Instrumental Setup for Simultaneous Total and Speciation Analysis of Volatile Arsenic Compounds in Gas and Liquefied Gas Samples
| Autor: | Thuy Diep Thanh Vo, J. Ignacio García Alonso, Jorge Ruiz Encinar, Mariella Moldovan, Laura Freije-Carrelo |
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| Rok vydání: | 2017 |
| Předmět: |
Detection limit
Liquid gas 010401 analytical chemistry Analytical chemistry chemistry.chemical_element Butane 010501 environmental sciences 01 natural sciences Nitrogen 0104 chemical sciences Analytical Chemistry chemistry.chemical_compound Arsine chemistry Standard addition Environmental chemistry Volatiles Arsenic 0105 earth and related environmental sciences |
| Zdroj: | Analytical Chemistry. 89:5719-5724 |
| ISSN: | 1520-6882 0003-2700 |
| Popis: | Although analysis of metals and metalloids, such as arsenic, is widely spread in many different fields, their analysis in gas and liquefied gas samples is still a challenge. A new GC-ICP-MS set up has been developed for their simultaneous total and speciation analysis in gas and liquefied gas samples without the need of a preconcentration step. An arsine in nitrogen standard was used for optimization and evaluation of the system. Good linearity and detection limits in the very low ppt level for both total and speciation analyses were found. Liquefied butane pressurized under nitrogen and doped with arsine and a propylene real sample from a cracker plant were analyzed using both external calibration and standard additions methods. The good match between both quantifying approaches demonstrated almost negligible matrix effects, even for the total analysis. Application of the approach to check repartition of volatile elements or species between gas and liquid phases was performed in the real propylene sample. Finally, its potential applicability for the simultaneous total and speciation analysis of other elements, such as Hg, was also proved. |
| Databáze: | OpenAIRE |
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