Gas chromatography/isotope ratio mass spectrometry of recalcitrant target compounds: performance of different combustion reactors and strategies for standardization.
作者： Sandra Reinnicke , Dieter Juchelka , Sibylle Steinbeiss , Armin Meyer , Andreas Hilkert
DOI: 10.1002/RCM.6199
关键词: Combustion 、 Carbon 、 Nitrogen 、 Gas chromatography 、 Analytical chemistry 、 Chemistry 、 Isotope-ratio mass spectrometry 、 Isotopes of nitrogen 、 Isotope analysis 、 Stable isotope ratio
摘要: RATIONALE Compound-specific isotope analysis (CSIA) relies on continuous flow combustion of organic substances to CO2 and N2 in a miniature reactor measure 13 C/12 C 15 N/14 N stable ratios. Accurate is well established for many volatile hydrocarbons. In contrast, compounds which contain hetero halogen atoms are less may be more recalcitrant combustion. METHODS This study tested carbon nitrogen atrazine, desethylatrazine (DEA), dichlobenil 2,6-dichlorobenzamide (BAM) by gas chromatography/isotope ratio mass spectrometry (GC/IRMS) with multiple tubes two different kinds (conventional CuO/NiO/Pt NiO tube/CuO-NiO prototype). RESULTS The advantages the were absence an additional reduction reactor, possibility routine reoxidation analysis, reliable atrazine DEA measurements over several hundred injections. BAM showed good accuracy carbon, but notable variations trueness was nevertheless possible bracketing samples external compound-specific standards subsequent offset correction. CONCLUSIONS We conclude that instrument data should never taken at its 'face value', must consistently validated respective analytes. Copyright © 2012 John Wiley & Sons, Ltd.
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