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:
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J. Chem. Pharm. Res. 2(1), 155-161 (2010). A chroman derivative (C16O4H22) was isolated from the ethanolic extract of dried seeds of Ensete superbum. HPTLC on silica gel with toluene – ethyl acetate – formic acid 5:4:1. Quantitative determination by absorbance measurement at 254 nm. The linear range was 300-900 ng/band. The amount of the chroman in different fractions of the extract was 1.83 % (ethanol fraction), 1.74 % (ethyl acetate fraction) and 0.74 % (methanol fraction).
J. of Chromatogr. A 1218 (19), 2820-2825 (2011). A unified procedure for image preprocessing of 2D TLC videoscans saved as JPG files is proposed for further supervised or unsupervised chemometric analysis. The procedure was based on open source software and included denoising using a median filter, baseline removal with the rollerball algorithm and nonlinear warping using spline functions. The application of the proposed procedure enabled filtration of random differences between images, such as changes in the intensity of the background as well as differences in the location of the zones. After the preprocessing only the zone intensity had an influence on the statistical analysis by principal component analysis (PCA) or other techniques. The proposed technique was successfully applied for the determination of the differences between three Carex species based on the 2D videoscans of the extracts.
J. Planar Chromatogr. 23, 323-325 (2010). HPTLC of taraxerol on silica gel with hexane - ethyl acetate 9:1 in a saturated twin-trough chamber. Detection by spraying with anisaldehyde - sulfuric acid reagent followed by heating for 5 min at 80 °C. Quantitative determination by absorbance measurement at 540 nm. The average recovery was between 99.6 and 100.3 % with %RSD less than 2 %. For both intra-day and inter-day precision %RSD was less than 2 %. The LOD and LOQ were 47 and 140 ng/band, respectively. The linearity range was 0.5-2.5 µg/band. The hRf value of taraxerol was 22.
J. Planar Chromatogr. 24, 376-380 (2011). HPTLC of stem bark extracts from D. melanoxylon and lupeol and betulin on silica gel, prewashed with methanol, with ethyl acetate - hexane 9:41 with chamber saturation for 3 min at 29 +/- 4 °C and 65 +/- 5 % relative humidity. The hRf value was 46 and 25 for lupeol and betulin, respectively. Quantitative determination by densitometry in absorption mode at 560 nm for lupeol and 510 nm for betulin. Detection by derivatization with 5 % methanol-sulfuric acid reagent. The LOD and LOQ was 40 and 100 ng/zone for lupeol and 50 and 100 ng/zone for betulin, respectively. The instrument precision and repeatability (n = 6) were 0.8 and 1.3 % for lupeol and 1.1 and 1.2 % for betulin, respectively. The linearity range was 100-500 ng/zone for both lupeol and betulin. The intra-day and inter-day precision was 1.1-1.7 % and 1.3-2.0 % for lupeol and 0.8-1.9 % and 1.9-2.2 % for betulin.
J. Liq. Chromatogr. Relat. Technol. 32, 2893-2905 (2009). HPTLC of albiflorin, paeoniflorin, (beta)-catechin, benzoyloxypaeoniflorin, benzoylpaeoniflorin, beta-sitosterol in the roots of Radix paeoniae Rubra (1) and Radix Paeoniae Alba (2) on silica gel with chloroform - ethyl acetate - methanol - formic acid 30:5:10:1 for high polarity components and toluene - ethyl acetate - methanol - formic acid 20:4:2:1 for lipophilic components. Detection by spraying with vanillin - sulphuric acid - ethanol 1:5:95, followed by heating at 105 ºC for 10 min. Qualitative determination by densitometry at 366 nm. The HPTLC fingerprints allowed differentiation between the roots of (1) and (2).
J. Planar Chromatogr. 23, 365-368 (2010). HPTLC of palmitoyl hexapeptide (an antiwrinkle peptide) on silica gel with toluene - ethanol 9:1 in a twin-trough chamber with saturation for 30 min at room temperature (25 +/- 2 °C). The hRf was 33. Quantitative determination by absorbance measurement at 211 nm. Linearity was between 10 and 30 ng/band. The LOD and LOQ was 3 and 9 ng/band, respectively. The intra-day precision (%RSD, n = 6) was 0.9-1.5 % and the inter-day precision 0.9-1.4 %. The small %RSD obtained after small changes of the method conditions indicate the method is robust. The recovery of the method was in the range of 98.9-101.3 %.
f. ) Etting, (Loranthaceae), growing on different substrates. J. Planar Chromatogr. 24, 60-65 (2011). HPTLC of phenolic compounds with caffeic acid, (+)-epicatechin, ellagic acid, gallic acid, and kaempferol as markers on silica gel with toluene - ethyl acetate - methanol - formic acid 14:6:1:1 in a twin-trough chamber with saturation for 30 min at 24 °C. Quantitative determination by absorbance measurement at 300 nm. Detection by dipping in anisaldehyde-sulfuric acid reagent followed by heating at 110 °C for 5 min. Evaluation under UV 254 nm and visible light after derivatization. Repeatability (n = 7) was between 0.5-2.4 %; intermediate precision was between 1.5-4.4 %. For (+)-epicatechin, ellagic acid, gallic acid, caffeic acid, and kaempferol, LOD was 332, 225, 21, 64, and 35 ng/zone, LOQ was 1157, 740, 67, 242, and 115 ng/zone, and precision (%RSD) was 3.8, 4.9, 4.7, 5.4, 1.7 %, respectively. The hRf value was 39 for (+)-epicatechin, 43 for ellagic acid, 55 for gallic acid, 65 for caffeic acid, and 72 for kaempferol.
J. of China Three Gorges Univ. Natural Sciences 33 (4), 92-95 (2011). TLC of extracts of Biyuan Pills on silica gel 1) for Magnolia liliiflora Desr. with dichloromethane - ethyl acetate 9:1, detection by spraying with 10 % sulfuric acid in ethanol and heating at 90 °C until the zones were detected; 2) for Xanthium sibiricum Patr., with chloroform - ethyl acetate - methanol - water - formic acid 3:10:2:2:2, detection by exposure to iodine vapor until the zones were detected; 3) for Lonicera japonica and Chrysanthemum indici flos, with toluene - ethyl acetate - formic acid - glacial acetic acid - water 1:15:1:1:2, detection under UV 365 nm.