搜索结果: 1-15 共查到“质谱分析 GC/MS”相关记录48条 . 查询时间(0.049 秒)
为了研究钯催化的2,4-二甲氧基苯甲酸与烯丙基丙二酸二乙酯的脱羧Heck反应的产物结构，建立了（2,4-二甲氧基苯基）烯丙基丙二酸二乙酯同分异构体的分离与鉴定的气相色谱-离子阱质谱方法。首先通过脱羧Heck反应制得（2,4-二甲氧基苯基）烯丙基丙二酸二乙酯异构体混合物，然后利用GC/MS联用技术对混合物进行分析，得到各组分的EI和CI全扫描模式质谱信息。通过对照各组分的分子离子峰确定互为异构体的组...
为了准确分析挥发性酮、醇、酯、腈类化合物在废水中的残留情况，建立了顶空-气相色谱-质谱法测定废水中16种挥发性酮、醇、酯、腈类化合物的方法，选用DB-624（30 m×0.32 mm×1.8 μm）毛细管柱，在柱流速1.5 mL/min条件下，采用电子轰击电离源，全扫描定性，选择离子进行外标法定量。结果表明16种化合物线性良好，相关系数r>0.995。当废水取样量为10.0 L时，方法检出限为0....
持久性有机污染物(POPs)3-硝基苯并蒽酮（3-NBA）是一种极强的直接致突变和致癌物,多种动物试验以及人体细胞试验证明其具有极强的致突变能力。环境中的3-NBA主要来源于机动车尾气和大气光氧化反应，其在大气中浓度远低于多环芳烃。利用高效液相色谱（HPLC）法，分离、富集目标组分，再结合气相色谱质谱（GC/MS）技术，可建立大气中3硝基苯并蒽酮的检测方法，仪器检测限为13.7pg，方法检测限...
大气颗粒物中有机组分污染特征的研究，对我国城市空气质量监控与治理有重要意义。应用中流量PM2.5采样器采集2003年9月~2004年7月北京市大气颗粒物样品，建立了同时测定PM2.5中三类有机组分的实验方法。采用14%BF3/CH3OH溶液为有机酸衍生化试剂，并确定有机酸最佳衍生化反应温度和时间分别为40℃、45min；采用自填SPE硅胶柱，实现了正构烷烃、多环芳烃和有机酸酯的完全分离，三类组分回...
A headspace-GC/MS method for the determination of dimethylcyclosiloxane in enameled wires was developed. The dimethylcyclosiloxane such as hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, dec...
A purge and tram combining with solid-phase extracting method/GC-MS was applied in pretreatment on the detection of serial sorts of organic contaminant, such as phenols, polycyclic aromatic hydrocarbo...
A GC/MS-SIM method for the determination of dimethyl fumarate in leather and leather products was developed. The dimethyl fumarate was extracted from leather by dehydrous ethyl acetate using ultrasoni...
GC/MS法检测包装材料中的三聚氰酸残留
cyanuric acid gas chromatography-mass spectrometry(GC/MS) package materials
2010/3/30
A GC/MS method was developed for the determination of cyanuric acid residue in package materials. The detection was performed by mass spectrometry with electro-spray ion mode. The results show that th...
An essential oil was extracted from the traditional Tibetan medicine of Pyrethrum tatsienense by steam distillation method. The chemical components of the essential oil were analyzed by gas chromatogr...
吹扫捕集-GC/MS/SIM法测定食品接触材料的单体迁移量
materials in contact with foodstuffs migration of monormer purg&trap-GC/MS/SIM
2010/3/30
A purg & trap-GC/MS/SIM method for the determination of the migration of monomers such as vinylidene chloride, acrylonitrilein and 1,3-butadiene in water food simulants of materials in contact with fo...
The liquid product derived from coliquefaction of Shendong coal and sawdust was separated into several groups by employing open-column technique. And the heteroatom-contained compounds were isolated a...
GC/MS analytical technology was adopted to determine the liquid products derived from coliquefaction of Shenhua coal and sawdust in this contribution. The coliquefied oil was analyzed qualitatively an...
微波萃取-GC/MS法测定电子电气产品中的灭蚁灵
electrical and electronic products mirex microwave extraction GC/MS
2010/3/30
A method for the determination of mirex in electrical and electronic products was established by microwave extraction technique and GC/MS. The sample was extracted by microwave with mixed extractant c...
The essential oils from Saussurea tridactyla were extracted by steam distillation. The chemical components of the essential oils were analyzed by GC/MS, and 23 compounds were identified, which account...