在超高性能超临界流体染色学-血中维生素E质谱分析中的矩阵效应:样本准备和数据处理的影响
Veronika Pilařová1, Kateřina Plachká1, Frantisek Svec1
1Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 500 03, Hradec Králové, Czech Republic.
Talanta
|August 13, 2024
概括
这项研究通过比较样本准备和校准模型来评估超高性能超临界流体染色学-质谱学的矩阵效应. 对数转换校准模型和提取后分析对于准确的矩阵效应确定至关重要,特别是在稳定的同位素标记的内部标准中.
科学领域:
- 分析化学 分析化学
- 染色体学 染色体学 是一种染色学.
- 质谱测量质量谱测量
背景情况:
- 矩阵效应是使用色谱-质谱学的生物分析的一个重大挑战.
- 准确确定矩阵效应对于在复杂的生物样本中可靠量化分析物至关重要.
研究的目的:
- 评估不同的样本准备方法和校准模型,以确定和减少矩阵效应.
- 调查校准模型和样品准备对超高性能超临界流体染色体质谱学矩阵效应的影响.
主要方法:
- 对血中维生素E形式的五种样本制备方法 (蛋白沉,LLE,SLE,SPE) 的比较.
- 使用三个模型对外部和内部校准进行评估:最小平方 (1/x^0),1/x^2权重和对数转换.
- 在六个度水平上应用马图泽夫斯基的提取后方法来计算矩阵效应.
主要成果:
- 逻辑转换校准模型展示了最合适的和最小的错误.
- 根据校准模型和分析物 (例如α-托科菲罗尔,δ-托科特里昂醇) 的不同,矩阵效应有显著的变化 (+92%至-72%).
- 即使使用稳定的同位素标记内部标准 (SIL-IS),也观察到矩阵效应的度依赖性.
结论:
- 校准模型的选择,SIL-IS的使用和分析物度对矩阵效应产生了重大影响.
- 固相提取 (干扰物去除模式) 显示出最小的矩阵效应,而支持液体提取则产生了更高的回收率.
- 精心选择数据处理,样本准备,SIL-IS和染色学对于生物分析应用至关重要.
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