Highly selective determination of some anti‐depressant drugs in complicated matrices by dual emulsification liquid‐phase microextraction based on filtration followed by high‐performance liquid chromatography

2019 ◽  
Vol 2 (4) ◽  
pp. 129-136
Author(s):  
Peyman Moradi ◽  
Alireza Asghari
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Liquid Phase ◽  
High Performance ◽  
Liquid Phase Microextraction ◽  
Selective Determination ◽  
Complicated Matrices

scholarly journals Hollow fiber based liquid phase microextraction with high performance liquid chromatography for the determination of trace carvedilol (β-blocker) in biological fluids

2020 ◽  
Vol 32 (2) ◽  
pp. 149-155
Author(s):  
Ahmad Makahleh ◽  
Kek Wan Cheng ◽  
Bahruddin Saad ◽  
Hassan Y. Aboul-Enein
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Liquid Phase ◽  
High Performance ◽  
Biological Fluids ◽  
Liquid Phase Microextraction ◽  
Salt Addition ◽  
Β Blocker ◽  
Donor Phase

A hollow-fiber liquid-phase microextraction (HF-LPME), followed by high-performance liquid chromatography–ultraviolet (HPLC–UV) method for the trace determination of carvedilol (β-blocker) in biological fluids, has been described. The separation was achieved using Inertsil ODS-3 C18 (250 mm × 4.6 mm, 3 μm) column with a mobile phase composition of 10 mM phosphate buffer (pH 4.0)–acetonitrile (50:50, v/v) at a flow rate of 1.0 mL/min, under isocratic elution. Several parameters (i.e., type of organic solvent, donor phase pH, concentration of acceptor phase (AP), stirring rate, extraction time, and salt addition) that affect the extraction efficiency were investigated. The optimum HF-LPME conditions were as follows: dihexyl ether as an organic solvent; donor phase pH, 10.7; 0.1 M HCl (AP); 1100-rpm stirring rate; 60-min extraction time; and no salt addition. These parameters have been confirmed using design of experiments. Under these conditions, an enrichment factor of 273-fold was achieved. Good linearity and correlation coefficient were obtained over the range 5–1000 ng/mL (r2 = 0.9994). Limits of detection and quantitation were 1.2 and 3.7 ng/mL, respectively. The relative standard deviation at 3 different concentration levels (5, 500, and 1000 ng/mL) were less than 13.2%. Recoveries for spiked urine and plasma were in the range 80.7–114%. The proposed method is simple, sensitive, and suitable for the determination of carvedilol in biological fluids.

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