Thermo Scientific FLASH HT Plus Elemental Analyzer for IRMS

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Thermo Scientific FLASH HT PlusElemental Analyzer for Isotope Ratio MSDynamic Flash CombustionDynamic Flash Combustion for C, N and S Isotope AnalysisIn 1968 we introduced the first fully automated elemental analyzer.This long record of continuous innovation in elemental analysis isthe basis for the Dynamic Flash Combustion mode used in thestand-alone and isotope-ready versions of the FLASH HT Plus.Automated injection of oxygen into the reactor at a predefinedtime guarantees quantitative sample conversion. The oxygen dosingis variable allowing for optimal reaction of different sample typesand the most economic usage of the combustion reactors.Tin capsules used for sample introduction combust in an exothermicreaction reaching a temperature of up to 1800°C for a fewseconds. Nitrous oxides which may be formed during combustionare reduced by Cu to N 2 .After removal of H 2 O, the N 2 , CO 2 and SO 2 are separated on anisothermal GC column and the 15 N/ 14 N, 13 C/ 12 C and 34 S/ 32 S isotoperatios are measured sequentially. Detailed information on parametersand setup is given in the Thermo Scientific application noteAN30194 Simultaneous N, C and S Isotope Ratio Determination ona DELTA V Isotope Ratio MS using a FLASH Elemental Analyzer.MAS 200R Autosampler for solidsApplications for Dynamic Flash Combustion• Authenticity control of beverages, food and drugs• Forensic science• Environmental analysis• Oceanography and limnology• Tracer analysisDynamic FlashCombustion furnaceHigh TemperatureConversion furnaceFLASH HT Plus fully automatedElemental Analyzer for Isotope Ratio MS600015N/ 14 N analysisN 2 28 29 m/z13C/ 12 C analysisCO 2 44 45 46 m/z34S/ 33 S analysisSO 2 64 66 m/zIntensity [mV]40002000400 200 400 600 800 1000Time [s]
High Temperature ConversionHigh Temperature Conversion for O and H Isotope AnalysisIn 1996 we introduced a high temperature conversion elementalanalyzer which has revolutionized the measurement of 18 O/ 16 O andD/H ratios in both organic and inorganic materials. Today, this proventechnology has become an integral part of the FLASH HT Plus.Quantitative high temperature conversion, often referred to aspyrolysis or thermochemolysis, rapidly and quantitatively convertsthe sample’s O and H into CO and H 2 in a reducing environment athigh temperatures (typically exceeding 1400°C). CO and H 2 areseparated in an isothermal GC column prior to transfer into the ionsource of the Isotope Ratio MS for sequential determinationof hydrogen and oxygen isotopes of the sample.The reactor is a glassy carbon tube filled with glassy carbongranules surrounded by a ceramic tube. The glassy carbon tubeensures that neither sample nor reaction gases make contact withthe ceramic tube to preclude oxygen isotope exchange at high temperature.This is the only analytical technology which allows highprecision isotope ratio monitoring of D/H and 18 O/ 16 O duringa single analysis (see chromatogram below).High Temperature Conversion has been increasingly used forisotope ratio analysis of H 2 O. Precisions close to those of classicalanalytical techniques can be attained on sub-microliter amountsof water with analytical time of 5-6 minutes for both isotopes.Status panelApplications for High Temperature ConversionWater trap and GC cabinet withone column for N 2 and CO 2 separationand another column for H 2and CO separation, TCD ThermalConductivity Detector.• Oxygen and hydrogen analysis of organic matter• Isotope ratio analysis of H 2 O• Medical tracer studies (doubly labeled water)• Oxygen isotopes of sulfates, phosphates, nitrates• Nitrogen and oxygen isotopes from nitrates• Hydrogen isotopes of phyllosilicates and amphiboles5
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Thermo Scientific FLASH HT Plus Elemental Analyzer for IRMS

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