Two chromatographic methods for the quantitative determination of some pesticides applied for cucumber pests in Egypt

2018 ◽  
Vol 1 (5) ◽  
pp. 334-342 ◽  
Author(s):  
Rehab M. Abdelfatah ◽  
Amira M. Hegazy ◽  
Hamada M. Mahmoud ◽  
Mohamed A. Elsayed
Keyword(s):  
Quantitative Determination ◽  
Chromatographic Methods

Supercritical fluid (CO2) chromatography for quantitative determination of selected cancer therapeutic drugs in the presence of potential impurities

2015 ◽  
Vol 7 (3) ◽  
pp. 1092-1097 ◽  
Author(s):  
Venkata Narasimha Rao Ganipisetty ◽  
B. Ravi ◽  
Ch. Rajsekhara Reddy ◽  
RajKumar Gurjar ◽  
P. Manoj ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
Supercritical Fluid ◽  
Chromatographic Methods ◽  
Therapeutic Drugs ◽  
System P ◽  
Supercritical Fluid Co2

In the present study, supercritical fluid (CO2) chromatographic methods were validated for the estimation of two cancer therapeutic drugs, fulvestrant and azacitidine, using UPC2system.

Chromatographic Methods for Quantitative Determination of Ampicillin, Dicloxacillin and Their Impurity 6-Aminopenicillanic Acid

2017 ◽  
Vol 56 (3) ◽  
pp. 209-215 ◽  
Author(s):  
Maha M Abdelrahman ◽  
Ibrahim A Naguib ◽  
Mohamed A Elsayed ◽  
Hala A Zaazaa
Keyword(s):  
Quantitative Determination ◽  
Chromatographic Methods

Back Cover: Two chromatographic methods for the quantitative determination of some pesticides applied for cucumber pests in Egypt

2018 ◽  
Vol 1 (5) ◽  
pp. NA-NA ◽  
Author(s):  
Rehab M. Abdelfatah ◽  
Amira M. Hegazy ◽  
Hamada M. Mahmoud ◽  
Mohamed A. Elsayed
Keyword(s):  
Quantitative Determination ◽  
Back Cover ◽  
Chromatographic Methods

scholarly journals Стандартизація сухого екстракту стулок квасолі за вмістом флавоноїдів

2018 ◽  
Author(s):  
L. V. Vronska
Keyword(s):  
Phenolic Compounds ◽  
Phaseolus Vulgaris ◽  
Quantitative Determination ◽  
Ferulic Acid ◽  
Test Solution ◽  
Hypoglycemic Effect ◽  
Dry Extract ◽  
Chromatographic Methods ◽  
Dry Substance

Introduction. The development of new drugs for treatment and prevention of diabetes is a challenge that is an urgent matter in the context of the increase of diabetes morbidity. The hypoglycemic effect of phaseolus vulgaris pods infusion is established. The development of technology of phaseolus vulgaris pods dry extract, the study of its hypoglycemic effect is possible only by determination of the composition of the extract and its standardization.The aim of the study – to develop methods of phaseolus vulgaris pods dry extract identification; to develop and validate the technique of quantitative determination of flavonoids; to advance the quality criteria of the extract.Research Methods. Qualitative composition of flavonoids was investigated by means of chromatographic methods; quantitative determination was conducted by spectrophotometric technique.Results and Discussion. The research of phenolic compounds of phaseolus vulgaris pods dry extract by chromatographic methods allowed identifying rutin, isoquercitrin, ferulic acid and quercitrin in trace amounts. In addition to the phenolic compounds, the extract contained a large quantity of an unidentified flavonoid, a zone of which on the thin-layer chromatogram was situated between the zones of chlorogenic acid and rutin; two hydroxycinnamic acids, the zones of which were below and above the ferulic acid, and probably were their derivatives. The analysis of electronic spectra of absorption of a standard rutin sample solution and a dry extract test solution within the conditions of quantitative determination with aluminum chloride allowed using rutin as a standard for evaluation of flavonoids content. The content of flavonoids was determined by the spectrophotometric method, it was 0.7-0.8% range expressed in rutin and dry substance for different series of the extract.Сonclusions. To identify the dry extract of phaseolus vulgaris pods it was suggested to choose rutin, isoquercitrin and ferulic acid as active markers. The scheme of the chromatogram, which should be corresponded to the chromatogram of the test solution with the identification of dry extract, was recommended. The content of flavonoids was advised as a quantitative criterion of quality: not less than 0.65% expressed in rutin and dry substance.

QUANTITATIVE CHROMATOGRAPHIC METHODS: PART 6. IMPROVED PROCEDURE FOR DETERMINATION OF AMINO COMPOUNDS ON PAPER CHROMATOGRAMS

1961 ◽  
Vol 39 (2) ◽  
pp. 427-437 ◽  
Author(s):  
E. Tigane ◽  
E. H. M. Wade ◽  
J. Tze-Fei Wong ◽  
C. S. Hanes
Keyword(s):  
Quantitative Determination ◽  
Paper Chromatography ◽  
General Applicability ◽  
Chromatographic Methods ◽  
Factors Influencing ◽  
Amino Compounds

A procedure is described for the quantitative determination of amino compounds separated by paper chromatography. The procedure is of general applicability, and more specifically has been extensively applied to the standard P-E-PP and P-E-T chromatograms. Recovery data from these chromatograms have been obtained, and the various factors influencing the accuracy of analysis are discussed.

Quantitative Determination of Synthesized Genotoxic Impurities in Nifuroxazide Capsules by Validated Chromatographic Methods

2018 ◽  
Vol 101 (2) ◽  
pp. 385-393
Author(s):  
Nada S. Abdelwahab ◽  
Nouruddin W. Ali ◽  
Marco M. Zaki ◽  
M. Abdelkawy ◽  
Mohammed T. El-Saadi
Keyword(s):  
Quantitative Determination ◽  
Chromatographic Methods ◽  
Genotoxic Impurities
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