Title of article :
Rapid isolation of angiotensin peptides from plasma by electromembrane extraction
Author/Authors :
Balchen، نويسنده , , Marte and Halvorsen، نويسنده , , Trine Grّnhaug and Reubsaet، نويسنده , , Léon and Pedersen-Bjergaard، نويسنده , , Stig، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
Pages :
6
From page :
6900
To page :
6905
Abstract :
The present study has for the first time demonstrated the isolation of peptides from human plasma by electromembrane extraction (EME). Angiotensin 1, angiotensin 2, and angiotensin 3 migrated from 500 μL of diluted plasma, through a thin layer of 1-octanol and 8% di-(2-ethylhexyl) phosphate immobilized as a supported liquid membrane (SLM) in the pores of a porous hollow fiber, and into a 25 μL aqueous acceptor solution present inside the lumen of the fiber. The driving force for the extraction was a 15 V potential difference applied across the SLM. After only 10 min of EME, the peptides were isolated from diluted plasma (pH 3) with extraction recoveries between 25 and 43%. After optimization, the extraction system was evaluated using spiked plasma samples of angiotensin 2. The evaluation was performed by liquid chromatography electrospray mass spectrometry, showing linearity of angiotensin 2 in the range 2.5–125.0 ng/mL (r2 = 0.989), and repeatability (RSD) between 5.6 and 11.6% (n = 6). The results demonstrate the possibility of isolating angiotensin peptides from plasma in only 10 min, using electromembrane extraction. The experimental findings are therefore promising with regard to future peptide extractions.
Keywords :
Angiotensins , Sample preparation , biological samples , Electromembrane extraction , Supported liquid membranes
Journal title :
Journal of Chromatography A
Serial Year :
2009
Journal title :
Journal of Chromatography A
Record number :
1512371
Link To Document :
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