Biochem. Biophys. Res. Commun. 536, 73-79 (2021). HPTLC of ceramide dihexosides (lactosylceramide and its structural isomer, galabiosylceramide) in human cerebrospinal fluid on silica gel with chloroform - methanol - water 65:25:3. Detection by spraying with orcinol reagent, followed by heating at 120 ºC for 10 min.

J. Sep. Sci. 43, 3885-3901 (2020). HPTLC of erianin and gigantol in the stems of Dendrobium hercoglossum on polyamide film with methyl benzene - ethyl formate - formic acid 6:3:1. Detection by spraying with 10 % ethanol solution of sulfuric acid, followed by heating at 105 ºC.

Phytochem. Anal. 31, 711-721 (2020). HPTLC of 13 aporphine and four benzylisoquinoline-type alkaloids in the twigs of Ocotea spixiana on silica gel with propanol - water - ammonium hydroxide 18:2:1. Detection by desorption electrospray ionisation mass spectrometry (DESI-MS).

Phytochem. Anal. 31, 801-808 (2020). HPTLC of agarwood on silica gel with chloroform - methanol - distilled water 10:7:5. Detection by absorbance measurement at 254 nm. Agarotetrol was used as reference substance. Qualitative results were in agreement with the liquid extraction surface analysis mass spectrometry method.

J. Chinese Trad. Patent Med. 41 (3), 516-521 (2019). Yiqi Tongmai Capsule is a herbal TCM for activating blood circulation and regulating veins, as to relieve dizziness, chest tightness, chest pain caused by blood stasis. HPTLC for quality control on silica gel (1) for Ligusticum chuanxiong hort, with n-hexane - ethyl acetate 3:1 after presaturation of plates for 20 min, detection under UV 366 nm; (2) for Radix paeoniae rubra, with chloroform - ethyl acetate - methanol - formic acid 80:10:40:1 after presaturation of plates for 20 min, detection by spraying with 5 % vanilline in sulfuric acid - ethanol 1:4 and heating at 105 ˚C until the zones are detected in daylight, comparison with the standard  paeoniflorin; (3) for Panacis Quinquefolii Radix and Panaxnotoginseng (Burk.) F.H.Chen with trichloroform - anhydrous ethanol - water 10:10:1 after presaturation of plates for 15 min, detection by spraying with 10 % solution of sulfuric acid - ethanol 1:4 and heating at 105 ˚C until the zones are detected in daylight and under UV 366 nm, identification by comparison with the standards notoginsenoside R1, ginsenoside Rg1, Re, Rb1 and pseudoginsenoside F11.

J. of Chromatogr. Sci. 57 (9), 799 - 805 (2019). Description of a method for the quantification of R, R-glycopyrronium bromide (GLY) and its related impurities in drug substance and drug product by HPTLC on silica gel with dichloromethane - methanol - formic acid 20:1:1. GLY and its related impurities (glycopyrronium impurity G and glycopyrronium impurity J) were separated with hRf values of 17, 34 and 69, respectively. Quantitative determination at 220 nm in the range of 0.3 - 10 and 0.2 - 4.0 μg/zone. The LOD and LOQ were 0.1, 0.3 and 0.05, 0.2 μg/zone for GLY and its related impurities, respectively. The recovery was 99.5 ± 1.4, 100.0 ± 1.3 and 99.6 ± 0.8 and R2 ≥ 0.9968 for GLY and its impurities, consecutively.

J. Planar Chromatogr. 33, 439-448 (2020). HPTLC fingerprint of 182 samples of Sclerocarya birrea and traditional medicines on silica gel with ethyl acetate - formic acid - water 8:1:1. Detection by heating at 100 ºC for 3 min, following by cooling and derivatization with natural products reagent (1.0 g of 2-aminoethyl diphenylborinate in 100 mL of methanol) and subsequently with anisaldehyde reagent (170 mL of ice-cooled methanol with 20 mL of acetic acid, 10 mL of sulfuric acid, and 1 mL of anisaldehyde), and heating at 100 ºC for 3 min. Quantitative determination of quercetin-3-O-rhamnoside by absorbance measurement at 254 nm.

J. Planar Chromatogr. 33, 413-418 (2020). HPTLC of metanil yellow in colored sweets on silica gel with ethyl acetate - methanol - 25 % ammonia - water 35:11:5:5. Detection at UV 430 nm. The hRF value for metanil yellow was 56.