Results 221 to 230 of about 25,870 (262)
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HPTLC–densitometric and HPTLC–MS methods for analysis of flavonoids
Journal of Liquid Chromatography & Related Technologies, 2018ABSTRACTHPTLC silica gel plates without and with fluorescence indicator F254 in combination with n-hexane–ethyl acetate–formic acid (20:19:1, v/v/v) as a developing solvent were explored for the HP...
Urška Jug +3 more
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Analytical and Bioanalytical Chemistry, 2006
Two new HPTLC methods for quantification of isopropyl-9H-thioxanthen-9-one (ITX) in milk, yoghurt and fat samples have been developed. Extraction of ITX from milk and yoghurt was performed with a mixture of cyclohexane and ethyl acetate by employment of accelerated solvent extraction (ASE).
Gertrud, Morlock, Wolfgang, Schwack
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Two new HPTLC methods for quantification of isopropyl-9H-thioxanthen-9-one (ITX) in milk, yoghurt and fat samples have been developed. Extraction of ITX from milk and yoghurt was performed with a mixture of cyclohexane and ethyl acetate by employment of accelerated solvent extraction (ASE).
Gertrud, Morlock, Wolfgang, Schwack
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HPTLC–MS Coupling: New Dimension of HPTLC
2010The direct coupling of TLC/HPTLC with mass spectrometry (MS) is of particular interest because of the later’s high sensitivity, rapid analysis, and ability to aid structural characterization. The conventional ionization method requires heating of the analyte and was suitable only for the analyses of volatile and thermally stable compounds. In contrast,
Ajai Prakash Gupta, Suphla Gupta
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Stability indicating HPTLC determination of piroxicam
Journal of Pharmaceutical and Biomedical Analysis, 2000A rapid and sensitive HPTLC method was developed and validated for the estimation of Piroxicam (PM). Spectrodensitometric scanning-integration was performed at an absorbance wavelength of 360 nm. To justify the suitability, accuracy and precision of the proposed method, recovery studies were performed at three concentration levels.
S P, Puthli, P R, Vavia
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Journal of High Resolution Chromatography, 1987
AbstractThe optimized HPTLC of ginsenosides reported in this paper shows that the recommended solvent system has a higher resolution, greater spot capacity, and better reproducibility by comparison with the established ones in the previous literature. Detection and scanning in the fluorescence mode after visualization with 5% sulfuric acid/EtOH by the ...
Xie Peishan, Yan Yuzhen
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AbstractThe optimized HPTLC of ginsenosides reported in this paper shows that the recommended solvent system has a higher resolution, greater spot capacity, and better reproducibility by comparison with the established ones in the previous literature. Detection and scanning in the fluorescence mode after visualization with 5% sulfuric acid/EtOH by the ...
Xie Peishan, Yan Yuzhen
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Journal of Liquid Chromatography & Related Technologies, 2005
Abstract Three simple, rapid, and accurate analytical methods for the determination of citalopram in tablets were developed. The high performance liquid chromatography method was carried out using Waters Nova‐Pak C18 column with a mobile phase composed of methanol–0.067 M phosphate buffer pH 2.00 (55:45, v/v), UV‐VIS detector at 239 nm, and moclobemide
Robert Skibiński, Genowefa Misztal
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Abstract Three simple, rapid, and accurate analytical methods for the determination of citalopram in tablets were developed. The high performance liquid chromatography method was carried out using Waters Nova‐Pak C18 column with a mobile phase composed of methanol–0.067 M phosphate buffer pH 2.00 (55:45, v/v), UV‐VIS detector at 239 nm, and moclobemide
Robert Skibiński, Genowefa Misztal
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HPTLC–densitometric and HPTLC–MS Methods for Analysis of Triterpenoids from Cucurbita maxima Peel
The Journal of Plant Science Research, 2023Fruits and vegetables are integral part of our day to day. They are the main source of food for the living system. Large amount of agro-waste generated from food industries and kitchen pertaining to biggest nutritional loss, environmental problems and economical implications.
Apurva P. Bhatkande +1 more
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2010
From the beginning of the 1950s, paper chromatography was used to quantify samples. The paper was made transparent by liquids and transmitted light was measured according to the Lambert-Beer law. Silver-impregnated media were used as detectors, adapted from paper photography.
Bernd Spangenberg +2 more
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From the beginning of the 1950s, paper chromatography was used to quantify samples. The paper was made transparent by liquids and transmitted light was measured according to the Lambert-Beer law. Silver-impregnated media were used as detectors, adapted from paper photography.
Bernd Spangenberg +2 more
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Quantitative HPTLC determination of selenium
Journal of High Resolution Chromatography, 1986AbstractThe present determination of selenium in biological matrices by HPTLC with in situ fluorimetric detection is an accurate alternative method, comparable to other established methods such as photometry, polarography, neutron activation, or X‐ray fluorescence analysis, gas chromatography, and atomic absorption spectrometry.The excellent ...
W. Funk +4 more
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Process Steps for HPTLC Analysis
2023This chapter briefly discusses the general aspects that can affect the result of TLC. Sample preparation, application of samples, preparation of development solvents, the steps involved in the development of TLC, visualization and derivatization, and detection of analyte are the key steps of chromatographic development.
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