Cumulative CAMAG Bibliography Service CCBS
Our CCBS database includes more than 11,000 abstracts of publications. Perform your own detailed search of TLC/HPTLC literature and find relevant information.
The Cumulative CAMAG Bibliography Service CCBS contains all abstracts of CBS issues beginning with CBS 51. The database is updated after the publication of every other CBS edition. Currently the Cumulative CAMAG Bibliography Service includes more than 11'000 abstracts of publications between 1983 and today. With the online version you can perform your own detailed TLC/HPTLC literature search:
- Full text search: Enter a keyword, e.g. an author's name, a substance, a technique, a reagent or a term and see all related publications
- Browse and search by CBS classification: Select one of the 38 CBS classification categories where you want to search by a keyword
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- Search by CBS edition: Select a CBS edition and find all related publications
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J. Planar Chromatogr. 28, 426-435 (2015). HPTLC of methyl 4-hydroxybenzoate, ethyl 4-hydroxybenzoate, propyl 4-hydroxybenzoate and butyl 4-hydroxybenzoate on silica gel with petroleum ether - acetic acid 20:3. Quantitative determination by absorbance measurement at 254 nm. The influence of experimental settings on densitometric evaluation using the TLC Scanner 4 was investigated to assess the impact on signal intensities, peak shape/resolution and quantitative results. Peak positions can shift for up to 0.5 mm for fast scan speeds. For improved quantitative results the scan slit length should be set to 75 % of the band length, the scan speed to 5 or 10 mm/s and data resolution to 25 or 50 μm/step. The resolution mode of the optical system provided higher signal intensities compared to the light mode. Peak broadening was observed for higher scan speeds, whereby the signal height decreased significantly, if compared to the peak area evaluations. The effects of the instrumental settings on the signal intensity were less pronounced for the evaluations via peak area. Hence, peak area evaluations were more robust with regard to the changed settings.
Proc. 9th Internat. Symp. Instr. Chromatogr., Interlaken, April 9.-11., 365-372 (1997). Presentation of the validation of a HPTLC procedure for quantification of caffeine with a Video Documentation System. Validation was performed according to the ICH guidelines, considering the special features of the method. The validation parameters were: selectivity, stability of the analyte, linearity, precision (repeatability and intermediate precision) and robustness. The obtained results were compared with those obtained by the slit-scanning densitometer. HPTLC of caffeine on silica with dichloromethane - methanol 9:1. Evaluation by densitometry at 270 nm. Repeatability 1.59% (densitometer) and 1.21% (CCD camera); intermediate precision 1.22% (densitometer) and 1.12% (CCD camera); robustness 1.47% (densitometer) and 1.37% (CCD camera).
Acta Chromatographica 22 (3), 391-404 (2010). Examination of the effect of conditioning of the silica layer by mobile phase vapor, diethylamine vapor and its aqueous and methanolic solutions, and ammonia vapor on the retention of alkaloids eluted with multicomponent non-aqueous mobile phases. Investigation of the effect of conditioning time and vapor phase composition on system efficiency and peak symmetry, and as well the effect of vapor phase composition on separation selectivity.
Journal of High Resolution Chromatography 6, 82-88 (1983). TLC of desipramine, codeine, cocaine, butacaine, flurazepam, caffeine, nikethamide, benzocaine on silica with methanol. Detection by UV 254 or with acidified iodoplatinate reagent.
J.Liquid Chromatogr. 6, 63-71 (1983) Investigation of the adsorption behaviour of solvents whose molecules differ in polarity functional groups and shape and the effect of the less polar diluent. Determination of the surface excess for various combinations of diluents and polar solvents using the modified thin-layer frontal chromatography technique.
J. High Resol. Chromatogr. 10, 362-364 (1987). Application of the top triangle of the „prisma“ model for mobile phase optimization of polar compounds in normal phase chromatography. TLC and HPTLC of ginsenosides on silica with water - methanol - MEK in various proportions. OPLC of the separated ginsenosides on silica with MEK - methanol - water 70:22:8. Detection by spraying with vanillin - sulfuric acid and densitometry at 550 nm.
J. Planar Chromatogr. 5, 80-86 (1992). Forced-flow planar chromatographic (FFPC) techniques such as over-pressured layer chromatography (OPLC) and rotation planar chromatography (RPC) have been used to study the influence of the forced eluent flow on the dimensions of the spot. The correlation between the eluent flow and the transverse spot dimension on TLC and HPTLC layers has demonstrated that diffusion can be dramatically reduced up to certain eluent flow; at higher eluent flows diffusion remains constant or increases only slightly.
Proc. Intern. Symp. on Planar Separations, Planar Chromatography 2001, pp. 137-148. Presentation of the main steps for a systematic optimization of a planar chromatographic method according to the 'PRISMA' system: The first stage is the selection of the stationary phase, the vapor phase, and suitable solvents which can occasionally immediately result in a suitable separation. For most real separation problems the second stage, optimization of the mobile phase, is also necessary. The third part of method development is the selection of the final conditions, e.g. the mode of development, transfer of the mobile phase to an appropriate forced-flow method, and the selection of suitable operating parameters.