有机磷化合物的质谱研究(Ⅵ)——磷酰二胺酯类化合物的电子轰击质谱和化学电离质谱

本文报道了7种新的N-烷基-N′-乙氧羰基甲基-N′-芳磺酰基-O-乙基磷酰二胺酯化合物的电子轰击质谱(EIMS)和化学电离质谱(CIMS,甲烷为反应气)。结果表明,无论是EIMS,还是CIMS均存在较多的骨架重排离子峰;取代基对谱图有较大的影响;EIMS中P—N键的断裂为重要质谱特征,CIMS中MH~+准分子离子为重要特征离子,还存在分子离子反应的产物。     

有机磷化合物的质谱研究(Ⅶ)——二氮二磷杂环戊烷衍生物的化学电离质谱

本文报道了七种4.5-二氧代-2-硫代-1,3,2,4-二氮二磷杂环戊烷衍生物的化学电离质谱(CIMS,甲烷为反应气),结果表明:CIMS中准分子离子MH~+为基峰离子;MH~+离子易发生失去H_2S,CO,C_3H_6等小分子的裂解,(M+C_2H_5)~+离子存在再断裂。     

质谱法测定冰毒

采用直接进样化学电离（ＣＩ）质谱法，配合电子轰击（ＥＩ）及气相色谱－质谱联用（ＧＣ／ＭＳ）技术，测定了冰毒及其制备过程中的副产品与中间产物，为刑侦破案提供了依据。     

Stratospheric chemical ionization mass spectrometry: nitric acid detection by different ion molecule reaction schemes

Detailed height profiles of stratospheric nitric acid mixing ratios have been derived with a baloon borne chemical ionization mass spectrometer by applying several ion molecule reaction schemes, each associated to a specific and selective ion source. These ions (CO₃⁻, Cl_n⁻, CF₃O⁻, and CF₃O⁻H₂O) give rise to specific product ions (mainly CO₃⁻HNO₃, NO₃⁻HCl, NO₃⁻HF, and CF₃O⁻HNO₃) upon reaction with ambient nitric acid molecules. This paper reports on the instrumental details as well as on the results obtained during two balloon flights with the instrument. Within the accuracy of the measurements, the nitric acid height profiles obtained with the three different ion sources are in good agreement with one another as well as with literature data.     

Oxygen anion (O−) and hydroxide anion (HO−) reactivity with a series of old and new refrigerants

The reactivity of a series of commonly used halogenated compounds (trihalomethanes, chlorofluorocarbon, hydrochlorofluorocarbon, fluorocarbons, and hydrofluoroolefin) with hydroxide and oxygen anion is studied in a compact Fourier transform ion cyclotron resonance. O⁻ is formed by dissociative electron attachment to N₂O and HO⁻ by a further ion‐molecule reaction with ammonia. Kinetic experiments are performed by increasing duration of introduction of the studied molecule at a constant pressure. Hydroxide anion reactions mainly proceed by proton transfer for all the acidic compounds. However, nucleophilic substitution is observed for chlorinated and brominated compounds. For fluorinated compounds, a specific elimination of a neutral fluorinated alkene is observed in our results in parallel with the proton transfer reaction. Oxygen anion reacts rapidly and extensively with all compounds. Main reaction channels result from nucleophilic substitution, proton transfer, and formal H₂⁺ transfer. We highlight the importance of transfer processes (atom or ion) in the intermediate ion‐neutral complex, explaining part of the observed reactivity and formed ions. In this paper, we present the first reactivity study of anions with HFO 1234yf. Finally, the potential of O⁻ and HO⁻ as chemical ionization reagents for trace analysis is discussed.     

自旋阀中电流诱导磁化翻转行为的研究

通过实验研究了一种特殊的反对称自旋阀结构．研究发现,随着外加磁场的增大,该结构纳米器件表现出了一种由“逆CIMS”向“正常CIMS”的转变．这种现象是因为：该反对称自旋阀在不同的外加磁场下有不同的磁化取向,因而引起不同的CIMS行为． 关键词： CPP ESPV CIMS     

CIMS环境下技术创新的组织

本文探讨了ＣＩＭＳ环境下企业技术创新的组织问题，提出了ＣＩＭＳ环境下技术创新的组织结构和组织形式，为ＣＩＭＳ环境下企业技术创新组织的重构提供了参考。     

CIMS下基于成组单元的无能力约束的生产批量计划的新方法

CIMS中基于成组单元的生产批量计划问题是确定属于M个族的N种不同的项目在给定的计划范围T内的每一个时间段上的批量，使得在T内项目总的调整费用（族调整费用和项目调整费用之和）和库存保管费用以及生产费用之和最小（GTLS）本文基于GTLS问题的性质，从一个新的角度即从调整变量出发，运用遗传算法（GA）随机搜索进行求解．对GTLS构造了两阶段启发式算法（Heuristic），通过仿真实验，测试6个问题表明，GTLS／GA比GTLS／Heuristic平均改善5％以内．     

Coupling of high temperature glass capillary columns to a mass spectrometer. GC/MS analysis of metalloporphyrins from Julia Creek oil shale samples

This paper reports on the instrumental and experimental prerequisites of the combination of high temperature gas chromatography (HTGC) with electron impact- (El) and chemical ionization (Cl) mass spectrometry (HTGC/EI/CIMS). It describes a newly developed high temperature GC/MS interface in detail and discusses the particular problems arising in HTGC/MS. The capabilities of the system are demonstrated by direct analyses of nickel- and vanadyl porphyrins, extracted from Julia Creek oil shale. The use of CI/NH₃ in the GC/MS analysis of metalloporphyrins is demonstrated for the first time.     

CIMS(计算机集成制造系统)中CAD产品模型的建立

介绍了回转体零件建模体系结构，根据该建模体系的结构建立相应的数据结构模型，利用ObjectARX2000,VisualC 6.0从AutoCAD2000中提取出零件的几何参数，对该参数进行处理，生成主特征链表及局部特征链表，并最终建立CIMS中的CAD产品模型。