In the present study, natural and adulterated essential oils of lemongrass (Cymbopogon flexuosus) and palmarosa (Cymbopogon martinii) were differentiated and identified on the basis of their carbon isotope composition (13C/12C) using isotopic-ratio mass spectrometry (IRMS) technique. This technique ...
However, because of the possible influence of mechanochemical reactions and back sorption, analyses of the isotope composition of water extracted by crushing from fluid inclusions are challenging.#An isotope ratio mass spectrometry (IRMS)-based method for hydrogen (and oxygen) isotopic analysis in sub...
Determination of Isotopic Ratio by Multi-collector Double-focusing Inductively Coupled Plasma Mass Spectrometry 多接收双聚焦等离子体质谱法测定高精度同位素比 www.ilib.cn 4. Determination of Nanogram Samarium Isotopic Ratio by Mass Spectrometer 超微量钐同位素丰度比的质谱测定 service.ilib.cn 5. Discussion ...
The N2 produced from the decomposition is used for measuring the abundance of masses 28 and 29 by mass spectrometry. From this ratio, the 15N atom fraction is calculated.Standard samples of N2, ammonia, orchard leaves and urea have been successfully analyzed to determine isotopic compositions. ...
Isotope ratio mass spectrometry is a specialized method used to obtain information about the biological, chemical, and geographic origins of substances. The isotope ratios of elements such as N, C, oxygen, hydrogen, and sulfur can become locally depleted or enriched due to different thermodynamic an...
Baffi, C., Trincherini, P.R. Food traceability using the87Sr/86Sr isotopic ratio mass spectrometry.Eur Food Res Technol242, 1411–1439 (2016). https://doi.org/10.1007/s00217-016-2712-2 Download citation Received04 February 2016 Revised03 May 2016 ...
Through the gas chromatographic/combustion/isotope ratio mass spectrometry (GC/C/IRMS) determinations of alditol acetate derivatives of monosaccharides, rapid analysis of the ja:math of individual sugars can be accomplished with a precision of approximately ±0.3‰. Fractionations in carbon occurring ...
The objective of the current experiment was to evaluate the effect of biofield energy treatment on the isotopic abundance ratio of PM+1/PM (2H/1H or 13C/12C or 15N/14N) in indole using the gas chromatography-mass spectrometry (GC-MS). The sample of organic compound indole was divided ...
气体稳定同位素比质谱法分析本底大气CO2的δ 13C和δ 18O Gas stable isotopic ratio mass spectrometry for measuring δ 13C and δ 18O in background atmospheric CO271阅读 文档大小:417.18K 7页 0025496上传于2015-06-26 格式:PDF 级联生产稳定同位素18O的模拟优化的研究 热度: 稳定性同位素13C标记小麦...
The isotopic analysis of N relies on the generation of a stable gas, typically N2, as the analyte for isotope ratio mass spectrometry. On-line combustion to N2 is the standard method for the preparation of a N sample for isotopic analysis. With current ‘off-the-shelf’ technology, a typic...