采用稳定同位素稀释法和场解吸质谱法测定脑组织中的铊。

Determination of thallium in brain tissue by stable isotope dilution and field desorption mass spectrometry.

作者信息

Schulten H R, Lehmann W D, Ziskoven R

出版信息

Z Naturforsch C Biosci. 1978 Jul-Aug;33(7-8):485-7.

PMID:152001

Abstract

The utility of field desorption mass spectrometry for quantitative metal cation analysis in forensic sciences is demonstrated by the determination of a lethal thallium level in the brain tissue of an experimental animal. Stable isotope dilution and accumulation of the electrically recorded field desorption ion currents with a multi-channel analyzer allowed a direct estimation of thallium in homogenized tissue samples without further pretreatment. Experiments with standard solutions revealed the limit of detection for thallium to be about 10 pg of the metal cation.

摘要

通过测定实验动物脑组织中的致死铊含量，证明了场解吸质谱法在法医学定量金属阳离子分析中的实用性。采用稳定同位素稀释法，并利用多通道分析仪对电记录的场解吸离子电流进行累积，使得无需进一步预处理即可直接估算匀浆组织样品中的铊含量。对标准溶液进行的实验表明，铊的检测限约为10皮克金属阳离子。