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
  • Keyword register: select an initial character and browse associated keywords
  • Search by CBS edition: Select a CBS edition and find all related publications

Registered users can create a tailor made PDF of selected articles throughout CCBS search – simply use the cart icon on the right hand of each abstract to create your individual selection of abstracts. You can export your saved items to PDF by clicking the download icon.

      62 041
      Contour diagrams for the presentation of separation quality in two-dimensional thin-layer chromatography
      J.E. STEINBRUNNER, D.J. MALIK, D. NUROK*, (*Dep. Chem., Indiana Univ. - Purdue Univ. at Indianapolis, P.O. Box 647, Indianapolis, Indiana 46223, USA)

      J. High Resol. Chromatogr. 10, 560-563 (1987). Discussion of several methods for evaluating separation quality in 2-D TLC, including either the distance between spot centers for the pair of solutes that is the most difficult to separate in a mixture, or the value of a suitable separation function, as critera of overall separation quality. Selection of the optimum combination of solvent systems.

      Keywords:
      Classification: 4c
      63 017
      (A micro computer-based static radio-chromatographic detection device) (Chinese)
      Y. WANG (Wang Yuzheng), G. WU (Wu Guodong), J. LIN (Lin Jinxin), CH. QUIAN (Quian Chunliang), L. GU (Gu Lianxue), J. HUANG (Huang Jinxing), (Shanghai Inst. Nucl. Res., Acad. Sin., Shanghai, P.R. China)

      Chinese J. Nucl.Tech.(Hejishu) 10 (12), 24-28 (1987) . Description of a pneumatic position-sensitive proportional counter as a radio detector for TLC, consisting of a counter, a time-amplitude converter and a computerized data system for detection of radioactive element labeled compounds.

      Keywords:
      Classification: 3f, 4c
      64 024
      Computer simulation and optimization of preparative thin-layer chromatography under conditions of isocratic and stepwise gradient elution
      W. MARKOWSKI*, E. SOCZEWINSKI, K.L. CZAPINSKA, (*Dep. Inorg. & Anal. Chem., Med. Acad., Staszica 6, 20081 Lublin, Poland)

      Chromatographia 27, 123-127 (1989). Study of overloaded systems using an equilibrium sandwich for continuous TLC with dyes as model samples. Investigation of the effect of sample volume and the mode of development on the maximum separation yield. Calculation of the final Rf values for the front and rear edges of the bands with a computer program. Good agreement between the experimental Rf values of zone boundaries and the values predicted by computer simulation.

      Keywords: preparative TLC
      Classification: 4c
      65 006
      Testing and validation of TLC scanner
      J. ALLWOHN, S. EBEL*, (*Univ. of Würzburg, Dep. of Pharm., Am Hubland, D-8700 Würzburg, FRG)

      J. Planar Chromatogr. 2, 71-75 (1989). A validation procedure for TLC scanners is presented including determination of signal to noise ratios and instrumental sensitivity. Using test plates, the overall reliability can be determined. Validation of individual parts of the software is done by comparison of different algorithms, for example smoothing algorithms. Validation of spotting devices is shown to be possible by analysis of variances from different types of scans in order to separate errors created by positioning and measurement.

      Classification: 2a, 4c
      102 010
      Application of Scion Image software to the simultaneous determination of curcuminoids in turmeric (Curcuma longa)
      U. SOTANAPHUN*, P. PHATTANAWASIN, L. SRIPHONG (*Faculty of Pharmacy, Silpakorn University, Nakhon-pathom, Thailand, h8773con@ella.hu)

      Phytochem. Anal. 20, 19-23 (2009). TLC of curcumin (1), demethoxycurcumin (2), and bisdemethoxycurcumin (3) from the rhizomes of Curcuma longa on silica gel with hexane – chloroform – methanol 10:10:1 as mobile phase. Quantitative determination by recording the chromatogram using a digital scanner and analyzing the density of the TLC spot with the Scion Image software. The hRf values of (1), (2), and (3) were 42, 25, and 18, respectively. Selectivity regarding matrix was given. Linearity was between 0.375 and 6 µg/spot for all curcuminoids. The intermediate precision of the method was satisfactory. Recovery was 101.9 % for (1), 104.8 % for (2), and 101.5 % for (3). The limits of detection and quantification were 43 and 143 ng/spot for (1), 69 and 230 ng/spot for (2), and 73 and 242 ng/spot for (3). The method was compared with an official densitometric method, and the analytical results were not significantly different.

      Classification: 4c, 30b
      65 045
      Computer averaging of TLC raw data
      R.E. KAISER*, M. PROSEK, (*Inst. for Chromatography, P.O.Box 1141, D-6702 Bad Dürkheim)

      J. Planar Chromatogr. 2, 138-141 (1989). To overcome structure signals of the HPTLC-plates the concept of multiple scanning at changed angles of a planar chromatogram rotated stepwise was used. The procedure does not falsify raw data and has nothing to do with any kind of smoothing. The authors work with the mean values but do not touch the original raw data.

      Classification: 2c, 3d, 4c
      104 013
      A comparative study on several algorithms for denoising of thin-layer densitograms
      L. KOMSTA (Department of Medicinal Chemistry, Medical University of Lublin, Jaczewskiego 4, 20-090 Lublin, Poland)

      Anal. Chim. Acta 641 (1-2), 52-58 (2009). Comparison of classical filtering techniques (Savitzky–Golay, Adaptive Degree Polynomial Filter, Fourier denoising, Butterworth and Chebyshev IIR filters) and wavelet shrinkage (31 mother wavelets, 3 thresholding techniques and 11 decomposition levels) with the original noisy signal and a reference signal which was denoised experimentally by averaging 64 measurements. The best similarity to the reference signal was obtained with filters, however the signal was slightly oversmoothed. The wavelet shrinkage method gave less denoised signals. There was a significant influence of the thresholding technique and decomposition level, and best conditions were at level 2 or 3 and soft thresholding), whereas changing of the mother wavelet almost did not change the result. The presented results can be used as general recommendations for denoising densitometric fingerprints before applying further chemometric algorithms. The best choices were: Savitzky–Golay filter of appropriate window width (optimized against autocorrelation) or wavelet shrinkage with Haar wavelet, soft thresholding and high decomposition level.

      Classification: 4c
      65 049
      Quantitative thin layer chromatography
      M. PROSEK, M. PUKL, (Kemijski Institut „BORIS KIDRIC“, Hajdrihova 19, 61115 Ljubljana, Yugoslavia)

      8. Integration problems in QTLC. J. Planar Chromatogr. 2, 128-132 (1989). Some integration problems in quantitative TLC are illustrated. A prepared program simulates chromatograms with different position, concentrations, and shapes of chromatographic peaks. The results of integration are presented and discussed. In TLC it is necessary to find the correct peak start. Evaluation of a small peak after a big one can be done more precisely than the evaluation of a small one in front of a large one.

      Classification: 4c