同位素峰

有机质谱同位素峰丰度分布的BASIC计算程序

A basic program for calculating isotopic peak abundances of organic molecules in mass spectrum

有机质谱中同位素峰的丰度计算和理解

Abundance Calculation and Understanding of Isotopic Peak in Organic Mass Spectrometry

pPreITMS系统是针对离子阱数据，利用机器学习中的最大期望方法和决策树方法分别识别出质谱中的噪音基线和同位素峰的预处理系统。

PPre_ITMS is a preprocessing system for ion trap MS / MS data , which uses the expectation maximization method and decision tree to recognize the noise baseline and first isotopic peaks , respectively .

在78.0355u±10mu范围内仅有C2H7NS（正离子质量78.0377u）可能产生质量干扰，但其可由M+2的同位素峰判断区别。

The only mass interference within 78.035 5u ± 10mu is C 2H 7NS ( positive ion 78.037 7u ) and the difference can be discriminated by ( M + 2 ) isotope peak .

该系统使用单束法能测定13个同位素峰。

This system can determine 13 isotopic peaks by single beam method .

质谱同位素峰重叠的剥离方法和应用

Analysis of the Overlap of Isotopic Peaks in Mass Spectrometry and its Application

微量气样中氦同位素的质谱峰高比测定法

The Measurement of Mass Spectrometric Peak Height Ratio of Helium Isotope in Trace Sample

通过离线γ谱学方法测量了Ba样品的γ射线单谱，根据Ba同位素特征γ射线峰的强度及其它相关数据计算了Ba同位素的生成截面。

The Ba fraction was measured by off-line γ - ray spectroscopy . The cross sections of the individual Ba isotope were calculation based on the intensities of the character γ - ray peaks of Ba isotopes and other relative information .

对样品形态选择、离子转换效率、离子传输效率和离子接收效率进行研究，消除了浓缩同位素测量时强峰拖尾对弱峰的干扰及同量异位素干扰。

The ionization efficiency of the samarium , as well as the ion transmission efficiency and the receive efficiency were researched . The interference of the tail peak that coming from the strong peak was eliminated and the isobars of Sm was not found .

根据氯同位素和硅同位素离子峰相对强度推测了离子碎片组成和这类化合物的质谱裂解规律。

According to relative intensity of isotopes of chlorine and silicon , the compositions of fragments and fragmentation regularities of mass spectra were inferred .