J. Planar Chromatogr. 34, 403-410 (2021). HPTLC of Meyna spinosa on silica gel with ethyl acetate - water 10:1. Detection by spraying with anisaldehyde‒sulfuric acid reagent and visualized under UV light at 366 nm. Further analysis by high-performance liquid chromatography coupled with electrospray ionization‒quadrupole-time of flight‒mass spectrometry (LC‒ESI‒Q-TOF‒MS).

J. Planar Chromatogr. 34, 427-435 (2021). HPTLC of phyllanthin (1) and hypophyllanthin (2) in Phyllanthus amarus on silica gel with toluene - ethyl acetate 17:3. Quantitative determination by absorbance measurement at 254 nm. The hRF values for (1) and (2) were 21 and 35, respectively. Linearity was between 2 ans 7 μg/zone for (1) and (2). LOD and LOQ were 1 and 3 μg/zone for (1) and (2), respectively. Intermediate precisions were below 2 % (n=3).

J. Planar Chromatogr. 34, 377-401 (2021). HPTLC of flavonoid glycosides, phloroglucinol glycosides, monoterpene glycosides and monoterpene sugar esters, triterpenoids, phloroglucinols, monomeric phloroglucinols, dimeric phloroglucinols and phloroglucinol-terpene adducts in 15 eucalypts (13 Eucalyptus and 2 Corymbia) on silica gel with multiple mobile phases. Detection by spraying with anisaldehyde-sulfuric acid reagent. Zones were scanned from 200 to 700 nm.

J. Planar Chromatogr. 34, 437-446 (2021). HPTLC of phenolic compounds in the leaf extract of Costus pictus on silica gel with chloroform - glacial acetic acid - methanol - water 16:8:3:2. Compounds with the same hRF values were analyzed by high-performance liquid chromatography, diode array detector and tandem mass spectrometry.

J. Planar Chromatogr. 34, 419-426 (2021). HPTLC of brazilin on silica gel with chloroform - acetone - formic acid 8:4:1. Detection by exposure to ammonia vapor, followed by spraying with aluminum chloride. Quantitative determination by absorbance measurement at 508 nm. Linearity was between 0 to 6 μg. Intermediate precisions were below 3 %. Recovery was between 100 and 105 %.

J. Planar Chromatogr. 34, 323-328 (2021). HPTLC of plumbagin in the roots of Plumbago zeylanica on silica gel with toluene - ethyl acetate 9:2. Quantitative determination by absorbance measurement at 270 nm. The hRF value for plumbagin was 84. Linearity was between 100 and 600 ng/zone. LOD and LOQ were 70 and 200 ng/zone, respectively. Intermediate precisions were below 2 % (n=3). Average recovery was 98.8 %.

J. Planar Chromatogr. 34, 329-336 (2021). HPTLC of piperine in the leaves of Piper trichostachyon on silica gel with n-hexane - ethyl acetate 1:3. Quantitative determination by absorbance measurement at 342 nm. The hRF value for piperine was 50. Linearity was between 100 and 700 μg/μL. LOD was 100 μg/μL. Intermediate precisions were below 3 %. Average recovery was 105.8 %.

J. Pharm. Biomed. Anal. 189, 113488 (2020). Various extracts from red alga Plocamium dilatatum (Plocamiaceae), green alga Codium fragile tasmanicum (Codiaceae) and brown algae Carpoglossum confluens (1), Cystophora platylobium (2) and C. retorta (3) (Sargassaceae), Ecklonia radiata (Lessoniaceae), Hormosira banksia (Hormosiraceae), Phyllospora comosa (4) (Seirococcaceae) were separated on HPTLC silica gel with n-hexane – ethyl acetate – acetic acid 70:27:3. Detection A) for antioxidant activity by spraying with methanolic DPPH solution, followed by waiting for 30 min at room temperature; B) for steroids and terpenes with anisaldehyde - sulfuric acid solution, followed by heating for 10 min at 110°C; C) for carbohydrates and polyols with thymol - sulfuric acid, followed by heating for 15-20 min at 120°C. Image-based evaluation in white light and UV 366 nm. The most active bands were also characterized by ATR-FTIR (= attenuated total reflectance – Fourier-transformed infrared) spectroscopy.