Comparison of dispersive liquid–liquid microextraction and the modified QuEChERS method for the determination of fipronil in honey by high performance liquid chromatography with diode-array detection

2011 ◽  
Vol 3 (8) ◽  
pp. 1893 ◽  
Author(s):  
Débora Tomasini ◽  
Maicon R. F. Sampaio ◽  
Liziane V. Cardoso ◽  
Sergiane S. Caldas ◽  
Ednei G. Primel
Keyword(s):  
High Performance Liquid Chromatography ◽  
High Performance ◽  
Diode Array ◽  
Diode Array Detection ◽  
Quechers Method ◽  
Modified Quechers ◽  
Array Detection ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

scholarly journals Determination of fomesafen and quizalofop-p-ethyl in beans using modified QuEChERS-HPLC-DAD

2020 ◽  
Vol 12 (3) ◽  
pp. 35-45
Author(s):  
Huacheng Tang ◽  
Jiangling Qu ◽  
Dongmei Cao ◽  
Weisong Wang ◽  
Yuhao Lou
Keyword(s):  
Mobile Phase ◽  
High Performance ◽  
Diode Array ◽  
Diode Array Detection ◽  
Quechers Method ◽  
Modified Quechers ◽  
Relative Standard ◽  
Array Detection ◽  
Extraction Agent

An improved quick, easy, cheap, effective, rugged, and safe (QuEChERS) method combined with high-performance liquid chromatography (HPLC) coupled to diode array detection was established for the determination of fomesafen and quizalofop-p-ethyl in beans. It is simple and efficient and can be used in most laboratories. This method optimizes four chromatographic conditions, namely, mobile phase, mobile phase ratio, flow rate, and detection wavelength. The effects of extraction agent, extraction dose, extraction time, NaCl amount, and adsorbent on the pretreatment effect were studied. The recoveries were high (92.4–117.8%), and repeatability was good (relative standard deviation [RSD] ranged from 0.35 to 4.36%). The standard solutions ranged from 0.1 to 25 ?g/mL. The detection limits of fomesafen and quizalofop-p-ethyl were 0.005 and 0.003 mg/kg, respectively.

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