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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      115 003
      An interphase model for retention in liquid chromatography
      C. F. POOLE (Department of Chemistry, Wayne State University, Detroit, MI 48202, USA, cfp@chem.wayne.edu)

      J. Planar Chromatogr. 28, 98-105 (2015). An interphase is a diffuse thick region separating two dissimilar phases in which one phase usually has a limited solubility in a region of the other. The interphase model redefines the stationary phase in biphasic separation systems to include components absorbed from the mobile phase by selective solvation. The interphase model in reversed-phase liquid chromatography shows that retention properties can be adequately described by the solvation parameter model and visualized as a function of the bulk mobile phase composition. For normal phase a competition model approach is required to separate between the contributions of solvent and solute interactions with the adsorbent surface, and the solvation parameter model to provide insight into the relative importance of various intermolecular interactions on retention and selectivity.

      Keywords: review
      Classification: 2b
      68 003
      A new approach to optimization in TLC
      B. BELENKII*, O. KURENBIN, L. LITVINOVA, E. GANKINA, (*Inst. for Anal. Instrum. of the Acad. of Sci. of the USSR, pr. Ogorodnikova 26, 1981103 Leningrad, USSR)

      J. Planar Chromatogr. 3, 340-347 (1990). Determination of the dependence of reduced HETP (H) on reduced rate (u) in TLC at the end of chromatography as well as the contribution of mass transfer, rate profile, and molecular diffusion to this dependence. It was shown that in the range of u = uopt this dependence is weak. A new approach to the optimization of TLC is proposed. It is based on using plates of length L = Lopt and u = 0.4, which is slightly lower than u = uopt. The condition h = hopt is fulfilled over the entire length of the plate

      Keywords:
      Classification: 2b
      72 013
      A coadsorption effect in a liquid - solid TLC system of the type silica - heptane + dioxane in a horizontal DS chamber
      T.H. Dzido, B. Polak (Department of Inorganic and Analytical Chemistry, Medical Academy, Staszica 6, 20081 Lublin, Poland)

      J. Planar Chromatogr. 6, 378-381 (1993). Comparison of the retention of phenols and quinolines in TLC systems consisting of silica and a binary eluent (dioxane + heptane or ethyl acetate + heptane) using a horizontal DS chamber. The modification of retention (by saturation with eluent vapor) caused changes in the retention which can be attributed to eluent concentration gradients.

      Keywords:
      Classification: 2b
      97 005
      Retention process in normal-phase TLC system
      W. Zapala*, M. Waksmundzka-Hajnos (*Department of Chemical Engineering and Process Control, Chemical Faculty, Rzeszów University of Technology, Al. Powstanców Warszawy 6, 35-959, Rzeszów, Poland, ichwz@prz.rzeszow.pl)

      J. Liq. Chrom. & Rel. Technol. 27, 2127-2141 (2004). Study of the influence of mobile phase composition on the retention of selected test analytes in different normal-phase TLC systems and proposition of a new model for an accurate prediction of the analyte retention in the TLC with binary mobile phase. HPTLC of 15 analytes (phenol, 2-nitroaniline, 4-nitrophenol, quinoline, 4-aminophenol, hydroquinone, 1,2-phenylenediamine, 2-hydroxyquinoline, 4-nitroaniline, 2-iodoaniline, 8-methylquinoline, aniline,1-aminonaphthalene, 4-iodoaniline, 1,5-diaminonaphthalene) on cyano, diol and amino phase in horizontal chambers with binary mixtures of polar modifiers (2-propanol, ethyl acetate, ethyl methyl ketone, dioxane, or tetrahydrofuran with n-heptane). Detection under UV light at 254 nm.

      Keywords: HPTLC
      Classification: 2b
      108 006
      Quantitative structure–retention relationship of new N-substituted 2-alkylidene-4-oxothiazolidines
      D. DABIC, Maja NATIC*, Z. DZAMBASKI, R. MARKOVIC, D. MILOJKOVIC, O. TESIC (*Faculty of Chemistry, University of Belgrade, P. O. Box 51, 11158 Belgrade, Serbia, mmandic@chem.bg.ac.rs)

      J. Sep. Sci. 34, 2397-2404 (2011). HPTLC of 23 newly synthesized N-substituted 2-alkylidene-4-oxothiazolidines on RP-18 with 1) methanol - water, 2) acetonitrile - water, and 3) tetrahydrofurane - water. A quantitative structure-retention relationship study allowed to understand the chromatographic behavior of similar compounds.

      Classification: 2c
      114 002
      (Topological models of the retention index for chiral organic acids) (Chinese)
      M. LI (Li Mingjian), Y. WANG (Wang Yuxiao), H. FENG (Feng Hui), CH. FENG (Feng Changjun)* (*Sch. Of Chem. & Chem. Eng., Xuzhou Inst. of Technol., Jiangsu, Xuzhou 221111, China)

      Chinese J. Chromatogr. 32 (3), 242-247 (2014). Definition of novel molecular connectivity indices and calculation of the indices for 18 chiral hydroxyl acids and amino acids, based on Kier’s molecular connectivity indices and conjugated matrix. Study of the quantitative structure-retention index relationship (QSRR) between the retention index of the chiral organic acids and the chiral connectivity indices by multivariate statistical regression. The best four-parameter QSRR model was set up through leaps-and-bounds regression analysis. The traditional correlation coefficient and the cross-validation correlation coefficient of leave-one-out were given, respectively. The results demonstrated that the model was highly reliable and had good predictive ability from the statistical point of view. From the parameters of the model, it is known that the dominant influence factors on the retention index were the two-dimensional molecular structure characteristics and the space factors such as the chiral characteristics, the flexibility and the puckered degree of the molecules of the chiral organic acids. The results also indicated that the introduced chiral connectivity indices had good rationality and validity for the characterization of the retention indices for the chiral organic acids, thus, provided an effective method for predicting the retention indices of chiral organic acids.

      Keywords:
      Classification: 2c, 11a, 18a, 38
      117 020
      High-performance thin-layer chromatography and pressurized planar electrochromatography of some diastereomeric amino acid derivatives in reversed-phase system with carboxylic acid mobile phase buffers
      B. POLAK*, A. MARUSZAK, P. PLOCHARZ (*Department of Physical Chemistry, Medical University of Lublin, Chod?ki 4A, 20-093 Lublin, Poland, beata.polak@umlub.pl)

      J. Planar Chromatogr. 29, 22-29 (2016). HPTLC of 1-fluoro-2,4-dinitrophenyl-5-l-valine amide diastereomeric derivatives of aspartic acid, cysteine, and histidine on RP-18W with 40–80 % of acetonitrile in water, in 10 % steps. The retention analysis showed that retention of solutes diminished when the mobile phase became less polar.

      Classification: 2c
      121 016
      Application of thin-layer chromatography to the lipophilicity analysis of selected anticancer quinobenzothiazine derivatives
      A. ZIEBA, K. BOBER* (*Department of Organic Chemistry, School of Pharmacy and the Division of Laboratory Medicine, Medical University of Silesia in Katowice, Jagiello?ska
      4, 41-200 Sosnowiec, Poland, bober@sum.edu.pl)

      J. Planar Chromatogr. 31, 105-111 (2018). HPTLC of 13 quinobenzothiazine derivatives on RP-18 with acetone as organic modifier and aqueous TRIS buffer with pH 7.4 and ionic strength of 0.2 M. The contents of the organic modifier in the mobile phase ranged from 40 to 80% in 5 % increments. Lipophilicity parameters were determined for the analysis of structure–activity relationship (QSAR).

      Classification: 2c