This essay introduces the theory and method of helium mass-spectrum leak detection for vacuum system of condenser.
本文系统地介绍了凝汽器真空系统氦质谱检漏原理和方法。
Gas phase chromatography, mass spectrum and infrared spectrum are used to characterize the novel silanes structures.
应用气相色谱质谱和红外光谱表征了它们的分子结构。
Accurate position of mass spectrum peak was ascertained through mass calibration for instrument.
对仪器进行质量校正，以确定正确的质谱峰位置。
The IR spectrum and mass spectrum show that the CH film mainly consists of polystyrene.
红外光谱和质谱分析表明薄膜的主要成分是聚对二甲苯。
Steranes and terpanes exist in saturated hydrocarbon component of oil and source rock, and they are usually identified by gas chromatogram-mass spectrum.
甾萜类化合物存在于原油和生油岩的饱和烃组分中，通常用色谱-质谱法鉴定。
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。
METHODS Gas chromatography mass spectrum(GC MS) was employed to detect the concentration of 3 MCPD in the blood after ig.
方法采用毛细管气相色谱质谱（GCMS）联用法测定大鼠血液中3MCPD的含量。
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。
Such current disturbs the zero out-put basic line of the light mass number region, so that it's very difficult to measure and record the height of spectrum peaks of the light mass number region.
这种电子流对轻质量部分质谱的零输出基线起干扰作用，致使这部分谱峰的峰高不能很好地测量和记录。
Second, aimed at the ionization and dissociation mass spectrum of trimethylamine.
针对三甲胺的电离解离质谱。
The structure of objective product was confirmed by characterization with Fourier transform infrared spectrum (FTIR), nuclear magnetic resonance (1H NMR) and mass spectrometer (MS).
并通过傅里叶变换红外光谱（FTIR）、核磁共振谱图（1HNMR）以及质谱（MS）对产物进行了表征，确定了目标产物的结构。
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。
Phase distributions of heavy metals in pyrite were analyzed by inductively coupled plasma mass spectrum with sequential extraction procedure.
以分级提取-电感耦合等离子体质谱考察了黄铁矿中重金属的相态分布。
Study of the burst energy, duration, interval and spectrum suggested that this source could be a strange star accreting matter from its low - mass companion.
天文学家对它的能量持续时间间隔时间和光谱进行了研究，发现它可能是一颗正在吸取伴星物质的奇异星。
The results of mass spectrum analysis are discussed.
讨论了质谱分析结果。
The probability mass function of queueing delay, the autocorrelation and power spectrum of delay jitter for this periodic cell stream are derived.
得出了该路周期性信元流的排队时延分布、时延抖动的自相关函数和功率谱。
And although there is a great mass of similarity in infrared spectrum, the results still show differences in the characteristic peaks of infrared spectrum between unzymic and zymic Pu'er tee.
根据红外光谱的特征峰形和吸光度比不仅可以区分生普和熟普，而且有可能区分生普或熟普的不同品质级别。
A model of mass transfer coefficients in liquid phase near free gas-liquid interface is developed based on the energy spectrum functions of isotropic turbulence.
摘要在单涡模型的基础上，根据各向同性湍流的能谱函数，考虑不同尺度的旋涡对气液传质的影响，建立了气液自由界面传质系数模型。
Volume II covers an equally wide spectrum, from mass spectrometry to embryonic stem cells.
从群众测谱学在胚胎的干细胞把II保险一同样宽范围收集成卷。
We also present theexpressions for the excitation spectrum, lifetime, and effective mass of quasi-particles.
又根据量子多体理论，计算了准粒子的激发谱、寿命和有效质量。
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。
IR spectra, mass spectrum and 1H NMR characterize it. Its surface tension, cmc, emulsification, moistening property, froth property and complex property are tested.
采用红外、质谱、核磁氢谱对正辛基聚葡萄糖苷进行了表征，并对其表面张力、临界胶束浓度、乳化性能、润湿性能、泡沫性能和复配性能进行了测试。
In addition, we discuss a possible mass spectrum of t (tt) family.
此外，还讨论了t (t)家族的实量谱。
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 subcellular localization and mass spectrum identification of the protein m 24 ku, pI 6.
叶片和茎尖的亚细胞定位和质谱鉴定研究。
A primary measurement of mass spectrum on Tokamak KT-5 is presented.
本文介绍了KT—5托卡马克装置质谱测量的初步结果。
The structures and compositions of the purified petroleum acids were characterized by using infra-red spectrum, nuclear magnetic resonance and negative-ion electrospray ionization mass spectrum.
通过红外光谱、核磁共振和负离子电喷雾质谱三种表征技术鉴定了原油中的石油酸结构和组成。
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。
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。
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