Osek O, Jaroszewska-Manaj J, Krawczyk W, Oszczapowicz J. Gas chromatographic analysis of tautomerizing amidines. Retention indices of N,N’-diphenylfromamidines on a nonpolar column. Journal of Chromatography 369: 398–402, 1986Oszczapowicz J, Orlinski R, Jaroszeweka J, Kaminska E. Cyanine...
【英语版】国际标准 ISO/TS 28581:2012 EN 水质 特定非极性物质的测定 使用气相色谱-质谱检测(GC-MS)的方法 Water quality — Determination of selected non-polar substances — Method using gas chromatography with mass spectrometric detection (GC-MS).pdf,ISO/TS
Non-polar lipids (NPL) were separated by silicic acid column chromatography from total lipids in epicotyl containing young leaves, hypocotyl and root. The glyceride (TG, DG, and MG), free fatty acid (FFA) and sterol lipid (SE) components in NPL were analyzed mainly by thin-layer and gas-...
aInverse gas chromatography has been used to study the adsorption of n-alkanes and other polar probes on different nonmicroporous carbons: nanotubes, nanofibers, and high-surface-area graphites. Moreover, properties such as enthalpy of adsorption, free energy of adsorption, and surface free ...
The two-dimensional gas chromatography/time-of-flight mass spectrometry system (Pegasus 4D; PerkinElmer Inc., Waltham, MA, USA) consisted of an Agilent 7890 GC and a TOF-MS. Analytes were initially separated on a non-polar DB-5MS column (30 m × 0.25 mm × 0.25 μm,...
The column exhibited unique selectivity for various organic substances, such as the homologous compounds of alkanes, esters, alcohols and aromatic compounds. ... X Sun,C Wu,J Xing - 《Journal of Separation Science》 被引量: 23发表: 2015年 The stereospecific solvation of non-polar organic solute...
real-time Faradaic efficiency of evolved O2 during the in situ deposition of Co-PH at 10 mA cm−2 is determined by monitoring the oxygen concentration in the headspace of gas-tight H-cell electrolyzer with an online Agilent 8890 GC gas chromatography (equipped with a GS-GASPP0 column)...
Dilution of the organic SPE eluate with water before RP chromatography is recommended to achieve refocusing on the column. For enrichment of very polar compounds that may not bind to SPE material, both vacuum-assisted evaporation [14] and freeze-drying [15] approaches have been applied ...
An ACQUITY UPLC BEH Amide column was used (100 × 2.1 mm, 1.7 μm) (Waters), and the column temperature was set at 40 °C. Gradient elution was performed at a flow rate of 0.3 ml min−1 with mobile phase A (90% H2O, 10 mM ammonia acetate, 0.2% acetic ...
polar analytes are then eluted upon increasing the composition of the aqueous eluent. However, the aqueous fraction of the eluent must not exceed a certain level (typically around 30% [128]), otherwise the water-enriched layer at the surface will disappear, and the column will change into ...