Microbiol. Res. 194, 1-9 (2017). TLC of lipopeptide biosurfactant produced by the marine Aneurinibacillus aneurinilyticus SBP-11 on silica gel with 96 % ethanol – water 7:3 for peptides, chloroform – acetic acid – water 6:3:1 for sugars and chloroform – methanol – water 65:25:4 for lipids. Detection by spraying with ninhydrin reagent for peptides, anthrone reagent for sugars and rhodamine B reagent for lipids. The hRF values for peptides and lipids were 73 and 45, respectively.

II. Quantitative determination of surfactant components in chromatography.) (Japanese). Japanese Oil Chem. (Yukagaku) 39, 340-345 (1990). Two-dimensional TLC of surfactant components in detergents on silica with ethyl acetate for the 1st direction and chloroform for the 2nd. Detection by charring. Quantification by densitometry. R.S.D. 1.4 - 2.0%. Comparison of the TLC method with extraction/optical density method.

J. Chromatogr. A 791, 245-253 (1997). Determination of single polymer species of non-ionic detergents of the polyoxyethylene type by MALDI-MS. Separation of single polymer species by TLC on silica gel with ethyl acetate - isooctane - acetic acid - water 13:2:3:10, and RPC methods as verified by MALDI-MS. Comparison of the methods.

(Comparative evaluation of analytical methods for the determination of preservatives. The determination of methyl-p-hydroxy-benzoate in the preparates of the pharmacopoeia by quantitative thin-layer chromatography and by gas-chromatography.) A simple, relatively rapid and repeatable thin-layer densitometric (and gas-chromatographic) method has been developed for quantitative determination of methyl-p-hydroxy-benzoate content of syrups, ointments and mucilages, corresponding to the requirements of the pharmacopoeia. Sample preparation with Extrelut columns. TLC on silica with pentane - ether 7:3. Detection by UV 254 nm. Detection limit 100 ng, densitometry by absorbance at 258 nm.

J. AOAC Int. 78, 1328 - 1332 (1995). TLC of sodium salts of tripolyphosphate, pyrophosphate, phosphate dibasic, and phosphate monobasic on cellulose with isopropanol - propanol - trichloroacetic acid - NH3 - water 200:175:25:1:125. Detection by spraying with molybdenum blue spray reagent. - Exogenous polyphosphates are distinguishable from naturally occurring phosphates; TLC detection of added phosphates can be used as an inspection tool for fresh products and for frozen products stored about 1 year.

Proc. Intern. Symp. on Planar Separations, Planar Chromatography 2001, pp. 283-292. HPTLC of adenosine, cytosine, thymidine, 2'-deoxyuridine, 2'-deoxycytidine, thymine, inosine and uridine on silica gel - after prewashing with methanol - chloroform 1:1 with 1-butanol - 2-propanol - 25% NH3 - water 13:1:2:1, ethyl acetate - methanol - 25% NH3 5:2:1, and chloroform - methanol - water 830:15:3. Detection under UV at 254 nm. Quantitation by densitometry in reflectance mode at 260 nm.

J. Chromatogr. 367, 155-159 (1986). Investigation of the utility of the reaction between alkylacrylates and diazomethane. TLC of whole homologous series of C1- C18 n-alkyl-3-alkoxy-carbonyl-2-pyrazolines on silica with binary systems containing benzene and ethyl acetate. Cellulose and octadecyl-bonded silica were also employed as sorbents.

J. Planar Chromatogr. 4, 370-372 (1991). HPTLC of polidocanol (mixture of monolauryl ethers of polyethylene glycols) on silica with MEK - acetone 10:1, water saturated. Visualization by dipping the plates for one second into a solution of 2% potassium dichromate in 12% aqueous sulfuric acid. Quantification by densitometry in reflectance mode at 600 nm. CV =3.4% (n=10) and recovery rate 97.0 + 3.1% (n=8).