Two different types of HPLC column have been used to determine the mycotoxin ochratoxin A in red and white wines by liquid chromatography-tandem mass spect... P Z?Llner,A Leitner,D Lubda,... - 《Chromatographia》 被引量: 103发表: 2000年 Improved acetone-butanol fermentation analysis using ...
That’s their sole purpose, and high-performance filters are designed to withstand the pressures in an HPLC system, despite having very small pore sizes. They can considerably lengthen the lifetime of the column. Guard columns can perform a similar function but are considerably more expensive to...
HPLC (High Performance Liquid Chromatography) and LCMS (Liquid Chromatography-Mass Spectrometry) are analytical techniques used to separate, identify, and quantify compounds within a mixture. HPLC focuses on the separation of compounds based on their interaction with the column's stationary phase and th...
5-HT and NE are high polar analytes, which were difficult to be retained in the column. The progress of Conclusions In this paper, HPLC/MS/MS method was developed for the simultaneous determination of two types of neurotransmitters, which closely relate to myocardial ischemia. The results indica...
(LC/MS and LC/MS/MS) and is routinely used for quantitative analysis in biological samples such as blood, urine and other body fluids. HPLC consists of using a liquid mobile phase to pass under high pressure a mixture of analytes extracted from the sample through a column containing the ...
40、re “trapped” temporarily in the pores, while larger molecules are not held up and pass through the column relatively unhindered The extent of retardation of the molecules is a function of their molecular size, and as such this type of chromatography has found a use in purifying biomolecul...
Relegationchromatographyis a preliminary fashion in which a sample is placed onto the head of the column and is also displaced by a solute that's further explosively adsorbed than the factors of the original admixture. As a result, the factors are resolved into successive blockish zones of large...
and larger 3.5/5 μm HPLC columns Designed to withstand higher pressures of 9,000 psi (4.6 mm ID) and 18,000 psi (2.1 and 3.0 mm ID) Select column length (30, 50, 75, 100, and 150 mm) for the correct balance between resolution and throughput High T hroughput....
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It has been found that there are many flavonoids, lignans, iridoids and phenylethanols, but the studies on chemical constituents of O. fragrans roots are still limited. Column chromatography is a usual technique for isolation and purification, but it is difficult for the separation of those only...