Food Chem. 110, 538-546 (2008). TLC of wax esters of oilfish (Ruvettus pretiosus) and escolar (Lepidocybium flavobrunneum) on silica gel with xylene. Detection by spraying with 40 % sulfuric acid in ethanol - anisaldehyde 9:1, followed by heating at 100 °C for 2 min or until color is observed. The hRf value of wax esters was 60. The method was compared with DNA sequencing and GC-MS. The TLC method is inexpensive, provides a reliable result within 30 min, and is suitable for screening of numerous samples.

by HPTLC. Abstract No. 9191, IHCB (2009). HPTLC of (-)hydroxy citric acid (the main constituent of Garcinia gummigutta fruits) on silica gel with n-propanol - water - glacial acetic acid 50:50:1. Quantitative determination by absorbance measurement at 210 nm. The hRf value was 46. The method was linear in the range of 100-1000 ng/spot, recovery was 99.8-100.9 %.

Research J. Pharm. and Tech. 3(3), 825-827 (2010). TLC on silica gel (plates pre-washed with methanol) with chloroform - methanol 4:1. The hRf value of aceclofenac was 38 and of diacerein 66. Densitometric evaluation at 256 nm. The linearity range was 10-50 µg/band for aceclofenac and 5-25 µg/band for diacerein. The recovery was in the range of 99.3-101.8 % for both compounds. The method was suitable for routine quality control of combined dosage forms without any interference from the excipients.

Indian Drugs 47(11), 68-72 (2010). TLC on silica gel with ethyl acetate - acetic acid - water 15:3:2. The hRf value was 57. Densitometric evaluation at 265 nm. The method was linear in the range of 200-2400 ng/band. The method was suitable for routine quality control of the drug in formulation as there is no interference from excipients.

62nd Indian Pharmaceutical Congress Abstract No. F-273 (2010). TLC of camylofin dihydrochloride on silica gel with toluene – methanol – chloroform – 10 % ammonia 8:5:6:1. The hRf value was 35. The sample was subjected to different stress conditions (acid, base, oxidative, thermal, photolysis). The proposed method could effectively separate the drug from its degradation product.

Chinese J. of Pharm. Anal. 29 (9), 1458-1461 (2009). TLC of Ershiwuwei Luronghao pill extracts on silica gel with toluene - ethyl acetate - water - formic acid 20:10:1:1. Detection under UV 365 nm. Identification of aristolochic acid A by comparison of the hRf value with the standard. The method was rapid and precise and suitable for the quality control of the medicine.

J. Planar Chromatogr. 26, 132-136 (2013). TLC of rosmarinic (1) and caffeic acids (2) in extracts of Salvia species on silica gel with toluene - ethyl acetate - formic acid 5:4:1. Quantitative determination by absorbance measurement at 325 nm. The hRf values for (1) and (2) were 40 and 60, respectively.

J. Planar Chromatogr. 30, 411-417 (2017). HPTLC of paraben solutions and a complex matrix such as honey spiked with 5-hydroxymethylfurfural to study the influence of different application parameters on quantitative analysis. The investigated parameters included application geometries (spot, band and area) and their respective application modes (contact and spray-on), various dosage speeds, different band lengths, overspotted application versus application of mixture solutions as well as influence of the dosing volume on the result. These parameters have influence on method development and validation results.