Results 261 to 270 of about 97,740 (305)

Review On: RP-HPLC

Pharmaceutical analysis plays a vital role in determining the qualitative and quantitative composition of materials, essential for understanding sample characteristics. Analytical chemistry rifts into two branches qualitative, which classifies components, and quantitative, which measures them.
Akshata M. Girase, Bhupendra M. Mahale, Amitkumar R.Dhankani, Sunil p. pawar   +3 more
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[RP-HPLC characteristics of dragon's blood].

Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 2008
To study the fingerprint of dragon's blood resina draconis by high performance liquid chromatography.The samples are extracted with methanol and separated on a Eclipse XDB-C18 column (4.6 mm x 150 mm, 5 microm) with the mobile phase of acetonitrile-H2O in gradient mode, and the flow rate was 1.0 mL x min(-1), the detection wavelength was 275 nm and the
Xiu-Li, Gao, Qian, Jiang, Peng-Jiao, Wang, Min, Zhang   +3 more
openaire   +1 more source

Resolution Optimization in Ion-Interaction RP-HPLC.

Analytical Letters, 1997
Abstract Since in ion-interaction chromatography the dependence of the retention on the concentration of the ion-interaction reagent (IIR) follows different behaviours for the different analytes, the adjustment of IIR concentration can usefully be used to optimize resolution.
M. C. Gennaro, R. Aigotti, S. Angelino
openaire   +1 more source

A NOVEL PACKING MATERIAL FOR RP-HPLC

Journal of Liquid Chromatography & Related Technologies, 2000
A simple, practical, and economical procedure had been developed to prepare novel C18 ether-bond reversed phase packing. A soft and long C18 alkyl chain was coupled onto silica (Sinopak-S, particle size d = 5μm, pore diameter Dp=11nm, and surface area s=170m2/g) with γ-glycidoxypropyltrimethoxysilane as a coupling agent.
Yu Xin, Zhao Rui, Liu Guoquan
openaire   +1 more source

[RP-HPLC characteristics of Panax notoginseng].

Yao xue xue bao = Acta pharmaceutica Sinica, 2008
To develop the chemical characteristics of Panax notoginseng in order to control its quality.The samples was extracted using pressurized liquid extraction (PLE) and analyzed by HPLC-DAD. The data were evaluated using the "similarity evaluation system for chromatographic fingerprint of TCM" software (version 2004A).The chromatographic characteristics of
Jian-bo, Wan, Shao-ping, Li, Yi-tao, Wang   +2 more
openaire   +1 more source

Razdvajanje bjelančevina žitarica RP-HPLC metodom

2005
Za analizu bjelančevina žitarica, zbog njihove heterogenosti, slabe topljivosti i tendencije polimerizaciji razvijaju se i primjenjuju nove metode kojima se postiže bolja rezolucija i ponovljivost pri razdvajanju. Širu primjenu našle su elektroforetske i kromatografske metode.
Horvat, Daniela, Šimić, Gordana, Sudar, Rezica, Jurković, Zorica   +3 more
openaire   +2 more sources

Proteolytic Cleavage in RP-HPLC Solvents

1987
Successful degradation of the very resistant human complement component C3 (Mr 187,500) with trypsin in the presence of 2-propanol (1) has prompted us to examine the effects of the lower alcohols and acetonitrile during degradation with some commonly used endoproteases. The benefits might be threefold.
openaire   +1 more source

Studio RP-HPLC di derivati fulleropirrolidinici

2003
La ritenzione cromatografica (espressa dal fattore di ritenzione, k’) su fasi stazionarie per HPLC inversa è proporzionale alla lipofilia dei soluti. La ritenzione è ovviamente dipendente anche dalla composizione della fase mobile, in particolare dalla natura e percentuale del solvente organico.
ANGELINI, Guido, P. De Maria, FONTANA, Antonella, M. Pierini, S. Schergna, L. Tedeschi, C. Villani   +6 more
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[Determination of gelsemium alkaloids by RP-HPLC].

Yao xue xue bao = Acta pharmaceutica Sinica, 1994
Gelsemium elegans Benth is a kind of traditional Chinese medicine, eight alkaloids have been isolated from this herb. In recent years, an HPLC method for the separation and determination of five of these alkaloids, ie. gelsemium A (G), koumine (F), kumantenidine (D), kumantenine (B) and kumantenmine (A) is described, dichroine being used as the ...
S R, Luo, T, Li, J S, Yang
openaire   +1 more source

[RP-HPLC fingerprint of milk Stellera chamaejasme].

Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials, 2013
To establish a RP-HPLC fingerprint of milk Stellera chamaejasme.The gradient elution mode was applied in chromatographic separation, and data were analysed by "Computer Aided Similarity Evaluation" software to compare the quality of milk Stellera chamaejasme samples from different habitats.Samples from different habitats were of high similarity, and ...
Xue-Wei, Ji, Mei-Ling, Hao, Xia, Yang, Yu-Hua, Wang   +3 more
openaire   +1 more source