Application of extraction disks in dissolution tests of clenbuterol and levothyroxine tablets by capillary electrophoresis

Electrostacking online sample pre‐concentration capillary electrophoresis with amperometric detection for β2‐agonists in human urine

“…However, high buffer concentrations would result in high Joule heating and long analysis time. Thus, the effect of concentration of the running solution on the separation was studied by using 10 The effect of separation voltage was also investigated. When the separation voltage was 9 kV, good peak shape and sensitivity of analytes could be achieved.…”

“…The separation and determination of b 2 -agonists by CE with UV detection have been described by Carducci et al, [10]. However, because of its small injection sample volume and short optical path-length, the low concentra-tion sensitivity of UV detection is always annoying.…”

Separation and Determination of Clenbuterol, Cimaterol and Salbutamol by Capillary Electrophoresis with Amperometric Detection

“…Before the experiment, the capillary was inserted from the entrance of capillary (9) which penetrated through the waterproof rubber (7) and then protruded from the direction pipe of capillary (380 mm i.d) (5) about 2 mm. Because the direction pipe of the working electrode (0.302 cm i.d) (3) and direction pipe of the capillary (5) are in the same axis, the carbon disk working electrode (10) can be at the end of capillary automatically when it enter the reservoir via the direction pipe of working electrode (3). Before separation, the working electrode (10) was inserted just to face the end of capillary which make a natural gap (about 10 mm) between them.…”

“…The schematic diagram of the capillary electrophoresis system with amperometric detection is shown in Figure 2. The system is composed mainly of running buffer reservoir (1), high-voltage supplier (3, Shanghai Institude of Atomic Nuclear Science Research, Chinese Academy of Science), auto-aimed electrochemical cell (4), amperometric detector (8, LC-4C potentiostat, Bioanalytical System, West Lafayette, IN, USA), chromatogram workstation (9, Model HW-2000, Qianpu Software Company, Shanghai, China) and personal computer (10). Among them, auto-aimed electrochemical cell (4) designed by ourselves has a special function to aim capillary at working electrode automatically and it will be introduced later.…”

Competitive immunoassay for clenbuterol using capillary electrophoresis with laser-induced fluorescence detection

“…In recent years, some methods have already been developed to detect CLB in the urine, eye and liver, including liquid chromatography-mass spectrometry (LC-MS) [6][7][8], gas chromatography-mass spectrometry (GC-MS) [9,10], and capillary electrophoresis (CE) [11][12][13]. However, the abovementioned methods are carried out with tedious processes, even worse, they cost a great deal of expensive, toxic and environmental unfriendly organic agents.…”