J. Planar Chromatogr. 17, 22-25 (2004). HPTLC and TLC of caffeic acid, rosmarinic acid, caffeetannins and flavonoids on silica gel, amino-, cyano-, and RP-18-phases in a horizontal DS-chamber with a variety of mobile phases at room temperature. Acetone - acetic acid 17:3 was best mobile phase on the aminopropyl layer; water - methanol 3:2 on RP 18. Detection of the colored compounds under UV light at 365 nm before and after spraying with 2 % methanolic aluminum chloride solution, or in visible light after treatment with bis-diazotized sulfanilamide.

Chinese J. Trad. Patent Med. (Zhongchengyao) 26 (2), 113-115 (2004). TLC of Qirong medicinal wine on silica gel with 1) n-hexane - ethyl acetate 4:1; 2) petroleum ether (30-60 ºC) - ethyl acetate - formic acid 15:5:1; 3) chloroform - methanol 9:1; 4) ethyl acetate - acetone - formic acid - water 5:5:1:1. Detection 1) under UV 365 nm, and by spraying with 5 % KOH in methanol and under UV 365 nm. Identification by fingerprint techniques. Quantification of psoralen and isopsoralen by HPLC.

Chinese J. Trad. Patent Med. (Zhongchengyao) 26 (7), 544-547 (2004). TLC of Quzhi capsule extracts on silica gel with 1) toluene - chloroform - acetone 8:15:5; 2) petroleum ether (60-90 ºC) - ethyl acetate 20:1. Detection 1) by exposing to ammonia vapors and under UV 365 nm; 2) by spraying with p-dimethylaminobenzaldehyde in 10 % H2SO4 - ethanol solution followed by heating. Identification by fingerprint technique. Quantification of chrysophanol by HPLC. Discussion of applying the procedures for the quality control of the medicine.

Chinese J. Trad. Patent Med. (Zhongchengyao) 26 (4), 341-343 (2004). TLC of Changchun Hongyao capsule extracts on silica gel with n-hexane - ethyl acetate 1:1. Detection by spraying with 5 % solution of potassium iodobismuthate. Identification by fingerprint techniques. Quantification of aconitine by HPLC.

IPC 56th 2004, Abstract No. G-28. Neem Oil obtained from the seed kernels of Azardirachla indica (Meliaceae) is a fixed oil known as oil of Margosa. An HPTLC method is reported for the analysis of Neem oil as a bulk drug and formulations containing oil. TLC of neem oil extracted with chloroform, on silica gel with chloroform - n-hexane - methanol 18:2:1. Quantitative determination by scanning at 254 nm. The linearity range was 100 – 500 mg/mL. Formulations were found to contain 0.35 g/g of Neem Oil.

IPC 56th 2004, Abstract No. GP-17. HPTLC of mirtazapine in tablet dosage form on silica gel with chloroform - methanol 1:9. The Rf value was 0.50 - 0.52, the linearity range was 0.3 - 1.5 mg/spot. Quantitative determination by scanning at 295 nm. The method was validated for accuracy, precision, linearity, specificity, LOD, and LOQ.

Chinese J. Trad. Pat. Med. (Zhongchengyao) 27 (2), 225-227 (2004). TLC on silica gel with 1) petroleum ether (30 - 60 ºC) - ethyl acetate 9:1; 2) benzene - glacial acetic acid 4:1. Detection 1) by spraying with 1 % vanillin solution and heating at 105 ºC for 10 min; 2) under UV 365 nm. Identification by fingerprint technique. Quantification of ferulic acid by densitometry at 325 nm. Validation of the method by investigation of linearity (0.16 µg - 1.6 µg, r = 0.9992); precision (RSD = 1.8 %, n= 5 within plate and RSD = 2.3 % plate to plate); reproducibility of five time assay towards the same sample (RSD = 0.5 %); and standard addition recovery (97.17 %, RSD = 0.9 %, n = 5). The results for three real life samples are given.

J. Planar Chromatogr. 18, 455-459 (2005). HPTLC of erythromycin, troleandomycin (oleandomycin triacetate), tylosin, rifamycin B, and rifampicin on silica gel and on RP-18 in a presaturated chamber with wide-ranging mixtures containing 0 to 100 % esters or ketones in dimethyl sulfoxide or hexamethyldisiloxane. Detection by spraying with a mixture of concentrated sulfuric acid and methanol 1:4 followed by heating at 120 °C for 10 min. Chromatographic retention data and a possible retention mechanism are discussed.