Simultaneous quantitative determination of olmesartan and hydrochlorothiazide in human plasma and urine by liquid chromatography coupled to tandem mass spectrometry.
A specific, sensitive and rapid method based on high performance liquid chromatography coupled to tandem mass spectrometry (HPLC-MS/MS) was developed for the simultaneous determination of olmesartan (OLM) and hydrochlorothiazide (HCTZ) in human plasma and urine. Solid-phase extraction (SPE) was used to isolate the analytes from biological matrices followed by injection of the extracts onto a C(18) column with isocratic elution. Detection was carried out on a triple quadrupole tandem mass spectrometer in multiple reaction monitoring (MRM) mode using negative electrospray ionization (ESI). The method was validated over the concentration range of 1.00-1000 ng/mL and 5.00-5000 ng/mL for OLM in human plasma and urine as well as 0.500-200 ng/mL and 25.0-25,000 ng/mL for HCTZ in human plasma and urine, respectively. Inter- and intra-run precision of OLM and HCTZ were less than 15% and the accuracy was within 85-115% for both plasma and urine. The average extraction recoveries were 96.6% and 92.7% for OLM, and 87.2% and 72.1% for HCTZ in human plasma and urine, respectively. The linearity, recovery, matrix effect and stability were validated for OLM/HCTZ in human plasma and urine.
Clinical Pharmacology Research Center, Peking Union Medical College Hospital and Chinese Academy of Medical Sciences, Beijing 100032, China.
Dongyang
D
Liu
Ji
J
Jiang
Peng
P
Wang
Sheng
S
Feng
Pei
P
Hu
D000959:Antihypertensive Agents / Q000097:blood* / Q000652:urine*; D002853:Chromatography, Liquid / Q000379:methods*; D006801:Humans; D006852:Hydrochlorothiazide / Q000097:blood* / Q000652:urine*; D007093:Imidazoles / Q000097:blood* / Q000652:urine*; D053719:Tandem Mass Spectrometry / Q000379:methods*; D013777:Tetrazoles / Q000097:blood* / Q000652:urine*
D000959:Antihypertensive Agents; D007093:Imidazoles; D013777:Tetrazoles; D006852:Hydrochlorothiazide; C437965:olmesartan