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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      108 014
      Planar solid phase extraction - A new clean-up concept in multi-residue analysis of pesticides by liquid chromatography - mass spectrometry
      Claudia OELLIG, W. SCHWACK* (*Inst. of Food Chem., Univ. of Hohenheim, Garbenstrasse 28, 70599 Stuttgart, Germany)

      J. of Chromatogr. A 1218 (37), 6540-6547 (2011). New approach and application of highly automated planar chromatographic tools for powerful clean-up, called high-throughput planar solid phase extraction (HTpSPE), which is indispensable for preventing matrix effects in multi-residue analysis of pesticides in food by liquid and gas chromatography coupled to mass spectrometry, employing TLC to completely separate pesticides from matrix compounds and to focus them into a sharp zone, followed by extraction of the target zone by the TLC-MS interface, thus resulting in extracts nearly free of interference and free of matrix effects, as shown for seven chemically representative pesticides in four different matrices (apples, cucumbers, red grapes, tomatoes), and completion of clean-up of one sample in a manner of minutes. Regarding the clean-up step, quantification by LC–MS with mean recovery (against solvent standards) of 90–104% and relative standard deviations of 0.3–4.1% (n = 5) for two spiking levels of 0.1 and 0.5 mg/kg.

      Classification: 3a, 29
      64 014
      Assessment of suitability of the florisil and CB clean-up procedures for determining aflatoxin levels in Sorghum by bidirectional HPTLC
      K. JEWERS*, A.E. JOHN, G. BLUNDEN, (*Overseas Development Natur. Resou. Inst., Chatham Maritime, Central Avenue, Chatham, Kent, ME 44TB, England)

      Chromatographia 27, 617-621 (1989). Evaluation of the florisil clean-up procedure for its suitability of quantifying aflatoxin in sorghum grain by bi-directional HPTLC. Investigation of the accuracy and precision of the method. Detec tion limits, 0.13˜0.36 µg/kg. Comparison with the AOAC CB method.

      Classification: 3a, 28b
      108 015
      Planar solid phase extraction - a new clean-up concept in residue analysis of pesticides
      Claudia OELLIG*, W. SCHWACK (*Institute of Food Chemistry, University of Hohenheim, 70599 Stuttgart, Germany,

      CBS 107, 9-10 (2011). Extraction of pesticides from fruit and vegetable samples by QuEChERs method. TLC of acetamiprid, azoxystrobin, chlorpyriofos, fenarimol, mepanipyrim, penconazole and pirimicarb on amino phase aluminum foil (prewashed with acetonitrile) with acetonitrile over a migration distance of 75 mm in the first direction. After drying development in the backwards direction over 45 mm with acetone. Evaluation under UV 254 nm, UV 366 nm, white light and under UV 366 nm after immersion in primuline solution. Extraction of the target zone by TLC-MS interface with acetonitrile - 10 mM ammonium formate 1:1. Average recoveries of the seven pesticides were 90-104 % with %RSD of 0.3-4.1 % (n = 5). This new high-throughput planar solid phase extraction method for multi-residue analysis of pesticides in food allows a rapid and efficient clean-up at low costs and low solvent consumption.

      Classification: 3a, 29
      66 116
      A comparative study of phenyl bonded phase, CB and Romer clean-up procedures for determining aflatoxin levels in maize by bi-directional HPTLC
      N. BRADBURN*, R.D. COKER, K. JEWERS, (*Overseas Dep. Natur. Resour. Inst., Cent. Avenue, Chatham Maritime, Chatham, Kent ME4 4TB, UK)

      Chromatographia 29, 177-181 (1990). Evaluation of a modified phenyl non-polar bonded-phase clean-up procedure for bi-directional HPTLC. Separation of aflatoxins in aqueous acetone extracts of maize on silica. Evaluation of the accuracy and precision of the method for a range of aflatoxin concentrations between 3.4 and 901 µg/kg, CV = 1.7-10.8%, with mean recoveries of 92-99%. Discussion of the systematic errors and the detection limits. Comparison of the method with CB and Romer ones.

      Classification: 3a, 28b
      111 012
      Solid phase extraction as clean-up for pesticide residue analysis of tea samples using planar chromatographic developing techniques CBS 110, 12-15 (2013)
      W. SCHWACK, Claudia OELLIG* (*Institute of Food Chemistry, University of Hohenheim, 70599 Stuttgart, Germany,

      Clean-up of matrix-rich samples using high-troughput planar solid phase extraction (HTpSPE). Black and green tea samples were spiked with 7 pesticides (acetamiprid, azoxystrobin, chlorpyrifos, fenarimol, mepanipyrim, penconazole, and primicarb) at level 0.01, 0.1 and 1 mg/kg. Extraction with acetonitrile, pre-cleaning by dispersive SPE. TLC on silica gel (prewashed with acetonitrile) of samples applied as rectangles of 3 x 16 mm first with acetonitrile - water 19:1 over 85 mm and after drying for 5 min with acetone - water 7:1 in the opposite direction over 31 mm. Detection under UV 254 and 366 nm and by dipping in primuline reagent (0.2 % in acetone - water 4:1) and detection under UV 366 nm and white light. Elution of target zones into autosampler vials by TLC-MS Interface with acetonitrile - 10 mM ammonium formate buffer 1:1, flow rate 0.2 mL/min. After clean-up the samples are free of caffeine which interferes with pesticide detection.

      Classification: 3a, 29f
      67 026
      Direct coupling of OPLC with HPLC
      E. MINCSOVICS*, M. GARAMI, E. TYIHAK, A.M. SIUOFFI, (*Factory of Laboratory Instruments Co. Ltd, Thaly K. ut 41, P.O. Box 33, H-1450 Budapest, Hungary)

      Proc. 6th Int. Symp. Instrum. Planar Chromatogr., (Interlaken 1991), Inst. Chromatogr., Bad Dürkheim, FRG, 231-234 (1991). The sample preparation system includes an OPLC chamber as an interface where samples of interest are migrated toward the column of an HPLC system. Another way of clean-up is the combination of conventional TLC with OPLC transfer. According to the chromatographic properties of unwanted sample materials, the impurities in front and/or starting zone can be eliminated while analyzable compounds from the localized area of the layer can be transferred to the HPLC system.

      Classification: 3a, 4d
      116 013
      An extraction method for 17?-ethinylestradiol from water using a new kind of monolithic stir-bar
      B. SPANGENBERG*, S. FUTTERKNECHT, W. HEMMER (*University of Offenburg, Institute of Process Engineering, Badstrasse 24, 77652 Offenburg, Germany,

      J. Planar Chromatogr. 28, 472-475 (2015). HPTLC of 17α-ethinylestradiol (extracted from water samples using a monolithic stir-bar) on RP-18 with methanol - acetonitrile - water 2:2:1. Detection by heating at 110 °C for 10 min followed by dipping into a mixture of sulfuric acid 98 % in water 1:49 for 1 s. After dipping the plate was heated again to 110 °C for 10 min. The hRF value for 17α-ethinylestradiol was 51.

      Classification: 3a
      67 028
      Sample preparation and isolation using planar chromatographic methods
      SZ. NYIREDY, (Dep. Pharm., Swiss Fed. Inst. Technol. (ETH) Zürich, CH-8092 Zürich, Switzerland)

      Anal. Chim. Acta 236, 83-97 (1990). Summary of the state of art of various preparative planar liquid chromatographic methods for off-line and on-line sample application. Discussion of sample purification possibilities for PLC techniques. Suggestions in form of flow charts for purification and isolation strategies using forced-flow planar chromatographic techniques, such as OPLC, etc.

      Keywords: review
      Classification: 3a