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
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J Chromatogr A, 1603, 355–360 (2019). Samples were ethyl acetate root macerates of fully flowered Tanacetum vulgare (Asteraceae). HPTLC on silica gel (classical irregular particles vs. Lichrosphere with spherical particles) previously washed with methanol, dried for 5 min at room temperature, perimeter-sealed with a polymer coat, and heated for 30 min at 100 °C. Separation with toluene or with toluene – n-hexane 7:3, in classical capillary flow or in OPLC (overpressured layer chromatography). For OPLC, off-line infusion was used (closed mobile phase (MP) outlet, automatically stopping development); external pressure 50 bar, rapid MP flush 175 and 350 µL, MP flow rate 250 and 500 µL/min, 1830 and 3475 µL MP, development time 446 s and 424 s. Derivatization by immersion into vanillin – sulfuric acid reagent, followed by 5 min heating at 110 °C; or into PABA reagent (500 mg p-aminobenzoic acid, 18 mL glacial acetic acid diluted, 20 mL water, 1 mL o-phosphoric acid, 60 mL acetone), followed by 5 min heating at 140 °C. Effect-directed analysis using automated immersion: A) for free radical (DPPH•) scavengers; B) for activity against Gram-negative bacteria using Aliivibrio fischeri bioluminescence assay; C) for activity against Gram-positive bacteria with Bacillus subtilis bioassay. Four active polyynes were identified as hexadiynylidene-epoxy-dioxaspiro-decane (1), pontica epoxyde (nonene-triynyl-vinyl-oxirane) (2), tetradeca-triine-en-one (3) and trans-(hexadiynylidene)-dioxaspiro-decene (4), by hyphenating OPLC to quadrupole-orbitrap HRMS without eluent, using a DART interface (Direct Analysis in Real-Time, needle voltage 4kV, grid voltage 50 V, helium as gas, temperature 500 °C, full scan in positive ionization mode in m/z range 100-750). Polyynes (3) and (4) were coeluting in HPTLC but not in OPLC, demonstrating that (4) is not produced by oxidation during the DART-MS procedure. Separation with OPLC compared to HPTLC was performed in a shorter time and with better resolution at the same time. Layers with spherical particles gave higher resolution; zone distortions occurring in OPLC due to dissolved air in MP were prevented by previous MP sonication.
J. Liq. Chromatogr. Relat. Technol. 43, 319-327 (2020). Review of impregnated agents used in TLC and their applications in analytical and medicinal chemistry. Impregnation with inorganic ions, chelating reagents, lipophilic substances, surfactants, chiral selectors and ionic liquids were discussed.
J. of Chromatogr. A 1591, 162-170 (2019). TLC of malachite green (1) and fast green (2) on diatom biosilica (a nanostructured, porous stationary phase composed of randomly-deposited biosilica frustules isolated from living cells of diatom Pinnularia sp.) instead of conventional silica gel with 1-butanol - ethanol - water 9:1:1 and 1-butanol - acetic acid - water 5:1:2. Diatom biosilica reduced the flow velocity and permeability constant by a factor two compared to silica gel and thus improved the resolution of (1) and (2). The theoretical plate height for both analytes was reduced ten-fold with 1-butanol - acetic acid - water 5:1:2, and the difference in retention time between malachite green and fast green was increased (ΔhRF 26) with 1-butanol - ethanol - water 9:1:1.
II. Principal-Components analysis. J. Planar Chromatogr. 20, 7-11 (2007). Study of chromatographic retention data for the 3,5-dinitrobenzoic acid esters of a homologous series of aliphatic C1 - C20 linear alcohols on five unconventional TLC stationary phases - rice starch, microcrystalline cellulose, aminoplast, talc, and paraffin oil-impregnated silica gel. The stationary phases were characterized by means of retention scores obtained by principal-components analysis.
J. Planar Chromatogr. 27, 409-415 (2014). TLC of propanolol enantiomers on silica gel impregnated with 15 nm gold nanoparticles (AuNPs) and 10.0 mM L-cysteine (L-cys) pH = 8.1, as first and second layer, respectively and developed with 10.0 mM copper(II) acetate, in 70% ethanol – water adjusted at pH 6.3.
J. Chromatogr. 299, 460-464 (1984). Two-dimensional TLC of triglycerides on silica having a strip of octadecyl-bonded silica along one side. Development with dry acetone - acetonitrile 4:1, three times along the reversed-phase band, then with dried toluene - ethanol - free chloroform 1:1 at right angles, after impregnating the plate with silver nitrate solution. Visualization with molybdatophosphoric acid reagent.
H. TRAITLER, A. STUDER, R.E. KAISER (eds): Instrumental HPTLC, Institute for Chromatography, Bad Dürkheim, FRG (1987), 349- 359. Investigations on the application of chitin as a TLC stationary phase, especially a-chitin. Possibilities of obtaining mechanically and chromatographically stable precoated chitin layers. Application in the separations of amino acids and dyes.