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Journal of Biomedicine and Biotechnology
Volume 2011, Article ID 917232, 7 pages
http://dx.doi.org/10.1155/2011/917232
Research Article

Simultaneous Identification and Quantification of Canrenone and 11-α-Hydroxy-Canrenone by LC-MS and HPLC-UVD

1School of Food and Biological Engineering, Jiangsu University, 301# Xuefu Road, Zhenjiang 212013, China
2PARCHN Sodium Isovitamin C Co., Ltd, Xingangshan Town, Dexing 334221, China
3Department of Respiratory Disease, Changzheng Hospital, Second Military Medical University, 415 Fengyang Road, Shanghai 200003, China

Received 24 August 2011; Accepted 20 September 2011

Academic Editor: Dobromir Dobrev

Copyright © 2011 Da-Ming Huang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A procedure for simultaneous identification and quantification of canrenone and its biotransformed product 11-α-hydroxy-canrenone by high-performance liquid chromatography with ultraviolet detector (HPLC-UVD) and mass spectrometry (LC-MS) methods was proposed. The optimal determination variables on the HPLC-UVD or LC-MS coupled with a ZORBAX Eclipse XDB-C18 column (150 mm × 4.6 mm, 5 μm) were set as follows: detection wavelength of 280 nm, mobile phase of water and methanol gradient elution, temperature for the chromatographic column of 30°C, flow rate of mobile phase of 0.8 mL/min, sample injection volume of 5 μL, and elution time of 40 min. The MS conditions were set as follows: the flow rate of sheath gas, aux gas, and sweep gas were kept at 35 arb, 5 arb, and 0 arb, respectively. The temperature of capillary was held at 300°C, and capillary voltage was set at 30.00 V. Tube lens were performed at 100.00 V. The proposed method was validated by linearity ( 𝑟 2 ≥ 0.9910), average recovery (94.93%, RSD1.21%), precision (RSD ≤ 1.31%), limit of detection, and limit of quantification (LOD 0.1~0.12 mg/L, LOQ 0.5~0.67 mg/L), which proved to be affordable for simultaneously determining canrenone and its bio-transformed product 11-α-hydroxy-canrenone.