Formation of polyatomic ions from the skimmer cone in the inductively coupled plasma mass spectrometry

Zahran, N.F.; Helal, A. I.; Amr, M. A.; Abdel-hafiez, A.; Mohsen, H.T.

doi:10.1016/s1387-3806(03)00023-x

Cited by 21 publications

(16 citation statements)

References 15 publications

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“…Therefore, calibration curves for different elements are generated using matrix dilutions of brick clay-679 and red clay (RIAP) reference materials. 13 C is employed as internal standard element [10], because it has low degree of ionization (ionization potential = 11.25 eV) and consequently, not cause serve spectral interferences compared to oxygen [11].…”

Section: Quantification Methodsmentioning

confidence: 99%

Quantification of heavy metals in clays by dry plasma laser ablation-ICP-MS

Amr

Mohsen

Zahran

et al. 2007

International Journal of Mass Spectrometry

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Section: Quantification Methodsmentioning

confidence: 99%

Quantification of heavy metals in clays by dry plasma laser ablation-ICP-MS

Amr

Mohsen

Zahran

et al. 2007

International Journal of Mass Spectrometry

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“…They might become extremely complex in organic matrices. The formation of cluster ions from the dominant species in the plasma (Ar, H, O, C, N) is a major source of polyatomic interferences in ICP-MS and they occur preferentially in cooler plasma boundaries (possibly at the walls of the skimmer) 52 or in the sampling and expansion areas of the interface and even in the neighbourhood of vaporising droplets, where the gas temperature is somewhat lower. Nonose and Kubota investigated the optical characteristics of microplasmas behind the sampler and skimmer cone and observed an influence of the acceleration voltage on the formation of polyatomic interferences, as well.…”

Section: Spectral Interferencesmentioning

confidence: 99%

“…244 It is shown that, e.g. 52 Cr is clearly separated from the otherwise interfering polyatomic ions 40 Toxic elements (in particular As, Cd, Hg and Pb) were determined in the muscle tissue of river fish samples, 245 honey 246 and offal. 247 One major group of elements, which requires high sensitivity and that is gaining increased interest in food science as well, are the rare-earth elements.…”

Section: Applications In Life-science Researchmentioning

confidence: 99%

Inductively Coupled Plasma Mass Spectrometry

Jakubowski

Horsky

Roos

et al. 2014

Sector Field Mass Spectrometry for Elemental and Isotopic Analysis

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ICP-MS is based on the formation of (preferentially monovalent positively) charged atomic ions in an inductively coupled Ar plasma at almost 10 000 K. The ions formed are transferred from the plasma source at ambient pressure into a mass separator operated at high vacuum via a set of cones. The ions are separated according to their mass/charge ratio in the mass separator (quadrupole, magnetic sector field or time-of-flight mass separator). In most cases, the ions are detected using a secondary electron multiplier; in some set-ups (also) a Faraday cup can be used. Single-collector (scanning mass spectrometer usually used for quantitative elemental analysis) or multicollector (static operation of mass spectrometer for precise isotope ratio analysis) configurations can be found (Figures 12.1 and 12.2).

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“…Spectral interferences, mainly polyatomic ions, entrained oxygen, nitrogen, and moisture from the surrounding air, have been studied since the beginning of ICP-MS [1][2][3][4]. The use of high-resolution mass spectrometers [5] and collision/reaction cells [6] can attenuate these interferences.…”

Section: Introductionmentioning

confidence: 99%