甘氨双唑钠及其一个微量成分的质谱研究

The synthesis of sodium glycidazole yields three products detected by HPLC. Electrospray ionization mass spectrometry has been successfully applied to identify the three products. ESI mass spectrometry demonstrated that the first component is 2-nitro-5-emthylimidazole as impurity and the third component is the target compound, sodium glycidazole, as main product. The second and the third components were further investigated by the scanning of the daughter ion at m/z 373[M H]^ , m/z 520[M H]^ using ESI tandem mass spectrometry. The experimental results show that the second component has the structure similar to the desired product but without one imidazolering.     

用GC／MS分离鉴定氯氰菊酯光学异构体

Cypermethrin optical isomer was separated and determined on cyclodixin capillary gas chromatograph with GC/MS/DS chromatography mass spectrometry. The result is satisfactory.     

同位素稀释质谱法在痕量有机物测量国际比对中的应用

This paper briefly describes the method and applications of isotope dilution mass spectrometry (IDMS) in international comparisons organized by Consultative Committee for Amount of Substance (CCQM).     

GC／MS定量分析芥子气

Quantitative analysis of mustard gas was carried out by gas chromatography /mass spectrometry (GC/MS). SIM standard curves were established by internal and external standards separately.     

热表面电离质谱精确测定人体排泄物中锌同位素丰度比

In this work isotope mass spectrometry was adopted for the study of determination of zinc absorption by using a double label stable isotope technique. The methods of the sample digestion, separation and measurement of trace zinc by using thermal ionization mass spectrometer were established, and the isotopic ratios of zinc in the excrements and urine were measured accurately. The reliable zinc absorption was obtained from this.     

硝酸盐中氮和氧同位素的正热电离质谱法测定

A new method for isotopic determination of N and O in nitrate based on CsNO2 with graphite load by positive thermal ionization mass spectrometry is present. The new method has been applied to determine N and O isotope in several nitrate reagents.     

DART-MS在中国的应用研究现状

敞开式离子化质谱（ambient ionization mass spectrometry, AIMS）技术因其具有实时、原位分析等特点，已成为质谱学领域的一个研究热点。实时直接质谱分析（direct analysis in real-time mass spectrometry, DART-MS）作为一种典型的直接质谱分析技术，可在开放环境中实现样品的快速分析，具有性能稳定、操作简单、分析快速等优点，自2005年被报道以来，便引起了广泛的关注。本文从DART电离源的工作原理以及近2年DART-MS在环境分析、食品药品安全、生物医学分析以及公共安全等领域的应用研究进行了评述，并对其发展方向进行了展望。     

平炉尘单颗粒物中多环芳烃的二次离子质谱研究

The aerosols from the Steel Plant collected by a low pressure impactor on aluminum foils have been analyzed by static secondary ion mass spectrometry (SIMS). The study has characterized a series of polycyclic aromatic hydrocarbons (PAHs) absorbed on the individual particle.     

AMS Activities in Japan and Outcomes

1 AMS ACTIVITIES IN JAPAN AND AROUND THE WORLD Following the first success of accelerator mass spectrometry (AMS) in detecting 14C by Muller in 1977, its technique was rapidly embraced by the low energy nuclear physicists with encouragement from several archaeologists, biologists and environmental scientists.     

小型高性能质子转移反应飞行时间质谱仪的研制及其在呼吸气成分分析中的应用

研制可快速、在线分析挥发性有机物(volatile organic compounds,VOCs)的质谱仪器是现代气态有机质谱的重要发展方向.本研究自行研制了小型高性能质子转移反应飞行时间质谱仪(proton transfer reaction time of flight mass spectrometry,PTR-...