A hydride generator system for a 1-kW inductively coupled plasma

Abstract

Anal. Chem. 1989, 61 I 285-288 285 excitation source. In addition to a gain in sensitivity, the instrument also acquires the complete molecular spectrum thereby increasing the qualitative information obtained with every measurement. The ability to normalize the fluorescence signal to the scattered light signal pro6des a simpler and more direct method of correcting for source and readout detector drift than methods employing beam splitters and auxiliary detectors. The results of this work point to the use of the CCD fluorescence spectrograph as a practical detector for use in high-performance liquid chromatography and flow-injection analysis. ACKNOWLEDGMENTThe authors thank Gary Sims and Richard Aikens of Photometrics, Ltd., and Robert W. Fitts of RCA for their assistance and support in the design and use of scientific grade CCD detector systems. LITERATURE CITED(1) Bradley, A. B.; Zare, R. N. J. Am. Chem. Soc. 1976, 98, 620. (2) Rlchardson, J. H.; Ando. M. E. Anal. Chem. 1977. 4 9 , 955-959. (3) Roach, M. C.; Harmony, M. D.

Investigation of the direct hydride generation nebulizer for the determination of arsenic, antimony and selenium in inductively coupled plasma optical emission spectrometry

“…Strong oxidants, interference of transition and noble metals and other species, including ions of other volatile hydride-forming elements can produce deleterious effects on hydride generation [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,20,21,22,23,24]. It is well known that interferences of transition metals are the most severe and therefore must extensively studied.…”

“…This was replaced with a conventional Scott type spray chamber. Although they achieved extremely high tolerance levels of the transition metals in selenium hydride generation, the LOD decreased by one order of magnitude with respect to conventional hydride generation techniques [2,3,4,12,13,14] and those of similar type [9].…”

“…They used a torch of larger diameter than usual that provides stability to the plasma discharge. Hwang et al [4] described a simple continuous flow mode hydride generation system development for ICP-OES. The sample and reductant were continuously pumped into the hydride generator and the waste sample was continuously removed to ensure a constant pressure.…”

Influence of methane addition on selenium isotope sensitivity and their spectral interferences

“…For the HGIS, we used 2 N HCl (double distilled) in order to obtain efficient Se hydride formation. HCl has a strong reducing nature favoring the Se hydride formation 17, 26, 36. With the use of a HGIS only part of the Cl will enter the plasma and cause a relatively small interference on m / z + 77 17.…”

“…For the above‐mentioned reasons, Se isotope measurements can be improved by increasing the Se sensitivity and increasing the analyte‐interference ratio. An online hydride generator system coupled to the MC‐ICP‐MS increases the sensitivity, because it significantly enhances the efficiency of the analyte transfer to the plasma and the ionization compared with standard wet aerosol introduction 8, 9, 11, 12, 26. Additionally, the hydride generation only transfers volatile hydride forming elements to the plasma, thereby excluding some sample‐derived spectral interferences such as 66 Zn 16 O + , 48 Ti 14 N 14 N and 39 K 39 K 13, 20–27…”