J. Planar Chromatogr. 21, 267-270 (2008). HPTLC of pitavastatin calcium on silica gel (prewashed with methanol) in a twin trough chamber saturated for 30 min at room temperature with toluene - methanol - glacial acetic acid 190:59:1. Quantitative determination by absorbance measurement at 238 nm. The limits of detection and quantification were 7 and 20 ng/band, respectively.

60th Indian Pharmaceutical Congress PA-226 (2008). HPTLC of olmesartan medoxomil (an angiotensin-II antagonist) on silica gel with toluene - acetonitrile - methanol - ethyl acetate - acetic acid (mobile phase ratio not specified by the authors). The hRf value was 56. Quantitative determination by absorbance measurement at 262 nm. The linearity was between 300-800 ng/spot. The method was suitable for separation of olmesartan medoxomil from degradation products obtained by forced stress conditions (acid, alkali, peroxide, light, heat).

60th Indian Pharmaceutical Congress PA-218 (2008). TLC of aceclofenac and paracetamol on silica gel with toluene - isopropylalcohol - ammonia 8:7:1. The hRf value of aceclofenac was 24 and of paracetamol 68. Quantitative determination by absorbance measurement at 254 nm. Linearity was in the range of 25-2000 ng/band with correlation coefficients of 0.9998 for aceclofenac and 0.9996 for paracetamol. The limits of detection and quantification were 25 and 150 ng/zone for aceclofenac and 50 and 200 ng/zone for paracetamol. Both drugs were subjected to acid and alkali hydrolysis, oxidative degradation, and photodegradation. The degradation products were well resolved from the pure drug.

Abstract No. F-238, 61st IPC (2009). HPTLC of salbutamol silphate and guaiphenesin, used as pharmaceutical syrup against cough, on silica gel with ethyl acetate - methanol - 25 % ammonia 15:3:2. The hRf value was 47 and 65 for salbutamol and guaiphenesin, respectively. Quantitative determination by absorbance measurement at 280 nm. The method was linear in the range of 200-1000 ng/band for salbutamol and 10-15 µg/band for guaiphenesin.

J. AOAC Int. 92, 1082-1087 (2009). HPTLC of alprazolam and fluoxetine hydrochloride in pure powder and formulations on silica gel with acetone - toluene - ammonia 12:7:1 in a twin trough chamber saturated for 30 min. Quantitative determination by absorbance measurement at 230 nm. There was no significant difference in the determined content of alprazolam and fluoxetine by HPTLC and HPLC methods (assay results compared by applying the paired t-test).

Abstract No. F-275, 61st IPC (2009). HPTLC of ivabradine HCl on silica gel with methanol - chloroform 1:1. The hRf value was 59. Quantitative determination by absorbance measurement at 285 nm. Linearity was in the range of 100-800 ng/spot with r2=0.9989 (via peak area).

Abstract No. F-257, 61st IPC (2009). HPTLC of tadalafil on silica gel with n-hexane - ethyl acetate - acetonitrile 14:3:3. The hRf value was 65. Quantitative determination by absorbance measurement at 215 nm. The method was linear in the range of 10-60 ng/band. The drug was subjected to different stress conditions (acid, alkali, oxidative, photodegradation, thermal) and showed degradation under all stress conditions. Degradation products and excipients of the formulation were well separated from the main component.

J. Planar Chromatogr. 23, 75-78 (2010). HPTLC of fluphenazine hydrochloride on silica gel (prewashed with methanol) with methanol - water 9:1 in a saturated twin-trough chamber. Quantitative determination by absorbance measurement at 306 nm. Linearity was in the range of 100 to 500 ng/µL with a correlation coefficient of 0.998. LOD and LOQ were 1.45 and 4.40 ng/zone, respectively. Intra-assay and inter-assay precision, expressed as relative standard deviation (RSD), were in the range 0.73-1.77 % (n = 3) and 1.18-1.86 % (n = 9), respectively. Recovery of fluphenazine hydrochloride was between 98.3 and 101.5 %, with RSD not higher than 1.87 %. The method was selective for fluphenazine hydrochloride and the preservatives in the injections.