Separation and on-line concentration of bisphenol A and alkylphenols by micellar electrokinetic chromatography with anionic surfactant

Off-Line Concentration of Bisphenol A and Three Alkylphenols by SPE then On-Line Concentration and Rapid Separation by Reverse-Migration Micellar Electrokinetic Chromatography

“…The separation time obtained was similar to that in Ref. [13]. Although limits of detection obtained were slightly higher, injection time in SRW was much shorter (total 240 s) than in Ref.…”

“…Capillary electrophoresis (CE) is usually described as a complementary technique to HPLC. Micellar electrokinetic chromatography (MEKC) has most often been used for these compounds because they are hydrophobic and neutral [11][12][13][14]. When tetradecyltrimethylammonium bromide (TTAB) was used as micelle and a sweeping technique was used for on-line concentration, the effective sensitivity enhancement for the compounds was more than fiftyfold.…”

“…On-line concentration was, however, performed by gravity injection. The injection time was too long (2400 s) and 4-NP could not be detected because its peak shape was broadened [13]. When sodium dodecyl sulfate (SDS) was used as micelle all the compounds could be detected, and a lower limit of detection was obtained, but the long injection process (20 min) meant the method lost the advantage of rapid CE separation [13].…”

“…The injection time was too long (2400 s) and 4-NP could not be detected because its peak shape was broadened [13]. When sodium dodecyl sulfate (SDS) was used as micelle all the compounds could be detected, and a lower limit of detection was obtained, but the long injection process (20 min) meant the method lost the advantage of rapid CE separation [13]. Reverse-migration micellar electrokinetic chromatography (RM-MEKC) is useful for rapid separation of some hydrophobic endocrine disruptors in much shorter analysis times than conventional MEKC [15][16][17][18].…”

Determination of trichlorfon residues in vegetables using a quantum dot-labeled biomimetic immunoassay method followed by capillary electrophoresis

“…Therefore, it is a better choice to make QDs as markers instead of enzymes for immunoassays. Furthermore, CE has proven to be an attractive analysis technique for various applications because of its major advantages including high efficiency and resolution in addition to low consumption of reagents and solvents (Gallartayala, Núñez, Moyano, & Galceran, 2010;Takeda et al, 2003;Zhao et al, 2014). Therefore, coupling CE with the biomimetic immunoassay technique can take advantage of the high separation efficiency of CE with the specificity of biomimetic immunoassay, and promote the sensitivity and accuracy of the biomimetic immunoassay (Li, Lu, Qiao, & Xu, 2016).…”