Lower limits of detection in speciation analysis by coupling high-performance liquid chromatography and chemical-vapor generation

Arslan, Yasin
Yildirim, Emrah
Gholami, Mehrdad
Bakirdere, Sezgin
Speciation studies are much more important than total element determination because toxicity of many elements depends on their chemical forms. Nobody can claim that a foodstuff is very dangerous to eat by determining total arsenic due to the possibility that the arsenic could be present in non-toxic forms. Hence, speciation studies are crucial in any matrix relevant to human beings.


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Toxicological studies have shown that the degree of toxicity of some elements depends on the chemical form in which the element is present. Chromium (III) is considered as an essential micronutrient for human whereas chromium (VI) is a potentially carcinogenic agent. So the speciation of inorganic chromium in environmental samples is required for accurate assessment of pollution levels. The chromium content in natural water is usually very low, and a preconcentration is often necessary prior to the determin...
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Speciation analysis is important for arsenic. Novel methods to improve the sensitivity for determination of total arsenic and arsenic speciation have been developed. The techniques basically rely on generation of volatile arsenic species by reaction with sodium borohydride followed by trapping on a W-coil atomizer and finally releasing analyte atoms by heating the atomizer; the system is named as W-coil atom trapping electrothermal atomic absorption spectrometry (WC-ETAAS). Sample solution may be introduced...
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As Daphnia have an important role in freshwater food webs, it is important to understand how environmental stressors affect their survival and life history traits. Daphnia pulex were first acutely exposed to a combination of NaCl salinities (0.00-10.0 g/L) and fish-exuded kairomone. The 24 and 48 hour LC50 values were 0.401 and 0.159 g/L in kairomone-absence and 1.962 and 1.007 g/L in kairomone-presence. Hence, survival decreased with increasing salinity, while the kairomone enhanced daphnid resistance to s...
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CO2 mitigation through photosynthesis has attracted attention as an alternative strategy over chemical methods because it is less costly and energy-consuming. When the microalgae are fed with wastewaters containing high nitrogen and phosphorus, they remove nitrogen and phosphorus from the wastewater. Moreover, the harvested biomass from microalgal reactors constitutes a raw material for the production of different high-value chemicals and bio-fuels. This study investigated the coupled removal of CO2 from th...
Citation Formats
Y. Arslan, E. Yildirim, M. Gholami, and S. Bakirdere, “Lower limits of detection in speciation analysis by coupling high-performance liquid chromatography and chemical-vapor generation,” TRAC-TRENDS IN ANALYTICAL CHEMISTRY, pp. 569–585, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/67599.