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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      127 005
      Utilization of a crown ether/amine‐type rotaxane as a probe for the versatile detection of anions and acids by Thin‐Layer Chromatography.
      S. MIYAGAWA, M. KIMURA, S. KAGAMI, T. KAWASAKI, Y. TOKUNAGA* (*Department of Materials Science and Engineering, University of Fukui, Bunkyo, Fukui, Japan; tokunaga@u-fukui.ac.jp)

      Chem. Asian J. 15(19), 3044-3049 (2020). The studied rotaxane combines a dibenzocrown of 8 ethers (DB24C8) with an axle chain (Ax) containing two amines, one of them in an aniline group, allowing stability of the rotaxane even when the other one is unprotonated. TLC on silica gel in 4 steps, with detection under UV light or after derivatization with phosphomolybdic acid in ethanol. (1) Before the synthesis of the rotaxane, unprotonated Ax was isolated by preparative TLC of the protonated Ax obtained by addition of HCl or toluenesulfonic acid (TsOH); the mobile phases were chloroform – methanol 10:1 and toluene – tetrahydrofurane 3:2, respectively. The isolated molecules were confirmed as totally unprotonated Ax by NMR, suggesting a complete loss of HCl and TsOH on the silica gel layer. (2) After synthesis, unprotonated rotaxane, pure vs. monoprotonated by the addition of 10 different acids (and purified by column chromatography CC), was applied on TLC plates and developed with dichloromethane – acetone – water 3:16:1; the hRF values were very different, depending on the counter-anions from the used acids. (3) The same behavior (except with sulfuric acid) was observed under the same conditions when CC was omitted (unprotonated rotaxane samples were mixed with each of the acids, or with two acids at the same time for acid-competitive TLC analysis). (4) When unprotonated rotaxane was applied under the same conditions as in step (3) with the sodium salts instead of the acids, the behavior was similar (except for the shapes of the spots, due to the salts in excess). The rotaxane can thus be used for the TLC separation and detection of sodium salts, by forming salts of protonated rotaxane with the anion afforded by these sodium salts. The rotaxane protonation seems to be promoted by the methanol of the spotting mixture; indeed, when step (3) was performed with the mobile phase chloroform – methanol 10:1, a second zone appeared because methanol formed a salt with the rotaxane (identified by NMR).

      Classification: 4e, 5a, 5b, 17a
      115 017
      Resonance driven regioselective demethylation of berberine
      A. DELGADO, C. JAME, V. CEBOLLA, O. LARRAÑAGA, A. DE CÓZAR, F. COSSIO, Y. VARA, A. DOMÍNGUEZ, L. MEMBRADO, J. GALBÁN, R. GARRIGA* (*Institute of Carbon Chemistry, CSIC, Zaragoza, Spain, vcebolla@icb.csic.es)

      Microwave assisted synthesis of berberrubine and its assessment as fluorescent chemosensor for alkanes. Tetrahedron. 71, 6148-6154 (2015). HPTLC of berberrubine and mixtures with known proportions of alkanes with different number of C atoms on silica gel with n-heptane over 30 mm migration distance, followed by heating at 65 °C for 30 min. Quantitation of non-absorbing alkanes by fluorescence determination at UV 365/>400 nm.

      Classification: 5a, 5d
      88 031
      Quantitative determination of olaquindox in animal feed
      E. ROETS*, I. QUINTENS, R. KIBAYA, J. HOOGMARTENS, (*Lab. for Pharm. Chem. and Drug Anal., Van Evenstraat 4, B-3000 Leuven, Belgium)

      J. Planar Chromatogr. 14, 347-349 (2001). TLC of olaquindox, on silica gel plates with ethyl acetate - acetone - ethanol 62:40:3; development in a saturated chamber. Quantitative determination by densitometry at 360 nm. The method is also selective for the antibiotics tetracycline and tylosin. New simple, relatively rapid procedure.

      Keywords:
      Classification: 5a, 28a
      118 027
      Phytochemical study of Eryngium triquetrum – isolation of polyacetylenes and lignans
      Fouzia BOUZERGOUNE, Maria-Letizia CIAVATTA*, Fatma BITAM, Marianna CARBONE, M.C. ABERKANE, Margherita GAVAGNIN (*Institute of Biomolecular Chemistry, branch of Naples, 80078 Pozzuoli, Campania, Italy; lciavatta@icb.cnr.it)

      Planta Medica 82 (16), 1438-1445 (2016). TLC on silica gel with chloroform – methanol 19:1, followed by detection under UV 254 nm and spraying with 10 % sulfuric acid with heating. TLC was used for 1) the ethyl acetate fraction of a hydromethanolic extract of Eryngium triquetrum aerial parts, and 2) for the monitoring of its fractionation on a cyclodextrin column, and of the fractionation of a selected fraction on silica gel column. The (chloroformic) first subfraction of the last step was found to contain only the polyyne alcohol falcarinol (panaxynol, carotatoxin) at hRF 90.

      Classification: 5a, 6, 8a, 32e
      120 028
      Biotransformation and detoxification of xylidine orange dye using immobilized cells of marine-derived Lysinibacillus sphaericus D3
      P. DEVI*, S. WAHIDULLAH, F. SHEIKH, R. PEREIRA, N. NARKHEDE, D. AMONKAR, S. TILVI, R.M. MEENA (*Chemical Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa, India; dprabha@nio.org)

      Marine Drugs 15 (2), 30 (2017). The degradation of the synthetic xylidine orange dye (sodium 1-(dimethylphenylazo)-2-naphthol-6-sulfonate) into colorless and less toxic derivatives was performed by Lysinibacillus sphaericus D3 (immobilized on alginate gel) and monitored by TLC on silica gel with methanol – chloroform 1:19. Detection of fluorescent zones under UV 366 nm.

      Classification: 5a, 24, 30a
      55 017
      Long chain phenols
      A. DURRANI, G. SUN, J. TYMAN

      Synthesis of oxidative degradation products from the methylated component. Phenols of anacardium occidentale and other phenolic lipids: confirmation of the structure of the parent phenols and of a related material. Lipids 17, 561-569 (1982). Isolation of the degradation products of anacardic acid, cardol, 2-methyl-cardol and cardanol by TLC on silica with a) chloroform, b) chloroform ethyl acetate 95:5, c) chloroform - petrol ether 6:4. Detection and visualization acc. to J. Caplin and J. Tyman, J. Chem. Res. 5, 34-35, 11, 0321- 0351 (1982).

      Classification: 5a, 7, 32e
      57 011
      The role of electric interaction in the retention index concept
      H. LAMPARCZYK

      Universal interaction indices for GLC, HPLC and TLC. Chromatographia 20, 283-288 (1965). Proposal of universal interaction indices used in TLC, GLC and HPLC, which can be easily calculated from commonly used retention parameters, such as Rf values, relative retention times etc. Presentation of the calculation examples for polycyclic aromatic hydrocarbons and n-alkanes. Demonstration of the application of the electric interaction indices for studying the retention mechanism.

      Keywords:
      Classification: 2b, 5a, 5b
      57 042
      Clathration of n-alkanes on thin-layer chromatography plates
      G. KOVACHEV, T. MINCHEVA, M. DACHEVA

      V. Danube Symposium on Chromatography, Yalta, November 11-16, 1985. TLC of n-alkanes on silica with hexane - ether 1:1. Identification with Rhodamine GG. Extraction from scraped area with ether.

      Classification: 5a