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。
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.
探讨该化合物的质谱特征离子与裂解途径，提供莽草酸的质谱学基础。
The characteristic ions and fragmentation patterns of shikimic acid were discussed by EIMS, ESIMS and MS/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 structure of objective product was confirmed by characterization with Fourier transform infrared spectrum (FTIR), nuclear magnetic resonance (1H NMR) and mass spectrometer (MS).
智能解释程序，应用从大约2000个烃类化合物质谱提取的结构-谱图联系规律，解释质谱推导分子结构。
The intelligence program infers molecular structure of hydrocarbon using spectrum-structure correlation rules inferred from about 2000 reference spectra of hydrocarbons.
该成果对质谱中的热电离理论进行了较深入地讨论，建立了高精度质谱测定锂铟铈同位素的方法。
The theory of thermal ionization mass spectrometry has been deeply discussed and the procedures for high-precision measurement of isotopes of lithium, indium and cerium have been established.
以化学衍生结合电喷雾电离质谱（ESI-MS/MS）法研究银莲花素A的质谱裂解方式。
The fragmentation pathway of raddeanin A was studied by electrospray ionization mass spectrometry(ESI-MS/MS) together with chemical derivatization.
文中介绍了质谱解析的基本方法，讨论了利用开放式可扩充体系结构MA TLAB语言开发综合性计算机辅助质谱解析初级专家系统的构想和设计思想。
The paper introduced the MS analysis method and discusses the design and application of the expert system for MS analysis based on the opening and expansion structure of MATLAB language.
首次分离、纯化了甲基化反应的重要副产物，经元素分析、氢谱、质谱确定为双甲基化产物。
A byproduct in the methylating reaction was separated, purified and determined to be of the dimethylated product for the first time.
染料分子的化学结构通过1H核磁共振谱，二维1 H - 1h相关谱以及质谱分析得以确定。
The chemical structure of dye molecule was confirmed by 1h nuclear magnetic resonance spectroscopy, 1h-1h COSY and mass spectrometry.
电喷雾质谱是目前应用最广泛的生物质谱技术之一。
The electrospray ionization mass spectrometry(ESI MS)was one of the most widely applicable bio-MS technologies.
本文通过GC／MS／DS检索，人工解析质谱与标准质谱对照的方法，从红橙皮油中分析鉴定了49个成分。
The chemical constituents of red orange oil were studied by use of GC/MS/DS in this paper, 49 constituents were identified.
产物经红外光谱1、H 核磁共振谱、质谱和X射线衍射确定结构。
The products were determined through IR, 1H NMR, MS and X-ray single crystal diffraction.
利用台式飞行时间质谱的中分辨本领，研究了牡荆素的电子轰击质谱的裂解规律，对裂解途径进行了完全的指认。
Using moderate resolution capabilities of a desk time-of-flight (TOF) instrument, the fragmentation regularity from electron impact mass spectra of vitexin was studied.
通过推测甾醇TMS衍生物特殊碎片的质谱裂解规律，结合标准品TMS衍生物的质谱图进行分析。
The regular mass spectrometric pattern of the TMS derivatives of sterols was studied using mass spectrometry and some TMS derivatives standards.
分压强质谱计校准装置用于质谱计的校准。
A novel system used to calibrate partial pressure mass spectrometer was developed.
阐述了新一代ICP - MS在有色金属材料痕量元素检测分析中质谱干扰和非质谱干扰问题及其克服新技术。
It discusses the mass spectral interference and non-interference in the detection of trace elements in non-ferrous materials by using a new generation of ICP-MS and its new technology.
概述了电喷雾电离质谱(esi - MS)、基质辅助激光解析电离质谱(MALDI - MS)的原理。
The principle of electrospray ionization-mass spectrometry (ESI-MS) and matrix assisted laser desorption ionization-mass spectrometry (MALDI-MS) is described.
结果表明：胆甾醇酯的EI质谱裂解途径主要由甾环决定，各化合物谱图之间几乎无差别；
The result shows that EI fragmentation process of cholesterol esters is determined mostly by the steroid nucleus, and there is almost no difference among the mass spectra of various compounds.
质谱计的优点之一是它能记录少量物质的质谱。
One of the advantages of the mass spectrometer is that it can record spectra from small quantities of substance.
用红外光谱MALDI-TOF质谱和同步X 射线吸收谱以及计算机模拟对NDH进行了鉴定和表征。
NDH was identified and characterized with infrared (IR), MALDI-TOF mass, and synchrotron X-ray absorption spectroscopies (XAS), and with computer simulations.
由于这些生物碱的结构相似，在电喷雾串联质谱中碎裂方式相同，因此根据电喷雾串联质谱结果确定了这些生物碱的结构。
Electrospray ionization tandem mass spectrometry(ESI-MSn) was applied for simultaneous determination of norditerpenoid alkaloids in the roots of Aconitum kusnezoffii without any chemical isolation.
睿米的氦质谱检漏仪维修，代表着国内最高水平。我们的维修可以做到电路级别，质谱室级别，国内唯一。
RealMeter represents the highest industrial-level, especially for some famous helium leak detector brand. RealMeter is the onlyone whose maintenance can be done at the circuit level in China.
利用红外光谱（ATR）、质谱（MS）及裂解气相色谱质谱（PYGC MS）等方法分析了硅橡胶老化机理。
In order to reveal the aging mechanism, the analyses of infrared attenuated total reflection (ATR), mass spectrum (MS) and pyrolysis gas chromatograph-mass spectra (PYGC-MS) were performed.
在概述目前已知具时代意义的生物标志物基础上，介绍利用气相色谱质谱质谱技术研究塔里木盆地柯克亚地区原油油源的应用实例。
On the basis of describing the biomarkers, the application of GC-MS-MS in studying the source rocks of Kekeya Area of Tarim Basin is introduced.
通过高分辨质谱测定，研究六种哌嗪衍生物的质谱裂解机理。
The mechanism of mass spectral fragmentation of six piperazine derivatives has been studied by measurement of high resolution mass spectrometry.
并通过质谱、红外谱图和核磁共振谱确认了其结构。
采用红外光谱、核磁共振氢谱、质谱等方法对1-(1 -环己烯)基二茂铁的结构进行鉴定，并介绍了一种较为方便的合成方法。
The structure of 1 - (1-cyclohexene) ferrocene is analyzed by IR, 'HNMR, MS and a method of synthesis is introduced in this paper.
用气相色谱质谱和场解吸质谱方法研究聚碳酸酯的乙醇萃取物。
The oligomer structure in polycarbonate(PC)was studied by combination of GC-MS and FD-MS in the ethanol extract of PC.
用气相色谱质谱和场解吸质谱方法研究聚碳酸酯的乙醇萃取物。
The oligomer structure in polycarbonate(PC)was studied by combination of GC-MS and FD-MS in the ethanol extract of PC.
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