搜索结果: 46-60 共查到“分析化学 MS”相关记录201条 . 查询时间(0.084 秒)
Sialic acid and lysine as an internal standard substance, the ESI-MS fingerprinting of extracts of Compound Indigowoad Root Granule which from different origin was studied. The fingerprinting was obta...
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...
Rubusoside is a major sweet component in Rubus suavissimus S . Lee(sweet tea), which is a special product of Guangxi Province, China. A liquid chromatography-electrospray ionization mass spectrometry(...
鸡蛋中三聚氰胺的磁性强阳离子交换树脂吸附—LC-MS/MS快速分析
magnetic strong cation exchange resin melamine egg sample liquid chromatography-tandem mass spectrometry
2010/3/30
In the work, magnetic strong cation exchange(MSCX) resins were successfully prepared and applied to the extraction of melamine(MEL) from egg samples. The extraction procedure was carried out in a sing...
A simple and rapid method for the analysis of 12 bile acids was developed based on LC/MS. Quantification was finished in 7 min. For different bile acids, the detection limits ranged from 0.006 1 to 0....
ESI-MS/MS法鉴别环肽非对映异构体和碎裂机理的研究
ESI mass spectrometry cyclic peptides diastereomer distinguishing diastereomer
2010/3/30
The discrimination of four pairs of cyclic peptide diastereomers were successfully achieved by ESI-MS. The ratio of ions’ abundance ratios between A and B isomers in MS/MS spectra was defined as a par...
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...
ESI-MS analytical method was employed to study extracts of unprocessed and processed Radix Paeoniae alba. The results of the experiments prove that different processed methods is making a certain diff...
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...
The isoflavonoids from Iris tectorum were analyzed by electrospray ionization tandem mass spectrometry(ESI-MS/MS). Based on the information of pseudo molecular ions and daughter ions were obtained by ...
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...
磷酰化肽酯及小肽与氨基酸相互作用的ESI-MS研究
ESI-MS N-phosphoryl dipeptides(or methyl esters) amino acids non-covalent weak interaction
2010/3/30
The non-covalent interaction between a series of N-diisopropylphosphoryl dipeptides(or methyl esters) (DPP) and amino acids was studied by ESI-MS. The results show that aromatic rings to form π–π conj...
Triterpene and saponin in Radix ilicis pubescentis were identificated by HPLC-MS. The samlpe was extracted with methanol, and analyzed by HPLC-IT-MS and HPLC-TOF-MS to obtain the positive-ion and nega...