Chinese J. Pharm. Ind. (Zhongguo Yigao Gongye Zazhi) 20, 75-78 (1989). TLC of artemether or artesunate and their metabolite, dihydroartemisinine, on silica with cyclohexane - chloroform - ethyl acetate - acetic acid 24:12:1:0.5. Quantification by densitometry at 620 nm.

Magyar Kémiai Folyóirat, 97, 196-205 (1991). TLC of 2-methylenecephalosporins and 2-spirocyclopropyl-cephalosporins on silica with benzene - ethyl acetate 1:1, benzene - ethyl acetate - acetic acid 7:3:1, hexane - ethyl acetate 1:1, chloroform - ether 3:2 or 9:1. Detection under UV and by spraying with ammonium molybdate.

J. Planar Chromatogr. 9, 56-61 (1996). HPTLC of aloin and aloe-emodin on NH2-bonded silica with ethyl acetate - 2-propanol - water 100:17:13. Quantification by densitometry at 370 nm (for aloin) and 480 nm (for aloin and aloe-emodin).

J. AOAC Int. 82, 244-247 (1999). HPTLC of tinidazole and metronidazole (as internal standard) on silica gel with chloroform - acetonitrile - acetic acid 30:20:1. Quantitation by densitometry at 320 nm. The linearity (1-10 ng), precision (6%), reproducibility (5%), recovery (96%), and detection limit (1 mg/L) of tinidazole determination by HPTLC were comparable with corresponding method parameters by RP HPLC. A satisfactory correlation was found between the 2 analytical methods. Simple and specific HPTLC method.

J. Chromatogr. A 1173 (1-2), 146-150 (2007). HPTLC of oenothein B and quercetin glucuronide in aqueous extract of Epilobii angustifolii herba on RP-18 W phase with 1) 25 % acetonitrile in water (with 50 mM H3PO4) over 80 mm for oenothein B, and 2) with acetonitrile over 40 mm for quercetin glucuronide. Quantification of oenothein B and quercetin glucuronide by densitometry at 270 and 350 nm, respectively. Linearity was between 1.14 and 2.28 µg/zone for oenothein B and 77 and 691 ng/zone for quercetin glucuronide. Aqueous extract of Epilobii angustifolii herba contained 152.46 ± 4.92 mg/g oenothein B and 22.07 ± 1.38 mg/g quercetin glucuronide.

J. Chromatogr. Sci. 46 (1), 4-9 (2008). Presentation of a simple and accurate stability-indicating method for the quantitative determination of ribavirin in its bulk and capsule forms by TLC on silica gel aluminium layer with chloroform – methanol – acetic acid 4:1:1. Detection by spraying with anisaldehyde reagent. Ribavirin is found to undergo degradation under all stress conditions, and the degradation products are well resolved from the pure drug with significantly different Rf values. Linearity was between 5 and 40 µg/spot (r = 0.9980). The limit of detection and of quantification was 1 and 5 µg/spot, respectively. Application of the proposed TLC method for the determination of ribavirin in pure form and in capsules, with good accuracy and precision. The results obtained by the proposed TLC method are comparable with those obtained by the official method.

J. Pharm. Res. 8(1), 9-11 (2009). HPTLC of clerodendrin A in Clerodendrum phlomidis and Ptemna integrifolia root on silica gel with n-hexane - ethyl formate 7:3. Detection by spraying with a 5 % aqueous solution of H2SO4, followed by heating at 110 °C. Quantitative determination by absorbance measurement at 396 nm. Clerodendrum phlomidis roots contained more clerodendrin A (0.07 %) than roots of Ptemna integrifolia (0.04 %).

Chinese J. Pharm. Anal. 28 (11), 1800-1803 (2008). TLC of adenosine and adenine in Lingzhi capsules on silica gel with chloroform – ethyl acetate – i-propanol – water 16:6:3:1. Detection under UV 254 nm. The method is simple, fast and accurate and can be used for the quality control of the medicine.