High enrichment and ultra-trace analysis of aflatoxins in edible oils by a modified hollow-fiber liquid-phase microextraction technique

2017 ◽  
Vol 53 (64) ◽  
pp. 8988-8991 ◽  
Author(s):  
Siming Huang ◽  
Xiao Chen ◽  
Ying Wang ◽  
Fang Zhu ◽  
Ruifen Jiang ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Hollow Fiber ◽  
Trace Analysis ◽  
Edible Oils ◽  
Liquid Phase Microextraction ◽  
Good Potential ◽  
High Enrichment ◽  
Ultra Trace ◽  
Ultra Trace Analysis

An improved hollow-fiber liquid-phase microextraction approach with excellent purification and enrichment capabilities enabled the method have good potential for future ultra-trace analysis of AFTs.

Ultrasound-assisted hollow fiber/ionic liquid-based liquid phase microextraction using an ionic liquid solvent for preconcentration of cobalt and nickel ions in urine samples prior to FAAS determination

2016 ◽  
Vol 31 (11) ◽  
pp. 2338-2345 ◽  
Author(s):  
Keng-Chang Hsu ◽  
Cheng-Fa Lee ◽  
Yu-Ying Chao ◽  
Chih-Chang Hung ◽  
Po-Chih Chen ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Phase ◽  
Hollow Fiber ◽  
Human Urine ◽  
Urine Samples ◽  
Liquid Phase Microextraction ◽  
Nickel Ions ◽  
Ultrasound Assisted ◽  
Ultra Trace ◽  
Cobalt And Nickel

Ultrasound-assisted hollow fiber liquid-phase microextraction coupled with FAAS has been developed to preconcentrate and determine ultra-trace amounts of Co and Ni ions in human urine.

scholarly journals Development of Hollow-Fiber Liquid-Phase Microextraction Method for Determination of Urinary trans, trans-Muconic Acid as a Biomarker of Benzene Exposure

2016 ◽  
Vol 11 ◽  
pp. ACI.S40177 ◽  
Author(s):  
Farhad Ghamari ◽  
Abdulrahman Bahrami ◽  
Yadollah Yamini ◽  
Farshid Ghorbani Shahna ◽  
Abbas Moghimbeigi
Keyword(s):  
Liquid Phase ◽  
Hollow Fiber ◽  
High Performance ◽  
Urine Samples ◽  
Trioctylphosphine Oxide ◽  
Muconic Acid ◽  
Liquid Phase Microextraction ◽  
High Enrichment ◽  
Optimized Conditions ◽  
First Time

For the first time, hollow-fiber liquid-phase microextraction combined with high-performance liquid chromatography-ultraviolet was used to extract trans, trans-muconic acid, in urine samples of workers who had been exposed to benzene. The parameters affecting the metabolite extraction were optimized as follows: the volume of sample solution was 11 mL with pH 2, liquid membrane containing dihexyl ether as the supporter, 15% (w/v) of trioctylphosphine oxide as the carrier, the time of extraction was 120 minutes, and stirring rate was 500 rpm. Organic phase impregnated in the pores of a hollow fiber was extracted into 24 μL solution of 0.05 mol L−1 Na2CO3 located inside the lumen of the fiber. Under optimized conditions, a high enrichment factor of 153-182 folds, relative recovery of 83%-92%, and detection limit of 0.001 μg mL−1 were obtained. The method was successfully applied to the analysis of ttMA in real urine samples.

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