scholarly journals Pseudo-stir bar hollow fiber solid/liquid phase microextraction combined with anodic stripping voltammetry for determination of lead and cadmium in water samples

2014 ◽  
Vol 5 (6) ◽  
pp. 685-693 ◽  
Author(s):  
Zarrin Es’haghi ◽  
Hasan Ali Hoseini ◽  
Saeed Mohammadi-Nokhandani ◽  
Javad Ebrahimi
Keyword(s):  
Liquid Phase ◽  
Hollow Fiber ◽  
Water Samples ◽  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Liquid Phase Microextraction ◽  
Lead And Cadmium ◽  
Anodic Stripping ◽  
Solid Liquid

scholarly journals Pre-concentration and determination of zinc in water samples by ligand assisted pseudo stirbar hollow fiber solid/liquid phase microextraction

2017 ◽  
Vol 10 ◽  
pp. S3840-S3847 ◽  
Author(s):  
Zarrin Es’haghi ◽  
Azizollah Nezhadali ◽  
Hasan Ali Hosseini ◽  
Saeed Mohammadi-Nokhandani
Keyword(s):  
Liquid Phase ◽  
Hollow Fiber ◽  
Water Samples ◽  
Liquid Phase Microextraction ◽  
Solid Liquid

Multi-walled Carbon Nanotubes Reinforced into Hollow Fiber by Chitosan Sol-gel for Solid/Liquid Phase Microextraction of NSAIDs from Urine Prior to HPLC-DAD Analysis

2019 ◽  
Vol 20 (5) ◽  
pp. 390-400 ◽  
Author(s):  
Nabil N. AL-Hashimi ◽  
Amjad H. El-Sheikh ◽  
Rania F. Qawariq ◽  
Majed H. Shtaiwi ◽  
Rowan AlEjielat
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Phase ◽  
Hollow Fiber ◽  
Sol Gel ◽  
Liquid Phase Microextraction ◽  
Extraction Device ◽  
Multi Walled Carbon Nanotubes ◽  
Solid Liquid ◽  
Walled Carbon Nanotubes

Background: The efficient analytical method for the analysis of nonsteroidal antiinflammatory drugs (NSAIDs) in a biological fluid is important for determining the toxicological aspects of such long-term used therapies. Methods: In the present work, multi-walled carbon nanotubes reinforced into a hollow fiber by chitosan sol-gel assisted-solid/ liquid phase microextraction (MWCNTs-HF-CA-SPME) method followed by the high-performance liquid chromatography-diode array detection (HPLC–DAD) was developed for the determination of three NSAIDs, ketoprofen, diclofenac, and ibuprofen in human urine samples. MWCNTs with various dimensions were characterized by various analytical techniques. The extraction device was prepared by immobilizing the MWCNTs in the pores of 2.5 cm microtube via chitosan sol-gel assisted technology while the lumen of the microtube was filled with few microliters of 1-octanol with two ends sealed. The extraction device was operated by direct immersion in the sample solution. Results: The main factors influencing the extraction efficiency of the selected NSAIDs have been examined. The method showed good linearity R2 ≥ 0.997 with RSDs from 1.1 to 12.3%. The limits of detection (LODs) were 2.633, 2.035 and 2.386 µg L-1, for ketoprofen, diclofenac, and ibuprofen, respectively. The developed method demonstrated a satisfactory result for the determination of selected drugs in patient urine samples and comparable results against reference methods. Conclusion: The method is simple, sensitive and can be considered as an alternative for clinical laboratory analysis of selected drugs.

Determination of Organochlorine Pesticides in Water Samples through Hollow Fiber Membrane-Liquid Phase Microextraction Using Ionic Liquid Material as Extractant

2013 ◽  
Vol 675 ◽  
pp. 260-263 ◽  
Author(s):  
Du Shu Huang ◽  
Ya Shun Chen ◽  
He Ping Yan ◽  
Na Wu ◽  
Wei Liu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Phase ◽  
Organochlorine Pesticides ◽  
Hollow Fiber ◽  
Water Samples ◽  
Hollow Fiber Membrane ◽  
Fiber Membrane ◽  
Liquid Phase Microextraction ◽  
Liquid Material

A novel method for determination of organochlorine pesticides residuals (2,4-DDT and 4,4-DDT) in water samples through hollow fiber membrane-liquid phase microextraction using ionic liquid material as extractant coupled with high performance liquid chromatography has been developed. The effect of extraction parameters including pH of the feed solution, stirring rate and extraction time was investigated. The proposed method provided enrichment efficiency of 323 and 289 for 2,4-DDT and 4,4-DDT respectively. The method had good linear range of 0.5-50 μg /L and the limits of detection of the pesticides were 0.1 μg /L.

Determination of Lead and Cadmium in Foods by Anodic Stripping Voltammetry: I. Development of Method

1982 ◽  
Vol 65 (4) ◽  
pp. 970-977
Author(s):  
Raymond J Gajan ◽  
Stephen G Capar ◽  
Cheryl A Subjoc ◽  
Marion Sanders
Keyword(s):  
Anodic Stripping Voltammetry ◽  
Stripping Voltammetry ◽  
Food Samples ◽  
Food Sample ◽  
Sample Solution ◽  
Lead And Cadmium ◽  
Anodic Stripping ◽  
Acetate Electrolyte

Abstract Food samples are dry ashed at 500 ± 50°C with a 10% aqueous K2SO4 solution used as an ashing aid. The ashed sample is dissolved in 50 mL 2% HNO3. Anodic stripping voltammetry is used to determine lead and cadmium in a mixture of the sample solution and an acetate electrolyte at pH 4.3 ± 0.3. The estimated quantitation limits, based on a 10 g food sample, are 0.005 ppm for cadmium and 0.010 ppm for lead.

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