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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      94 004
      Densitometric comparison of the performance of Stahl-type and sandwich-type planar chromatographic chambers
      M. SAJEWICZ, A. PIENIAK, R. PIETKA, K. KACZMARSKI, T. KOWALSKA* (*Institute of Chemistry, Silesian University, 9 Szkolna Street, 40-006 Katowice, Poland)

      J. Liq. Chrom. Rel. Technol. 27, 2019-2030 (2004). Comparison of the N-type and S-type chambers in terms of mobile phase flow rate, the Rf values obtained, and the densitometrically established concentration profiles of the test analytes. Selected were several phenyl-substituted alcohols and acids, low activity adsorbents (e. g. cellulose powder), and low-polarity solvents (n-octane and decalin) as the components of the chromatographic systems investigated. The overall conclusion from the results obtained is that the physico-chemical performance of the S-chamber is comparable with that of the N-chamber, and that the only indisputable superiority of the S-chamber is the more economical use of the mobile phase.

      Keywords: densitometry
      Classification: 2d, 2a
      104 005
      Determination of the lipophilicity of selected isoquinoline alkaloids by RP-TLC
      M. WAKSMUNDZKA-HAJNOS, D. MATOSIUK, A. PETRUCZYNIK, U. KIJKOWSKA-MURAK* (*Medical University of Lublin Department of Inorganic Chemistry 20-081 Lublin Poland)

      Acta Chromatographica 24 (4), 563-573 (2008). TLC of nine alkaloids on RP-18 with mixtures of aqueous acetone or aqueous dioxane with various mobile phase additives (ammonia, diethylamine, or tetrabutylammonium chloride) in order to suppress ionization of the alkaloids and/or reduce ionic interactions with surface silanol groups. Ion-pair TLC on RP-18 with aqueous acetone mixtures and various mobile phase additives (pentane sulfonic acid, octane sulfonic acid, or di-(2-ethylhexyl)orthophosphoric acid). Investigation of relationships between RM values and modifier concentration using a linear semilogarithmic equation for experimental data to calculate lipophilicity values RMW (RM for pure water), the slope, and the intercept with the x -axis. Comparison with retention data of standards with known lipophilicity (log P).

      Keywords: doping
      Classification: 2d, 22
      122 015
      Influence of organic modifier and separation modes for lipophilicity assessment of drugs using thin layer chromatography indices
      N. M. BHATT, V. D. CHAVADA, M. SANYAL, P. S. SHRIVASTAV* (*Dep. of Chem., School of Sci., Gujarat Univ., Ahmedabad, 380009, Gujarat, India, pranav_shrivastav@yahoo.com)

      J. Chromatogr. A 1571, 223-230 (2018). Evaluation of lipophilicity of 11 representative drugs, including six proton pump inhibitors (omeprazole, pantoprazole, rabeprazole, lansoprazole, ilaprazole, and tenatoprazole), an anti-vertigo drug, betahistine, nonsteroidal anti-inflammatory drug, ibuprofen, anti-malarial drug, atovaquone, an anti-HIV agent, atazanavir and a hormonal drug, calcitriol, by employing NP and RP separation modes. Investigation of the effect of different organic modifiers for the estimation of lipophilicity. Estimation of the quantitative descriptor of lipophilicity, the partition coefficient (logP) by suitably optimizing the solvent systems for normal and reversed phase TLC. The best mobile phase pairs were toluene – acetonitrile and water – methanol, respectively. Analysis of the dominant pattern in the data by using principal component analysis, hierarchical cluster analysis, as well as non-parametric methods like sum of ranking differences and generalized pair wise correlation. The results obtained from both separation modes were comparable and in good agreement with the computational data for all the drugs.

      Classification: 2d, 32c
      66 006
      General approach to the Rf adjustment in TLC
      S.L. BOLOTOV, (Anti-Doping Centre, Institute of Sports, Elisavetinsky st. 10, 107005 Moscow, USSR)

      Kontakte (Darmstadt) 36-39 (1990). Explanation of physical aspects of TLC with reasonable approximations. Discussion of differences between observed and true retention values. Proposal of a general approach for the estimation of correction coefficients (including some real examples). Explanation of physical aspects of TLC with reasonable approximations.

      Keywords:
      Classification: 2d
      70 012
      An equation expression the effect of sorbent characteristics on eluent flow velocity in thin layer chromatography
      L.S. LITVINOVA*, O.I. KURENBIN, (*Inst. of Macromol. Cpds., USSR Acad. of Sci., Bolshoy pr. 31, 199004 Leningrad, USSR)

      J. Planar Chrom. 4, 402-405 (1991). Study of the dependence of the eluent front migration velocity in TLC on the pore volume and particle size distribution of the sorbent. Proposition and experimental confirmation of an equation which relates the velocity to the parameters of the chromatographic system.

      Keywords:
      Classification: 2d
      74 010
      Determination of the hydrophobicity parameter RMW by reversed-phase thin-layer chromatography
      K. DROSS, CH. SONNTAG, R. MANNHOLD*, (*Dept. Laser-Med., Mol. Drug Res. Group, Heinrich-Heine-Univ., Universitätsstr. 1, 40275 Düsseldorf, Germany)

      J. Chromatogr. 673, 113-124 (1994). TLC determination of lipophilicity parameters on the basis of thermodynamically true RM values. Discussion of the superiority of methanol as compared with other modifiers and its physico-chemical behavior. Influence of the solvent pH on the silanophilic effect. Extrapolation to modifier-free condition (RMW value) to diminish the contribution of polar interactions. Comparison of the advantages and disadvantages of non-linear extrapolation procedures with linear regression.

      Keywords:
      Classification: 2d
      79 039
      A systematic study of the desorption of different ion-pairing reagents from silica-gel layers
      K. KOVACS-HADADY, (Dept. of Inorg. and Anal. Chem., Lajos Kossuth Univ., P.O. Box 21, H-4010 Debrecen, Hungary)

      J. Planar Chromatogr. 10, 18-25 (1997). Study of the distribution of different ion-pairing reagents, e.g. tetramethylammonium (TMA), tetrabutylammonium (TBA), cetyltrimethylammonium (CTMA), and trioctylmethylammonium (TOMA) by measurement of the absolute concentrations of the compounds in the stationary phase after chromatography (OPLC) on silica impregnated by immersion into a methanolic solution (0.05 M) of the reagents with methanol - water mixtures in different ratios. The behavior of acidic, neutral, and basic compounds were studied simultaneously. The chromatographic results showed good correlation with the concentration of the reagents measured on the layer.

      Keywords:
      Classification: 2d, 3b
      86 008
      Physicochemical fundamentals of planar analytical chemical test methods based on the formation of insoluble compounds
      V.G. BERETZKIN*, V.G. AMELIN, I.S. KOLODKIN, A.A. RODIONOV, (*A.V. Topchiev Inst. of Petrochemical Synthesis, Russian Acad. of Sci., Lenin av. 29, 117912 Moscow, Russia)

      J. Planar Chromatogr. 13, 254-256 (2000). Study of the physicochemical fundamentals of planar analytical test methods with analytical reagents forming poorly soluble products on reaction with the target compound. In the test methods the analytical reagent was applied to a porous planar system (paper, or an adsorbent layer spread on a support). It was shown that regularities in the planar test methods are similar to those observed in planar chromatography.

      Keywords:
      Classification: 2b, 2d