目的 探讨用于类固醇激素液相色谱-串联质谱(LC-MS/MS)检测,室内质控干血滤纸片(DBS)类固醇激素质控品的制备方法.方法 收集全血,分离血细胞和血浆,生理盐水洗涤血细胞,活性炭过夜吸附血浆,添加标准品,制成低、中、高三个浓度的DBS类固醇激素质控品,LC-MS/MS检测并分析其精确度、准确度、稳定性及不同血斑间的差异.结果 DBS类固醇激素质控品批内精确度和准确度分别为2.4 %~7.0 %,102.0 %~111.0 %;批间精确度和准确度分别为5.1%~9.8%,99.0%~114.8%;-20℃保存5个月,月间差异无统计学意义(P>0.05);不同血斑间变异系数为3.3%~8.2%,变异系数较小.结论 配制的DBS类固醇激素质控品具有良好的精确度、准确度及稳定性,血斑间差异小,符合室内质控品要求,可用于LC-MS/MS检测类固醇激素的室内质控.%Objective To investigate the preparation method of dry blood spots (DBS) control materials for steroids used for internal quality control by liquid chromatography tandem mass spectrometry (LC-MS/MS). Methods Whole blood was collected and the blood cells and plasma were separated. The blood cells were washed by saline. The activated charcoal was added to the plasma. Standard substance was added to make different concentrations (low, medium, and high) of DBS control materials for steroids. The precision, accuracy, stability, and differences among different blood spots were detected and analyzed by LC-MS/MS. Results The inter-day precision and accuracy of DBS control materials for steroids were 2.4%-7.0% and 102.0%-111.0%, respectively, and the intra-day precision and accuracy were 5.1%-9.8% and 99.0%-114.8% respectively. The DBS control materials for steroids were stored for 5 months, and there was no difference among the different months (P>0.05). The coefficients of variation among different blood spots were small, 3.3%-8.2%. Conclusions The DBS control materials for steroids has good precision, accuracy and stability. The difference among different blood spots is small and meet the requirements of indoor quality control products. They can be used for the internal quality control in steroids detection by LC-MS/MS.
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