Journal ArticleDOI
Investigations of a reduced palladium chemical modifier for graphite furnace atomic absorption spectrometry
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In this article, a comparison of palladium modifier methods in spike recovery studies of thallium was carried out to investigate differences between the reduction methods, and it was suspected that differences in the physical form of the palladium contributed to the variability in results.Abstract:
Palladium is a very useful chemical modifier for graphite furnace atomic absorption spectrometry. It can be used to stabilise many elements several hundred degrees higher than is possible with current methods. Its performance as a modifier is strongly affected by the sample matrix. The addition of a reducing agent provides for more consistent performance. The main purpose of the reducing agent is to “modify” the form of the palladium, guaranteeing that palladium is reduced to the metal early in the temperature programme. Differences were seen in the behaviour of the palladium modifier depending on the reduction method used. A comparison of palladium modifier methods in spike recovery studies of thallium was carried out to investigate differences between the reduction methods. It was suspected that differences in the physical form of palladium contributed to the variability in results. Scanning electron micrographs were used to investigate the physical form of palladium on the graphite surface. A method using the palladium modifier for the determination of selenium was compared with a commonly used procedure in spike recovery studies.read more
Citations
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Journal ArticleDOI
Direct and simultaneous determination of copper, chromium, aluminum, and manganese in urine with a multielement graphite furnace atomic absorption spectrometer.
Ting-Wan Lin,Shang-Da Huang +1 more
TL;DR: A simple method was developed for the direct and simultaneous determination of copper, chromium, aluminum, and manganese in urine using a multielement GFAAS (Perkin-Elmer SIMAA6000).
Journal ArticleDOI
Palladium nitrate–magnesium nitrate modifier for electrothermal atomic absorption spectrometry. Part 5. Performance for the determination of 21 elements
TL;DR: In this paper, the palladium nitrate-magnesium nitrate (Pd-Mg) mixed modifier was used for the determination of 21 elements, including bismuth, lead and tellurium.
Journal Article
Elements in environmental and occupational medicine
TL;DR: Deeper knowledge has to be reached in order to evaluate the significance of elements and, possibly, of their species in biological fluids at current doses and to face their effects, especially those in the first portion of the dose-response curve, which is going to be the main field of interest of occupational and environmental toxicology for the next few years.
Journal ArticleDOI
Elements in environmental and occupational medicine.
TL;DR: In this paper, the importance of elements and their species in biological fluids at current doses and in order to face their effects, especially those in the first portion of the dose-response curve, is evaluated.
Journal ArticleDOI
Mechanisms of action of platinum group modifiers in electrothermal atomic absorption spectrometry
TL;DR: In this article, the mechanism of action of PGM modifiers in electrothermal atomic absorption spectrometry (ETAAS) has been discussed in a very simplified form, the sequence of processes affording thermal stabilization of analytes by platinum group metal (PGM) modifiers appears to be the following: low-temperature stabilization of volatile analyte species is reached as a result of their chemisorption on the surface of the modifiers and/or on the graphite surface.
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