固相萃取-高效液相色谱法测定人体血清中游离皮质醇

Journal of Hebei University(Natural Science Edition)(2009)

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Abstract
使用C18固相萃取小柱纯化、富集人体血清中的游离皮质醇,C18反相高效液相色谱法分离,V(甲醇)∶V(0.02 mol/L乙酸铵)∶V(乙酸)∶V(三乙胺)=60∶40∶0.5∶0.5为流动相,波长242 nm下紫外检测器检测,建立了一种简单、灵敏的人体血清中游离皮质醇的检测方法.该方法测定皮质醇的线性范围为(0.1~3.0)×10-6g/mL,标准曲线线性相关系数为0.997 9,方法检出限为2.5×10-8g/mL,样品加标回收率为86.0%~91.7%.测定了8个人体麻醉前后的血样样本皮质醇含量.该方法准确,稳定,有良好的重现性和较高的灵敏度.
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Key words
HPLC,cortisol,solid-phase extraction,serum
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