by the two-line method to...
متن کاملAtmospheric-pressure ionization and fragmentation of peptides by solution-cathode glow discharge.
Modern "-omics" (e.g., proteomics, glycomics, metabolomics, etc.) analyses rely heavily on electrospray ionization and tandem mass spectrometry to determine the structural identity of target species. Unfortunately, these methods are limited to specialized mass spectrometry instrumentation. Here, a novel approach is described that enables ionization and controlled, tunable fragmentation of pepti...
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ژورنال
عنوان ژورنال: Spectrochimica Acta Part B: Atomic Spectroscopy
سال: 2016
ISSN: 0584-8547
DOI: 10.1016/j.sab.2016.10.004