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
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      71 024
      Quantitative thin layer chromatography
      I. DRUSANY, M. PROSEK*, (*Boris Kidric Inst. of Chem., Hajdrihova 19, Ljubljana, Slovenija)

      10: Effect on reproducibility of the relative positions of the spots and scanning slit. J. Planar Chromatogr. 5, 164-168 (1992). Demonstration that the most significant contribution to statistical errors in TLC arises from errors in positioning as a result of unequal and inhomogeneous distribution of samples on the stationary phase, and irregular relative positioning of slit and spot during a scan.

      Classification: 3f
      77 030
      Quantitative thin-layer chromatography
      M. PROSEK*, A. GOLC-WONDRA, A. SMIDOVNIK, (Lab. for Food Chem., Nat. Inst. of Chem., P.O. Box 30, 61115 Ljubljana, Slovenia)

      Part XIII - Identification of residues on the surface of diffusely reflecting layers. J. Planar Chromatogr. 9, 178-180 (1996). Description of a method for quantitative evaluation, by densitometry, of unidentified contaminating residues present as small spots on the surfaces of tablets, surfaces which act as diffusely reflecting layers. - Semiquantitative results are obtained by comparison of peak areas from the tablets with calibration curves from samples applied to a dry TLC plate. The limit of detection is from 1 to 5 ng per spot, depending on the substance measured.

      Classification: 3f
      86 014
      Evaluation in HPTLC by use of imaging systems
      S. EBEL*, T. HENKEL, (*Dept. of Pharm., Univ. of W¸rzburg, W¸rzburg, Germany)

      1. Basic algorithms of image processing. J. Planar Chromatogr. 13, 248-253 (2000). Description of the basic principles of image processing in HPTLC and TLC including the definitions of scanning densitometry and two-dimensional digitized chromatograms in terms of vector or matrix algebra. The basics of imaging processes concern pixels, color systems, and imaging operations and image processing using image-manipulation procedures such as changing the mode from color to gray-values, presenting gray-values as histograms, including equalization or contrast stretching, and two-dimensional deconvolution procedures. Further operations are also needed; the necessary algorithms and/or the principles are given in the paper.

      Keywords:
      Classification: 3f
      92 024
      Fluorescence enhancement of pyrene measured by thin-layer chromatography with diode-array detection
      B. SPANGENBERG*, K. LORENZ, S. NASTERLACK, (*Univ. of Appl. Sci. Offenburg, Badstrasse 24, DE-77652 Offenburg, Germany)

      J. Planar Chromatogr. 16, 331-337 (2003). Literature recommends dipping TLC plates in viscous liquids to enhance fluorescence. Measurement of the fluorescence and absorbance spectra of pyrene spots reveals the mechanism of enhancement of plate dipping in viscous liquids - blocked contact of the fluorescent molecules with the stationary phase or other sample molecules is responsible for the enhanced fluorescence at lower concentrations. TLC and HPTLC of pyrene on silica gel and on RP-18 with methanol - acetone 8:3. The dipping solution was prepared by dissolving 3.8 g pentane sulfonic acid in 20 mL water. Densitometry in the range of 198 to 610 nm.

      Keywords:
      Classification: 3f, 5b
      110 016
      Validation of a densitometric method for the determination of theanine in tea extracts using CP atlas software
      D. CSUPOR*, K. BOROS, A. HUNYADI, K. VERES, J. HOHMANN (*University of Szeged, Faculty of Pharmacy, Department of Pharmacognosy, Eötvös u. 6, Szeged, Hungary, csupor.dezso@pharmacognosy.hu)

      J. Planar Chromatogr. 25, 571-574 (2012). HPTLC of theanine in tea extracts on silica gel with n-butanol - acetone - acetic acid - water 7:7:2:4. Detection by dipping into a ninhydrin reagent for 3 s, followed by heating at 105 °C for 5-15 min. Quantitative determination by analysis of green channels of photographs using the CP Atlas 2.0 software. The hRf of theanine was 35. Linearity was in the range of 1.4-14 ng/zone. The intermediate/inter-day/intra-day precision was below 0.7 % (n=3). Recovery (by standard addition) was between 95.7 and 102.5 %.

      Classification: 3f, 18
      56 021
      Effect of laser beam shape parameters on photothermal deflection densitometers
      T. CHEN, M. MORRIS

      Anal. Chem. 56, 1674-1677 (1984). Investigation of the possibilities of laser beam densitometry for thin-layer chromatograms. Picogram sensitivity appears obtainable with 15 mW power level (argon 488/514 nm or helium cadmium 442 nm laser).

      Keywords:
      Classification: 3f
      60 029
      Dünnschicht-Chromatographie unter hohem Druck - HPTLCc (High pressure circular TLC - HPTLCc, Part I)
      R.E. KAISER, R.I. RIEDER, (Inst. f. Chromatogr., Postfach 1141, D-67085 Bad Duerkheim)

      GIT Suppl. Chromatogr. 3, 32-38 (1986); part II: GIT Fachz. Lab. 10, 993-998, (1986). Principle and applicability of TLC using mobile phase pressure of up to 80 bars. Circular development of single sample injected in-flow and of multi samples applied on the dry layer. Use of normal and reversed phase material, including multiple use of the same layer. Quantification of the chromatograms by direct image processing using optical sensitive RAM.

      Keywords:
      Classification: 3c, 3d, 3f
      64 016
      Indirect fluorimetric detection of non-electrolytes in thin-layer chromatography
      Y. MA, E.S. YEUNG* (*Ames Lab. - USDOE and Dep.Chem., Iowa State Univ., Ames, IA 50011, USA)

      J. Chromatogr. 455, 382-390 (1988). Presentation of an indirect fluorimetric detection method for alkanols, bile acids and digoxin series for TLC on silica or chemically bonded silica with different solvent systems containing certain fluorophores, which generates uniform background fluorescence, and allowing detection of non-fluorescent spots with nanomolar detection limits. Discussion of the selection of visualization reagent and the effect of the chromatographic conditions.

      Keywords: densitometry
      Classification: 3f