کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1212892 1494105 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Carrier mediated transport solvent bar microextraction for preconcentration and determination of dexamethasone sodium phosphate in biological fluids and bovine milk samples using response surface methodology
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Carrier mediated transport solvent bar microextraction for preconcentration and determination of dexamethasone sodium phosphate in biological fluids and bovine milk samples using response surface methodology
چکیده انگلیسی


• A three phase solvent bar method was developed for determination of dexamethasone.
• The effect of different experimental parameters on extraction efficiency was studied.
• The method was used for extraction of trace level dexamethasone in complex matrices.

In the current study, a fast and simple preconcentration and sample clean up procedure was developed based on carrier mediated three phase solvent bar liquid phase microextraction (TPSB-LPME) method prior to high performance liquid chromatography (HPLC) equipped with an ultraviolet (UV) absorbance detector for simultaneous extraction and determination of trace amounts of dexamethasone sodium phosphate (DSP) in human plasma, human urine and bovine milk. According to this procedure, dexamethasone sodium phosphate was extracted from an acidic aqueous sample (SP, 7.5 mL with pH = 6) into the organic solvent 1-octanol (containing 5%, w/v of Aliquat-336 as carrier) residing in the pores of a hollow fiber and then back extracted into an alkali receiving phase (RP, 5 μL of 0.65 M NaClO4 with pH = 10) was located inside the lumen of the fiber. After the extraction period, the receiving phase was directly injected into HPLC. The effect of different extraction conditions (i.e., pH of source and receiving phases, ionic strength, stirring rate, counter-ion concentration and extraction time) on the extraction efficiency of DSP was investigated and optimized using central composite design (CCD) as a powerful tool. Under the optimal conditions, preconcentration factor of 320, extraction recovery of 23%, dynamic linear range of 1–1000 ng mL−1 (r2 = 0.997) and limit of detection of 0.1 ng mL−1 were obtained. Eventually, applicability of the proposed method was successfully confirmed by extraction and determination of drug in plasma and urine samples and bovine milk with R.S.D.s < 8%. Comparing to the traditional methods, the proposed method exhibits high sensitivity and high preconcentration factors as well as good precision. The extraction setup is simple and due to active transport of analytes, high cleanup effect and good selectivity are obtained in the extraction process. This extraction technique is also the most economical sample preparation and preconcentration technique as compared to traditional extraction techniques.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography B - Volume 931, 15 July 2013, Pages 148–156
نویسندگان
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