Naslov
The Role of Analytical Atomic Spectrometry Methods in Speciation Analysis

Autori
Rončević, Sanda

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
International Symposium and Summer School on Bioanalysis / Schmid, Martin - Graz, 2011

Skup
International Symposium and Summer School on Bioanalysis

Mjesto i datum
Graz, Austrija, 18.09.2011. - 28.09.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Atomic spectrometry; Speciation analysis

Sažetak
Speciation analysis has been one of most prominent developments in analytical inorganic chemistry over the last few years. Generally, it can be stated that the chemical, physical, and morphological state of elements in a sample has a direct influence on their toxicity, bioavailability, bioactivity, transport, uptake, bio-geological distribution, and environmental impact.1 Identification and quantification of these species, requires a combination of instrumental techniques such as chromatography and atomic spectrometry. Advanced hyphenated techniques with plasma-based element sensitive detectors are the most often used speciation tools. The efficiency of hyphenated system is determined by some specific conditions as: connecting interface, temporal resolution of sample components, synchronous separation and detection, and transient signal acquisition. In this respect, efficiency of ion chromatography coupled to inductively coupled plasma spectrometry on example of iron speciation is demonstrated through several crucial analytical steps. Plasma tolerance on matrix interferences caused by organic matter introduction and characteristics of different nebulizing systems were examined according to maximum signal-to-noise ratio and the best detection limits criteria. By coupling with chromatography, a plasma spectrometer becomes a sort of flow-through detector which does not allow conventional steady-state signal measurement. Transient signal acquisition along with the influence of mobile phase on signal measurement, the contribution of the detector to peak broadening, and the detection power were examined in order to evaluate the role of plasma based hyphenated system in speciation analysis.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA