With gas chromatographic and mass spectrum (GC-MS) analysis technology, the chemical composition of biomass tar and its distillations were analyzed.
主要采用色谱-质谱联机(GC - MS)成分分析法对生物质焦油及其馏分试样进行成分分析。
The compound structure is verified by melting point, IR, NMR, element analysis, mass spectrum and optical rotation.
所得最终产品经熔点、核磁、红外、元素分析、质谱和旋光度分析，证明与预期结构相符。
The results of mass spectrum analysis are discussed.
讨论了质谱分析结果。
Constant conductance method USES partial pressure measurement technology, which has no strict request to outgassing rate of mass spectrum analysis chamber.
固定流导法采用的是分压力测量技术，对质谱分析室的漏放气率的指标要求不高。
The structure of the a-long-chain alkylbetaines was characterized by chemical analysis, element analysis, infrared spectrum, nuclear magnetic resonance and mass spectrometry.
采用化学分析、元素分析、红外光谱、核磁共振及质谱等方法对产品进行了表征。
The highest concentration of mercury was found in the antennal glands by mass spectrum analysis.
质谱分析表明，触角腺中汞的含量最高。
Thermal degradation of polystyrene was investigated with thermogravimetry-mass spectrum analysis (TG-MS).
采用热重质谱法研究了聚苯乙烯的热降解过程。
The helium mass spectrum analyzes leakage analysis is one of the popular leak detection method.
氦质谱析漏是电子界较常用的无损检漏方法。
The method including the process of extraction chromatography and the mass spectrum measurement for the exact analysis of micro neptunium in the existence of large quantity of uranium is established.
建立了准确测定常量铀中微量镎的方法。方法包括萃取色层法分离和质谱法测量。
The aim and the method of mass spectrum analysis for residual gas and the differential pumping system, meanwhile, are introduced.
介绍进行残气质谱分析的目的，方法和采用的差分抽气质谱分析系统； 给出装置调试过程中常温和低温状态下残气谱图；
The aim and the method of mass spectrum analysis for residual gas and the differential pumping system, meanwhile, are introduced.
介绍进行残气质谱分析的目的，方法和采用的差分抽气质谱分析系统； 给出装置调试过程中常温和低温状态下残气谱图；
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