Applications of capillary electrophoresis in the fields of environmental, pharmaceutical, clinical, and food analysis (2019–2021)

This review gives a wide overview of recent advances and applications of capillary electrophoresis and microchip capillary electrophoresis methods in the fields of proteomics and peptidomics in the period from mid‐2018 up to the end of 2022. The methodological topics covering sample preparation and concentration techniques, hyphenation of capillary electrophoresis methods with mass spectrometry, and multidimensional separations by on‐line or off‐line coupled different capillary electrophoresis and liquid chromatography techniques are described and new developments in both bottom‐up and top‐down approaches in proteomics are presented. In addition, various applications of capillary electrophoresis methods in proteomic and peptidomic studies are demonstrated. They include monitoring of protein posttranslational modifications and applications in biological and biochemical research, clinical peptidomics and proteomics, and food analysis.

Section: Introductionmentioning

confidence: 99%

Recent developments and applications of capillary and microchip electrophoresis in proteomics and peptidomics (mid‐2018–2022)

Štěpánová

Kašička

2023

“…CE has been applied in vast areas such as life sciences, food, agriculture industry, and biomedical science but has some limitations as in bare fused silica capillary, separation is only based on differences in electrophoretic mobilities of charged molecules and particles [1][2][3]. Hence, the combination of CE and HPLC, known as CEC, has attracted considerable interest.…”

Section: Introductionmentioning

confidence: 99%

Preparation of open tubular capillary column covalently coated with polystyrene sulfonate with 4,4′‐Azobis(4‐cyanopentanoyl chloride) as polymerization initiator for electrochromatographic separation of alkaloids, sulfonamides, and peptides

Naithani

Cheddah

Yang

et al. 2023

An open tubular capillary electrochromatography column covalently bonded with polystyrene sulfonate was prepared via in situ polymerization using functionalized Azo-initiator 4,4′-Azobis(4-cyanopentanoyl chloride). Scanning electron, fluorescence, and atomic force microscopy techniques showed the formation of a relatively rough layer of polymer. In addition, -CN and C = O stretching vibrations from infrared spectroscopy proved the successful immobilization of the azo-initiator through covalent bonding and X-ray photoelectron spectroscopy confirmed the elemental composition of the formed polymer layer. The prepared column was found to be appropriate for small and medium-sized molecules separation. Compared to bare fused silica capillary column higher selectivity and resolution were obtained for the separation of alkaloids, sulfonamides, and peptides as a result of the electrostatic and pi-pi stacking interactions between the small organic molecules and the coated column without compromising the electroosmotic flow mobility. Separation efficiency was also increased compared to the bare capillary for the separation of alkaloids (about 1.5 times). Moreover, intraday, inter-day, intra-batch, and inter-batch relative standard deviation values of retention time and peak area of peptides were within 2% and 10%, respectively, indicating good repeatability of the column preparation procedure. The developed method for the covalent bonding of polymers through a functionalized azo-initiator could represent a promising stable method for the preparation of an open tubular column.

“…As a rapidly developing analytical technique, CE has been widely used in the field of pharmaceutical analysis because of its low samples and organic reagents consumption, high efficiency and sensitivity, simple equipment, and wide applicability [20][21][22][23]. Therein, MEKC is usually used as a common mode because of its good characteristic of separation.…”

Section: Introductionmentioning

confidence: 99%

In‐capillary screening and quantifying the antioxidants of Yangxinshi Tablet using field‐enhanced sample injection‐micellar electrokinetic chromatography

Zhou

Wang

Liu

et al. 2023

Award Number: 21ZYJDJC00080An in-capillary 2,2′-azinobis-(3-ethylbenzthiazoline-6-sulphonate) as oxyradicals combining field-enhanced sample injection with micellar electrokinetic chromatography was developed for screening and determination of the major antioxidants in Yangxinshi Tablet. To obtain simultaneous separation and detection of radicals and analytes, relevant factors were optimized separately. Under the optimum conditions, four compounds including salvianolic acid B, hyperoside, puerarin, and caffeic acid were identified as the major antioxidants. All validation results covering recovery, precision, and stability demonstrated good applicability of the method. On this basis, the total antioxidant activity was successfully evaluated in terms of the decreased peak area of radicals. There was a correlation coefficient of 0.8974 between the total contents of major antioxidants and the total antioxidative activity of the sample. Therefore, these four compounds were selected as combinatorial markers for the quality evaluation of Yangxinshi Tablet. It was concluded that the established method presented a powerful potential to screen and quantify active ingredients in the complex preparation of Chinese medicine.