目的: 建立一种双衍生法-结合串联质谱技术同时检测人血清中18种类固醇激素的方法。方法: 血清样本采用羟胺和1,2-二甲基咪唑-5-磺酰氯对进行衍生处理,采用液相色谱-串联质谱法正离子选择离子监测模式(SRM)下检测,色谱柱为Kinetex®C8(100 mm×2.1 mm,2.6 μm),以0.1%甲酸水溶液为流动相A, 0.1%甲酸甲醇溶液为流动相B,梯度洗脱(0~0.5 min,35%B;0.5~5 min,35%B→100%B;5.0~5.1 min,100%B→35%B;5.1~7 min,35%B),柱温40 ℃,流速0.4 mL·min-1,进样量20 μL,采集时间为6 min。结果: 18种类固醇激素的线性相关系数均>0.99,回收率均在85%~115%,精密度RSD均＜15%。用该方法成功地检测了156份健康人群受试者血清样本(男性75例,女性61例)并制定了参考区间。结论: 该方法可用非固相萃取法同时检测孕烯醇酮、17-羟孕烯醇酮、孕酮、17-羟孕酮、皮质酮、皮质醇、11-脱氧皮质醇、21-脱氧皮质醇、醛固酮、睾酮、雄烯二酮、脱氢表雄酮、硫酸脱氢表雄酮、皮质素、18-羟皮质酮、雌酮、雌二醇、雌三醇等18种类固醇激素。
Objective: To establish a dual derivatization method combined with tandem mass spectrometry for the simultaneous determination of 18 different steroid hormones in human serum. Methods: Serum samples were treated with hydroxylamine and 1,2-dimethylimidazole-5-sulfonyl chloride for derivatization, and the resulting compounds were analyzed by liquid chromatography-tandem mass spectrometry in positive ion selected reaction monitoring (SRM) mode. The Kinetex®C8 column (100 mm×2.1 mm, 2.6 μm) was used for the separation. Mobile phase A (0.1% acetic acid in water) and mobile phase B (0.1% acetic acid in methanol) with gradient elution(0-0.5 min,35%B;0.5-5 min, 35%B→100%B; 5.0-5.1 min,100%B→35%B; 5.1-7 min, 35%B)at the flow rate of 0.4 mL·min-1 were applied. Column temperature was set at 40 ℃. Injection volume was 20 μL and collection time was 6 min. Results: The linearity correlation coefficients for all 18 steroid hormones were greater than 0.99, the recovery rates ranged from 85% to 115%, and the precision RSD was less than 15%. This method was successfully applied to the analysis of serum samples from 156 healthy subjects (75 males and 61 females), and reference intervals were established. Conclusion: This method can be used to simultaneously determine 18 types of steroid hormones, such as pregnenolone, 17-hydroxypregnenolone, progesterone, 17-hydroxyprogesterone, corticosterone, cortisol, 11-deoxycorticosterone, 21-deoxycorticosterone, aldosterone, testosterone, androstanedione, dehydroepiandrosterone, sulfated dehydroepiandrosterone, adrenocorticotropin, 18-hydroxicorticotropin, estrone, estradiol, and estriol using non-solid-phase extraction.
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