The radial paper Chromatography of some metals: Zn, Cd, Hg; Li, Na, K, Cs; Be, Mg, Ca, Sr, Ba, carried out using as mobile phase the upper layer of n-butanol-water-nitric acid mixtures of increasing acidity, shows that, 1. the phenomenon of the deepening of the colour towards ...
What is RF Value? Calculation of RF Value Why Do We Need the RF Value? Factors Affecting Rf Values Further Insights on RF Value FAQs Related to RF valueWhat is RF Value?The Rf value (retardation factor/Retention Factor) is an important parameter in chromatography that represents the distance...
It is the distance travelled by the sample or analyte divided by distance travelled by the solvent front in chromatography.试样经层析后可用比移值（Rf）表示各组成成分的位置（比移值=原点中心至色谱斑点中心的距离与原点中心至流动相前沿的距离之比），由于影响比移值的因素较多，因此一般采用在...
Rf values in chromatography are the basic requirement of the whole experiment. These values tell us whether the analyte (solute) is more affinitive with stationary or the mobile phase. Rf values evaluate the polarity, relative masses, and relative solubilities with stationary and mobile phases, etc...
The RF(retardation/retention factor) values can be calculated using the above approach and experiment. A prepared sample solution (A+B) is applied to the chromatography paper and processed through a mobile phase. Analytes (A) and (B) separate due to their different affinities with the mobile ...
The adsorption behaviour of 47 metal ions has been studied in aqueous HCl systems using stannic ersenate layers. The effect of solvent pH on Rf alongwith the complexation effect of HCl has been investigated. On the basis of Rf values the KSP of some metel arsenates have been predicted. ...
After examining the results of the chromatography performed in step 2, measure the distance that the test substance traveled before dropping out of the solution (Ds) and then the distance that the solvent traveled(Df). The retardation factor, Rf, is then given by the expression Ds/Df. Interpr...
It is the distance travelled by the sample or analyte divided by distance travelled by the solvent front in chromatography.试样经层析后可用比移值(Rf)表示各组成成分的位置(比移值=原点中心至色谱斑点中心的距离与原点中心至流动相前沿的距离之比),由于影响比移值的因素较多,因此一般采用在相同实验条件下...
Switch to Mobile Site Recommended articles No articles found. Citing articles (0) This article has not been cited. Related book content No articles found.doi:10.1016/S0378-4347(00)83155-2KarelMacekSDOSJournal of Chromatography B Biomedical Sciences & Applications...
Use of multiple Rf values for identification by paper and thin-layer chromatography Maximum information from chromatography for qualitative analysis is obtained when the RfX value for a compound in system X is independent of its value Rfy in another system Y. It is found, for such systems, that...