Journal ArticleDOI
Investigations of interferences in graphite furnace atomic-absorption spectrometry using a dual cavity platform. Part 1. Influence of nickel chloride on the determination of antimony
TLDR
In this paper, the analyte element in a molecular form during volatilisation of the matrix or, in general, during pre-atomisation treatment steps are found to be dominant when antimony and nickel chloride are mixed.Abstract:
Analyte and interferent are volatilised from separated spots of a L'vov platform with two cavities. The results obtained give a deeper insight into the mechanisms of interferences observed in a graphite tube furnace. Losses of the analyte element in a molecular form during volatilisation of the matrix or, in general, during pre-atomisation treatment steps are found to be dominant when antimony and nickel chloride are mixed. Pronounced interactions between the gas phase and the condensed phase are observed, however, when the analyte and interferent are separated on the dual cavity platform. Essentially, all interferences disappear when nickel in nitric acid is used as a matrix modifier and proper conditions are selected. The absence of any gas-phase interactions allows the conclusion that near thermal equilibrium is obtained under these conditions. The characteristic mass found for antimony was typically between 25 and 30 pg per 0.0044 A s.read more
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Journal ArticleDOI
Investigation and elimination of chloride interference on thallium in graphite furnace atomic absorption spectrometry
Journal ArticleDOI
Determination of cadmium, copper and lead in mineral coal using solid sampling graphite furnace atomic absorption spectrometry
TL;DR: In this paper, the use of permanent chemical modifiers in graphite furnace atomic absorption spectrometry (SS-GF AAS) was investigated as a potential technique for the routine determination of trace elements in mineral coal and cadmium, copper and lead were chosen as the model elements.
Journal ArticleDOI
Proposed mechanism for the action of palladium and nickel modifiers in electrothermal atomic absorption spectrometry
TL;DR: By the use of Fourier transform infrared spectrometry, it was found that palladium chloride decreased the temperature of the reduction of PbO and Ga2O3 with graphite.
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Mechanisms of chloride interferences in atomic absorption spectrometry using a graphite furnace atomizer investigated by electrothermal vaporization inductively coupled plasma mass spectrometry. Part 2. Effect of sodium chloride matrix and ascorbic acid chemical modifier on manganese
TL;DR: In this article, the authors investigated the interference by sodium chloride with the atomization of manganese in electrothermal atomic absorption spectrometry (ETAAS) using ETV-ICP-MS.
Journal ArticleDOI
Fully Automatic On-line Separation Preconcentration System for Electrothermal Atomic Absorption Spectrometry: Determination of Cadmium and Lead in Sea-water
TL;DR: An automatic separation preconcentration system coupled to an electrothermal (graphite furnace) atomic absorption spectrometer and a certified reference material showed good agreement with the certified values and was applied to the determination of Cd and Pb in near shore sea-water from Patagonia, Argentina.