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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Anal. Bioanal. Chem. 412, 4527-4536 (2020). HPTLC of 20 chemicals representative of migrants from plastic food contact materials on silica gel with chloroform - acetone - petroleum ether 11:5:5. Yeast estrogen screen was performed by spraying with yeast culture, followed by incubation at 30 ºC for 3 h. Detection by spraying with the indicator (2 mL 0.5 mg/mL 4-methylumbelliferyl-β-D-galactopyranoside-MUG in lacZ buffer), followed by incubation at 37 ºC for 20 min. Qualitative identification under UV light at 366 and 550 nm. The method was more sensitive than a microtiter plate YES (lyticase-YES).
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).
J. of Chromatogr. A 1568, 188-196 (2018). Mass spectra by DART-MS were recorded directly in situ the bioautogram, immediately after direct bioautography (DB). This allowed to detect bioactive analytes within the bioautogram and discriminate microorganism cells and polar bioassay medium ingredients which could otherwise stress the MS system. DB-DART-MS was used for bioactive compounds in cosmetics using the Bacillus subtilis and Aliivibrio fischeri bioassays for detection of Gram-positive and Gram-negative antimicrobials. Planar yeast estrogen screen was used for detection of estrogen-effective compounds. HPTLC-DART-MS of parabens in hand creams either on silica gel with petroleum ether - glacial acetic acid 20:3 or on RP-18W with methanol - water 1:1. Detection under UV 254 and 366 nm. Bioassay by immersing the neutralized chromatograms into the bacterial suspensions.
J. Planar Chromatogr. 25, 344-348 (2012). HPTLC of two oil-soluble sunscreens, namely avobenzone (1) and octyl salicylate (2) and a water-soluble sunscreen, namely phenylbenzimidazol sulfonic acid (3) on silica gel with cyclohexane - diethyl ether 5:1 for (1) and (2) and ethyl acetate - ethanol - water 14:7:6 for (3). Quantitative determination by absorbance measurement at 300 nm for (2) and (3), and 360 nm for (1). Limits of detection and quantification were found to be 30 and 80 ng/zone for (1), and 20 and 60 ng/zone for both (2) and (3).
J. Chromatogr. 302, 149-158 (1984). HPTLC of polycyclic aromatic hydrocarbons on different stationary phases with various mobile phases in several development modes, conventional, continuous, and multiple development. Reversed-phases in separation using RP-18 silica and methanol - water or methanol - water based ternary solvent system gave the best result.
J. Chromatogr. 463, 452-456 (1989). TLC of title compounds on silica with 4 different solvent systems. Detection under UV. Identification by melting point and UV spectra after elution with different solvents.
Part VII. J. Planar Chromatogr. 7, 389-393 (1994). TLC of stereoisomeric menthols and thujols (menthol, neomenthol, isomenthol, neoisomenthol, thujol, neothujol, isothujol, neoisothujol) on silica with hexane - ethanol 85:15 for menthols and benzene for thujols, each plate was developed three times. A new stereoisomeric topological index has been proposed (ISTI) which enables distinction between stereoisomers with hydroxyl groups in axial and equatorial positions.
J. Chromatogr. A 779, 321-328 (1997). Presentation of a new modelling of the TLC process in the form of 3rd degree functions. Use of some computer programs for selection of the optimum composition of the benzene - acetone - water mobile phase on RP-8 and RP-18, allowing the choice of a mobile phase which ensures the best resolution.