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Biennial review of planar chromatography: 2011–2013

100%
Sherma J.
Open Chemistry
|
2014
|
vol. 12
|
issue 4
427-452
EN
The most important advances in planar chromatography published between November 1, 2011 and November 1, 2013 are reviewed in this paper. Included are an introduction to the current status of the field; student experiments, books, and reviews; theory and fundamental studies; apparatus and techniques for sample preparation and TLC separations (sample application and plate development with the mobile phase); detection and identification of separated zones (chemical and biological detection, TLC/mass spectrometry, and TLC coupled with other spectrometric methods); techniques and instruments for quantitative analysis; preparative layer chromatography; and thin layer radiochromatography. Numerous applications to a great number of compound types and sample matrices are presented in all sections of the review.
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Coupling of planar chromatography with Direct Analysis in Real Time mass spectrometry

100%
Morlock G., Chernetsova E.
Open Chemistry
|
2012
|
vol. 10
|
issue 3
703-710
EN
Direct Analysis in Real Time mass spectrometry (DART-MS) is an emerging and rapidly developing area of ambient desorption ionization mass spectrometric techniques. Its coupling with planar chromatography is especially promising, as compared to other ambient desorption ionization techniques, because it does not require the use of liquids that may distort the shape of a spot by diffusion effects. In the first publications on TLC/HPTLC-DART-MS, due to the fixed, horizontally aligned supply of the gas flow from the DART ionization source to the MS inlet, the introduction of HPTLC/TLC plates as cut strips was inconvenient for quantitation, and the repeatability was very low due to the manual positioning. Recently a new version of the DART ion source was suggested, which allows adjusting the angle of the DART gas stream and the use of a motorized rail, thereby, improving highly the capabilities of TLC/HPTLC-DART-MS. This comprehensive review describes the development and analytical capabilities of TLC/HPTLC-DART-MS, and the general DART-MS perspectives for surface analysis or imaging MS. [...]
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