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Simultaneous measurements and determinations of stable carbon and nitrogen isotope ratios, and organic carbon and nitrogen contents in biological samples by coupling of a small quadrupole mass spectrometer and modified carbon-nitrogen elemental analyzer

Isotope AnalysisEnvironmental ChemistryOrganic CarbonEngineeringEnvironmental Analytical ChemistryIsotope GeochemistryBioanalysisMass SpectrometryBiological Mass SpectrometryBiogeochemical CycleNitrogen Isotope RatiosAnalytical ChemistryStable Isotope ProbingMedicineStable Carbon