Chemosphere. 90, 2157-2171 (2013). HPTLC of glycerophospholipids in liver and brain of male Atlantic cod (Gadus morhua) on silica gel (washed with methyl acetate - isopropanol - chloroform - methanol - 0.25 % KCl 25:25:25:10:9 and activated at 120 ºC for 30 min) with hexane - diethylether - acetic acid 40:10:1. Detection by spraying with 0.1 % dichlorofluorescin in 98 % methanol and 0.001 % 3,5-di-tert-4butylhydroxytoluene (BHT). Lipid classes were futher analyzed by gas chromatography with a flame ionization detector. 

Sci. Agropecu. 12, 161-168 (2021). HPTLC of annonacin in the leaves of soursop (Annona muricata) and microencapsulated extract on silica gel with chloroform - cyclohexane - diethylamine 2:1:1. Quantitative determination by absorbance measurement at 210 nm. 

Anal. Bioanal. Chem. 413, 1941-1954 (2021). HPTLC of sulfoquinovosylmonoacylglycerol (1) and sulfoquinovosyldiacylglycerol (2) in a cyanobacterium (Arthrospira sp.), a microalgae preparation (Chlorella vulgaris) and selected leafy vegetables (spinach, basil) on silica gel with chloroform - methanol - acetic acid - water 425:75:50:18. Detection by dipping into  5 % copper sulfate in 8 % phosphoric acid, followed by heating at 160 ºC for 30 min.

Anal. Bioanal. Chem. 410, 5641-5661 (2018). HPTLC of eight Sudan dyes, i.e., Sudan I (1), Sudan II (2), Sudan (3), Sudan IV (4), Sudan Red B (5), Sudan Red 7B (6), Sudan Orange G (7), and Para Red (8) in chili powder, paprika powder, curcuma powder, chili sauce, curry paste, palm oil on caffeine-impregnated silica gel with isohexane - ethyl methyl ketone 5:1. Densitometric evaluation in absorption mode at 390, 415, 500, 525, and 550 nm. Zones of interest were eluted with the oval elution head of the TLC-MS interface for further mass spectrometry analysis. The hRF values for (1) to (8) were 44, 48, 29, 33, 33, 38, 22 and 20, respectively. The LOD and LOQ were 2 and 9 ng/zone for (1) to (8), respectively. Recovery was between 73 and 120 %.

Anal. Bioanal. Chem. 412, 6431-6448 (2020). Hydrophilic interaction high-performance
thin-layer chromatography (HI-HPTLC) of Stevia leaf extracts and 20 different food products on silica gel with acetonitrile - water 4:1. Detection by spraying with 2-naphthol sulfuric acid reagent (2 g in 180 mL ethanol plus dropwise 8 mL 50 % sulfuric acid) followed by heating at 160 ºC for 2 min, primuline reagent (0.1 g in 40 mL water plus 160 mL acetone), followed by documentation at 366 nm or anisaldehyde sulfuric acid reagent (1 mL 4-methoxybenzaldehyde, 8 mL sulfuric acid, 16 mL glacial acetic acid and 140 mL methanol), followed by heating at 110 ºC for 5 min. Quantitative determination by absorbance measurement at 500 nm after derivatization with the 2-naphthol sulfuric acid reagent and at 366/> 400 nm after derivatization with primuline reagent. Full scan mass spectra (m/z 100–1500) were recorded via heated electrospray ionization (HESI) in the positive and negative ionization mode. Bioprofiling and effect-directed detections were performed using a Gram-negative A. fischeri bioassay, Gram-positive B. subtilis bioassay, β-glucuronidase assay, tyrosinase assay, α-glucosidase assay, AChE assay and DPPH assay. 

Anal. Bioanal. Chem. 411, 6655-6665 (2019). HPTLC of lovastatin present in lactone (1) and hydroxy acid forms (2) and mycotoxin citrinin (3) in red yeast rice on silica gel with n-hexane - acetone - 10 % acetic acid 60:40:1. Quantitative determination by absorbance measurement at 238 nm for (1) and (2) and fluorescence measurement at 313/> 400 nm for (3). The hRF values for (1) to (3) were 35, 23 and 7, respectively. Linearity was between 50 and 500 ng/zone for (1) and (2) and 5 and 50 ng/zone for (3). Intermediate precision was below 2 % (n=5). The LOD and LOQ were 10 and 50 ng/zone for (1) and (2) and 1 and 4 ng/zone for (3). Average recovery was 109.9 % for (1) to (3).

Anal. Bioanal. Chem. 411, 1181-1192 (2019). HPTLC of cholesterol in fresh egg yolk on silica gel with n-hexane - ethyl acetate - acetic acid 15:9:1. Detection by dipping into p-anisaldehyde sulfuric acid reagent solution for 1 s (1 mL p-anisaldehyde with a refrigerated solution of glacial acetic acid/concentrated sulfuric acid in methanol in a ratio of 1:2:100). Quantitative determination by absorbance measurement at 525 nm. Evaluation under daylight and UV light. The method allowed to study cholesterol-lowering properties of 12 lactic acid bacteria (LAB) in the absence or presence of 0.3 % bile salts. The hRF value for cholesterol was 71. Linearity was between 1 and 10 μg. Intermediate precision was below 7 % (n=3). The LOD and LOQ for cholesterol were 0.2 and 0.8 μg, respectively. Recovery was between 96.6 and 100.1 %. 

Anal. Bioanal. Chem. 412, 6789-3809 (2020). HPTLC of Ginkgo biloba extracts on silica gel with ethyl acetate - acetic acid - formic acid - water 100:11:11:26 (1) or toluene - ethyl acetate - formic acid 7:3:1 (2). Detection under UV light at 366 nm or by spraying with  natural product reagent (NPR) and polyethylene glycol (PEG). The method allowed to distinguish between characteristic and uncharacteristic unfinished product samples based on the presence or absence of bands corresponding to caffeic acid, rutin, hyperoside, chlorogenic acid, and genistein standards.