公开(公告)号：US20130206980A1

公开(公告)日：2013-08-15

申请号：US13832564

申请日：2013-03-15

Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY

Inventor： Anthony S. MENNITO ,  Kuangnan QIAN

IPC: H01J49/26

CPC classification number: H01J49/26 ,  G01N33/2835 ,  H01J49/164

Abstract: A method for characterizing the saturates portion of a petroleum or hydrocarbon sample that includes compounds with boiling points of 1000° F. (538° C.) or higher includes use of laser desorption ionization (LDI) to desorb and vaporize petroleum saturates into the gas phase. After ionization, the saturate compounds cations can be detected using mass spectrometry. The mass spectrum generated from the ionized saturated compounds is then characterized by assigning molecular formulas to any “detected” masses that exhibit a peak with an intensity greater than a defined signal to noise threshold. After making the molecular assignments, the abundance of each assigned molecule can be determined based on the signal magnitude of the peaks in the mass spectrum. The assigned molecules and the corresponding abundances can then be grouped based on a variety of factors.

Abstract translation: 用于表征包括沸点为1000°F（538℃）或更高沸点的化合物的石油或烃样品的饱和部分的方法包括使用激光解吸电离（LDI）将石油饱和物解吸并蒸发到气体中 相。 电离后，可以使用质谱法检测饱和化合物阳离子。 从电离的饱和化合物产生的质谱图的特征在于将分子式分配给任何“检测到的”质量，其表现出具有大于定义的信噪比阈值的强度的峰。 在进行分子分配之后，可以基于质谱中峰的信号幅度来确定每个分配的分子的丰度。 分配的分子和相应的丰度可以根据多种因素分组。

公开(公告)号：US20130187036A1

公开(公告)日：2013-07-25

申请号：US13716358

申请日：2012-12-17

Applicant: ExxonMobil Research and Engineering Company

Inventor： Anthony S. MENNITO ,  Kuangnan QIAN

IPC: H01J49/26

CPC classification number: H01J49/26 ,  G01N33/2835 ,  H01J49/164

Abstract: A method for characterizing the saturates portion of a petroleum or hydrocarbon sample that includes compounds with boiling points of 1000° F. (538° C.) or higher includes use of laser desorption ionization (LDI) to desorb and vaporize petroleum saturates into the gas phase. After ionization, the saturate compounds cations can be detected using mass spectrometry. The mass spectrum generated from the ionized saturated compounds is then characterized by assigning molecular formulas to any “detected” masses that exhibit a peak with an intensity greater than a defined signal to noise threshold. After making the molecular assignments, the abundance of each assigned molecule can be determined based on the signal magnitude of the peaks in the mass spectrum. The assigned molecules and the corresponding abundances can then be grouped based on a variety of factors.