Silica plates

HPTLC plates Silica gel 60 (Merck) pre-washed by a single development with chloroform-methanol (50+50). The layers were preconditioned for 30 min over water after the sample had been applied. 

TLC plates Silica gel 60 W or HPTLC plates Silica gel 60 WRp254s (Merck) SIL G-25 or Nano-Sil-20 (Macherey-Nagel). 

Layer HPTLC plates Silica gel 60 F254 (Merck). 

HPTLC plates Silica gel 60 F254S with concentrating zone (Merck), which had been prewashed by developing once with chloroform — methanol (50 + 50) and then dried at 110°Cfor30 min. 

HPTLC plates Silica gel 60 WRF2458 (Merck). After application of the samples the plate was preconditioned for 30 min at 0% relative humidity. 

TLC plates Silica gel 60 (Merck) impregnated by dipping once in a 10% solution of polyethylene glycol 1000 in methanol. 

HPTLC plates Silica gel 60 (Merck) which were prewashed by developing three times in chloroform — methanol (50 - -50) and drying at 110°C for 30 min. 

HPTLC plates Silica gel 60 F254 (Merck). The plates were prewashed by developing once to the upper edge with chloroform — methanol (1 -t-1) and then activated at 110 °C for 30 min. 

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