氟涂料中全氟辛酸(PFOA)及其盐类物质测定的气相色谱质谱法

全氟辛酸(perfluorooctanoic acid,PFOA)是一种强酸[1],分子式为C8HF15O2,是常用的氟表面活性剂,具有很强的疏水性和疏油性,广泛用于油库、机场、军事设施等场所的消防材料中,也是氟涂料、氟塑料和有机氟织物整理剂等的生产过程中不可缺少的原料。全氟辛酸具有中等毒性的肝致癌     

马齿苋及其籽中脂肪酸的比较研究

本实验利用ＧＣ－ＭＳ分析技术对马齿苋全草及其籽中的脂肪酸（以甲酯的形式）进行了分析，共鉴定出８种脂肪酸。全草中以亚麻酸（４７．１６％）、亚油酸（２２．００％）及棕榈酸（１７．４％）为主，籽中以亚油酸（４５．８６％）及亚麻酸（３０．６１％）为主。     

重油催化裂化汽油中含氮化合物的分析

利用酸萃取技术浓缩分离重油催化裂化（RFCC）汽油中的氮化物，比较了两种萃取剂和两种油剂比对分离效果的影响，结果发现选用10％（体积分数）HCl作萃取剂，油剂比为10：1（体积比）时，碱性氮化物的提取率较高；浓缩分离出的氮化物用色谱－质谱联用方法对其进行了检测，结果表明RFCC汽油中的氮化物主要是C0－C2苯胺及少量吡啶类、喹啉类碱性氮化物。     

SPME/GC-MS在综合评判苹果酒质量中的应用研究

利用顶空法固相微萃取与气相色谱-质谱联用鉴定了8种苹果酒中挥发性香气的主要成分；选取对苹果酒总体香气贡献较大的7种高级醇类和6种酯类，并以2-辛醇为内标，测定了它们的含量；并构建了高级醇类和酯类的模糊综合评判隶属函数模型；利用模糊综合评判法得出了5^#为最优苹果酒，6^#次之，与感官品评结果相一致，表明本文提出的方法可行，且比传统的方法更具有优越性、客观性，更能全面地利用酒样信息。     

Application of time-of-flight mass spectrometry to the analysis of phototransformation products of diclofenac in water under natural sunlight

Exact mass capabilities of time-of-flight (TOF) mass spectrometry along with other mass spectrometric techniques have been evaluated to elucidate a complete range of dichlofenac phototransformation products. Photolysis experiments with diclofenac in water under direct solar irradiation were performed to characterise the main phototransformation products generated and to determine their stability. Photolysis experiments were performed in both demineralised water and reconstructed standard freshwater. Samples were extracted before analysis by solid phase extraction (SPE) with Oasis HLB and MAX cartridges. Separation and identification of the transformation products were accomplished by the combined use of gas chromatography-mass spectrometry (GC/MS) and liquid chromatography coupled with time-of-flight mass spectrometry (LC/TOFMS). Both techniques provided complementary information that enabled the identification of 13 phototransformation products. Six of them were identified by GC/MS through the structural information provided by the full scan mass spectra obtained under electron impact (EI) ionisation and the confirmation of the molecular mass provided by positive chemical ionisation (PCI) analyses. Accurate mass measurements obtained by LC/TOFMS provided the elucidation of seven polar transformation products. The low mass error observed (<2 ppm) enabled the assignment of highly probable empirical formulas as well as identification of a process dimerisation route. The photoproducts identified demonstrated that photolysis of diclofenac occurs by two main routes. One is the consequence of the initial photocyclisation of diclofenac into carbazole derivatives. The other route goes through the initial decarboxilation of diclofenac and further oxidation of the alkyl-chain, which are typical photolytic process reactions. The main photoproduct identified was 8-chloro-9H-carbazole-1yl-acetic acid.     

GC-MS法测定焦化厂气溶胶中多环芳烃

利用气相色谱-质谱(GC-MS),电子轰击离子化(EI)法测定焦化厂气溶胶中多环芳烃的含量。超声波抽提气溶胶样品,用GC-MS的选择离子监测(SIM)方式测定EPA提出的优先监测的16种多环芳烃的含量。该法的检出限为0.167pg·m~(-3),PAHs的回收率为85.1％～110.5％,相对标准偏差为4.62％～19.4％。应用该法测定气溶胶中PAHs获得满意的结果。     

柴油烃族组成分布的GC-MS测定

应用GC－MS测定柴油烃族组成按沸点的分布，通过柱色 谱分离后的柴油饱和烃和芳烃组分分别进入气相色谱－质谱联用仪分析，采集其每一扫描的质谱图后，按ASTM－D2425方法计算其每一扫描的烃族组成，因为每一扫描与保留时间对应，所以可将两部分烃族组成加和后应用ASTM－D2887方法计算柴油烃族组成按沸点的分布规律；实验结果表明，该法与ASTM－D2887和ASTM－D2425的实验结果吻合，并能给出有关柴油烃族组成的详尽分布规律。     

Analysis of terpenoic composition of conifer needle oils by steam distillation/extraction,gas chromatography and gas chromatography-mass spectrometry

Summary The essential oils of Estonian spruce and pine needles have been analysed by a combination of steam distillation/extraction, GC and GC-MS. According to their monoterpene composition Estonian pines belong to a high carene chemotype with monoterpenes representing up to 85% of total oil. Estonian spruce needle oil contains up to 70% of oxygenated terpenes and more limonene and 1,8-cineole than the same spruce species [Picea abies (L.) Karst.] from other localities.A total of 60 components were identified. Coefficients of variation describe the range of component contents in individual trees within the population.     

GC-MS Analysis of the Essential Oil from the Oleoresin of Pistacia atlantica var. mutica

The oleoresin of Pistacia atlantica var. mutica, growing in different regions of Iran, is a popular naturally occurring chewing gum and has been used traditionally in the treatment of peptic ulcer. The GC-MS analysis of the essential oil, obtained from steam distillation of the oleoresin of P. Atlantica var. mutica, has led to the identification and quantification of eleven terpenoids, -pinene (70%), -pinene (1.94%), 3-carene (0.2%), carveol (2.18%), epoxypinene (2.15%), limonene oxide (9%), myrtenol (5.31%), limonene (0.62%), citral (5.72%), -phellandrene (0.2%), and -myrcene (0.3%). The total amount of essential oil obtained was 22% v/w which is higher than any other species of the genus Pestacia.     

珠江广州河段水中有机污染物的GC-MS分析

用吹扫捕集、树脂富集珠江广州河段海印断面水中有机物，毛细管色谱柱分离，用气相色谱－质谱联用方法测定有机污染物的组成，从水中鉴定出60个有机物，并作了定量分析；结果表明有机物种类多，污染较严重。