Thin-layer chromatographic plates with monolithic layer of silica: Production, physical-chemical characteristics, separation capabilities

被引:17
作者
Frolova, Anastasiya M. [1 ]
Konovalova, Olga Y. [1 ]
Loginova, Lidia P. [1 ]
Bulgakova, Alena V. [1 ]
Boichenko, Alexander P. [1 ]
机构
[1] Kharkiv VN Karazin Natl Univ, Dept Chem Metrol, UA-61077 Kharkov, Ukraine
关键词
Monolith; Silica; Sol-gel synthesis; Thin-layer chromatography; STATIONARY PHASES; MALACHITE GREEN; MASS-SPECTROMETRY; AQUEOUS-SOLUTION; PERFORMANCE; ADSORPTION; GEL; PAPER; SORPTION; COLUMNS;
D O I
10.1002/jssc.201100178
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The technique for production of thin-layer chromatographic plates with fixed monolithic layer of sorbent was developed on the basis of investigation of factors affecting sorption capacity, sorption kinetics and mechanical stability of monoliths. The optimal reaction mixture for sol gel synthesis of monoliths consisted of tetraethoxysilane, buffer solution with pH 7.4, N,N-dimethylformamide, ethanol, polyethyleneglycol with molecular weight 1000 and cetylpyridinium chloride in molar ratio 1.0:4.6:1.4:7.6:0.26:8 x 10(-3). On the basis of analysis of sorption kinetics of malachite green on the monoliths it was concluded that mechanism of sorption includes chemisorption. The optimized conditions for fixing the monolithic layer on the carrier and its drying allow obtaining undisturbed monolithic layer, which was used for test mixtures separation. The increase of monolithic layer thickness in comparison with ultrathin-layer chromatographic plates allows detecting visually at reasonable concentrations and loaded sample volumes the spots of food and synthetic dyes.
引用
收藏
页码:2352 / 2361
页数:10
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