Influence of gases on the HPTLC determination of some fluorescent fluorobenzoxadiazole‐thiol derivatives

Abstract

Short Communicationsliog and liln are the complementary indces both of which are fractions between 0 and 1.Example 2: With reference to example 1 it is desired to find the logarithmic and linear retention indices of a compound having an uncorrected retention volume v;=108 ml, knowing that a = 2, x = 5 ml, and 4 2 = 37 ml Solution vy= 108 -5 = 103 ml, vlz =37-5 = 32 ml Substituting in Eq. (22) [3] A.

Effect of non-ionic surfactants as mobile phase additives on the fluorescence intensity of dansyl derivatives of biogenic amines in high-performance thin-layer chromatography

“…Environmental changes to fluorescent compounds adsorbed on solid surfaces may strongly affect the fluorescence quantum yield. [23][24][25] The addition of organized media (e.g., surfactants, cyclodextrins) may also involve changes in the molecular environment of compounds adsorbed on a solid surface, so post-chromatographic treatment of the plate with surfactants has been proposed with the object of increasing the intensity of the fluorescence emitted by the analytes, 26,27 although this may cause some problems with the homogeneity of the substrate. However, we do not know of any work on fluorescence enhancement generated by surfactants as mobile phase additives in TLC.…”