Optimized Vortex-Assisted Dispersive Liquid–Liquid Microextraction Coupled with Spectrofluorimetry for Determination of Aspirin in Human Urine: Response Surface Methodology

Author(s): Zahra Tamiji, Maryam Salahinejad*, Ali Niazi

Journal Name: Current Pharmaceutical Analysis

Volume 16 , Issue 2 , 2020

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Graphical Abstract:


Background: A Vortex-assisted dispersive liquid-liquid microextraction (VA-DLLME) method is presented for the determination of aspirin (acetylsalicylic acid) in human urine by spectrofluorimetry.

Objective: To determine trace levels of aspirin in biologic samples by using green and low-cost method development.

Methods: For the microextraction procedure, chloroform and acetonitrile were used as extraction and disperser solvent, respectively. The factors affecting the efficiency of extraction such as volume of chloroform, volumes of acetonitrile, ionic strength, sample pH, centrifuging time, and extraction time were investigated. Then significant variables were optimized by the response surface method using the Box- Behnken design.

Results: Under the optimum extraction conditions, a linear calibration curve in the range of 0.1 to 130 ng mL-1 with a correlation coefficient of R2 = 0.998 was obtained. The limits of detection (LOD) and limits of quantification (LOQ) were 0.031 and 0.103 ng mL-1, respectively. The relative standard deviations (RSD) were less than 4%.

Conclusion: Enrichment factor and recoveries were achieved for the extraction of aspirin in human urine. This method gives a rapid, simple, sensitive and environmentally friendly for the measurement of trace amount aspirin.

Keywords: Dispersive liquid-liquid microextraction, aspirin, box behnken design, response surface methodology, optimization, spectrofluorimetry.

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Year: 2020
Published on: 23 January, 2020
Page: [201 - 209]
Pages: 9
DOI: 10.2174/1573412914666181031115209
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