title: Determination of free and total 3-methoxy-4-hydroxyphenylethylene glycol in human plasma by high-performance liquid chromatography with electrochemical detection.
abstract: A new assay method for the determination of free and total 3-methoxy-4-hydroxyphenylethylene glycol (MHPG) in human plasma is described. MHPG was purified with a Bond Elut PH column followed by ethyl acetate extraction. High-performance liquid chromatography (HPLC) with electrochemical detection was used for separation and detection of MHPG. Total MHPG was measured after enzymatic hydrolysis with sulfatase type H-5. 3-Hydroxy-4-methoxyphenylethylene glycol (iso-MHPG) was used as an internal standard to correct the recovery of extraction. One assay could be completed within 20 min with a short reverse-phase column. This technique is sensitive, reliable and less time-consuming than other HPLC methods. With this method, the plasma values of MHPG in healthy controls were in good agreement with those using gas chromatography-mass spectrometry.
mesh_terms: D000085:Acetates; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004563:Electrochemistry; D008401:Gas Chromatography-Mass Spectrometry; D006018:Glycols / Q000097:blood*; D006801:Humans; D008734:Methoxyhydroxyphenylglycol / Q000097:blood*; D012016:Reference Values; D013429:Sulfatases / Q000378:metabolism
chemical_list: D000085:Acetates; D006018:Glycols; D008734:Methoxyhydroxyphenylglycol; C007650:ethyl acetate; D013429:Sulfatases