59th Indian Pharmaceutical Congress C-17, 228 (2007). HPTLC of curcumin, charantin, and swetiamarin in polyherbal formulations on silica gel with benzene - methanol 4:1 for charantin, chloroform - methanol - formic acid 74:4:1 for curcumin, and ethyl acetate - methanol - water 77:15:5 for swetiamarin. Densitometry at 536 nm for charantin, 425 nm for curcumin, and 238 nm for swetiamarin. The hRf values were 33, 89, and 54 for charantin, curcumin, and swertiamarin respectively.

60th Indian Pharmaceutical Congress PA-82, (2008). HPTLC of wedelolactone in supercritical fluid extrats of Eclipta alba Hassk. on silica gel with toluene - ethyl acetate - formic acid 50:50:1. Densitometric evaluation at 240 nm. The method is linear in the range of 100-1000 ng/spot. The method was used for estimation of wedelolactone in the raw material obtain from different regions of the country (India).

J. Chromatogr. Sci. 48 (1), 45-48 (2010). HPTLC of ambroxol hydrochloride on silica gel with methanol - triethylamine 2:3. The hRf value of ambroxol was 53. Quantification by absorbance measurement at 254 nm. Linearity was given in the range of 100-1000 ng/spot with r2 = 0.9966 (via peak area). The limits of detection and quantitation were 10 and 30 ng/spot, respectively. Ambroxol hydrochloride was susceptible to degradation under oxidation and thermal stress conditions. The method is suitable for purity testing of the drug as it detects the related impurities.

J. Tech. & Sci. of Ningxia Agr. & Forest, 5, 38-39 (2010). For liquorice TLC on silica gel with ethyl acetate - glacial acetic acid - formic acid - water 15:1:1:2, detection by spraying with 10 % sulfuric acid in ethanol and heating at 105 ºC. For Rhizoma zingiberis TLC on silica gel with cyclohexane - diethyl ether 1:1, detection by spraying with 10% vanillin in sulfuric acid and heating at 105 ºC, followed by evaluation in daylight.

Abstracts, 42nd Middle Atlantic Regional Meeting of the American Chemical Society, College Park MD, USA, May 21-24 (2011). The four TLC methods for acetaminophen, acetylsalicylic acid, ibuprofen, and chlorpheniramine maleate contained in the Compendium of methods developed by A.S. Kenyon and T.P. Layloff at the US FDA for use in countries with limited resources were transferred to quantitative HPTLC. The used sample preparation methods provide suitable calibration curves covering the range of 70-130 % of the label value of the products. Quantitative determination by absorbance measurement at 254 nm.

J. Sep. Sci. 37, 2675-2681 (2014). HPTLC of the acidic catecholamine metabolites (1) 3,4-dihydroxymandelic acid, (2) epinephrine, (3) vanillylmandelic acid, (4) 3,4-dihydroxyphenylacetic acid and (5) homovanillic acid in human urine on RP-18 with citrate buffer (pH 3.0) - methanol - formic acid 48:2:5. Detection by spraying with 0.02 % 2,2-diphenyl-1-picrylhydrazyl radical solution in ethanol. Quantification by digital imaging processing. The hRF values of (1) to (5) were 84, 65, 59, 47 and 22, respectively. Linearity was in the range of 30-150 ng/zone for (1), (2) and (4), 90-450 ng/zone for (3) and 60-300 ng/zone for (5). The intermediate intra-day and inter-day precisions were below 3 % (n=3) for (1) to (5). The LOD and LOQ were 33 and 36 ng/zone for (1), 36 and 42 ng/zone for (2), 103 and 120 ng/zone for (3), 13 an 17 ng/zone for (4) and 45 and 54 ng/zone for (5), respectively. Recoveries for the compounds were between 94.6 and 105.7 %.

J. Chromatogr. Sci. 54 (4), 647-652 (2016). Presentation of a sensitive, accurate and selective method for the simultaneous determination of paracetamol (PAR), its toxic impurity 4-aminophenol (4-AP), pseudoephedrine HCl (PSH) and loratidine (LOR). HPTLC on silica gel with acetone – hexane – ammonia 40:50:1. Densitometric evaluation at 254 nm for PAR, 4-AP and LOR, and at 208 nm for PSH. The method was used for the determination of PAR, PSH and LOR in commercial tablets and in plasma in the ranges of 0.5–6.0 µg/zone, 1.6–12.0 µg/zone and 0.4–2.0 µg/zone for PAR, PSH and LOR, respectively. Comparison of the results obtained by the proposed method with those obtained by HPLC method showed no significance difference between both methods regarding accuracy and precision.

Chem. (FENXI HUAXUE) 12, 455-458 (1984). (Chinese). (Studies on micellar solution as mobile phase in liquid chromatography. I. Use in thin-layer chromatographic separation of drugs). TLC of 33 drugs including sulfanilamides, vitamin B, antipyretics and adrenalines on polyamide with micellar aqueous solutions (SDS). Detection by various staining reagents and by UV.