Various alkylbenzenes were separated on three different types, nonporous, macroporous (pore diameter; 30 nm), and microporous (pore diameter; 10 nm), C18 bonded silica columns under both isocratic and gradient elution. conditions. Under the isocratic conditions, column efficiency of nonporous silica...
matrix silica gel, high purity, spherical particle platform matrix active group C18 (octadecyl) phase particle size 5μm pore size 180 Å surface area 200 m2/g operating pH range 2 - 8 suitability suitable for L1 per USP mode of chromatography reversed phase Discovery® C18 高效...
C18-reversed phase silica gel推荐供应商 建议您优先选择企业会员,我们对企业会员产品有严格审核。 公司名称:SIGMAALDRICH推荐 联系电话:800 558-9160 电子邮件: 国籍:美国 产品介绍:纯度:for column chromatography, fully endcapped CB指数:87 网址:www.sigmaaldrich.com ...
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2) C 18 silica gel C_(18)-硅胶3) C_(18) extraction disk C_(18)膜 1. A technique based on automatic solid phase extraction with C_(18) extraction disk,followed by capillary gas chromatography with ECD,was employed in detecting 5 RCRA haloethers that cause cancer in human. 使用全...
COLUMN LIQUID CHROMATOGRAPHYCOLUMN PACKINGSSILICA GELPOROUS CARBONA column switching technique was developed to realize a group-type separation of PAHs and nitrogen containing PAHs (N-PAHs) applying a C18-immobilized polystyrene packing as well as a C18-modified silica stationary phase. On the first ...
In this paper [69], the authors were investigating the influence of adding different mixtures of surfactants including Tween 20 to the aqueous/methanolic MP on the retention factor of specific analytes separated by silica gel liquid chromatography. Silica gel SP was coated with the cationic ...
The purification was performed by silica gel column chromatography (cyclohexane-EtOAc, 75:25) to afford C18-EGCG (7.6 g, 53%) as a brown solid. 1H NMR (Acetone-d6, 400 MHz): δ = 0.87 (t, J = 7.4 Hz, 3H), 1.20–1.35 (m, 30H), 1.35–1.45 (m, 1H), 1.62–1.75 (m, 1H...
residue, and the mixture was extractedwith ethyl acetate. The organic layer was washed with saturated brine, and dried overmagnesium sulfate. The solvent was removed under reduced pressure, and the obtainedresidue was purified by silic...
When chromatography degrades it is often due to fouling wherein particulates from samples, mobile phases and/or the LC system start clogging pores and channels at the head of the column. The VanGuard FIT Cartridge replacements contain the same qualified sorbent as the analytical column and act ...