Shan Fang, Bian Jun-sheng
Institute of Agricultural Products Comprehensive Utilization, Shanxi Academy of Agriculture Sciences, Taiyuan 030031, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2002 Jun;22(3):480-2.
The determination of Cu and Pb in edible L-lysine by rapid graphite furnace atomic absorption spectrometry (GFAAS) is described in this paper. The sample is dissolved with thin acid and mensurated directly by GFAAS. It does not need dry ashing and wet digesting and without chemical matrix modifier. The Graphite Furnace's function of pre-treatment is fully used. Results can be obtained as soon as possible and avoid unnecessary contamination and loss of samples. The method is simple, rapid, practical and have good precision and accurate. Under the optimum conditions the result indicates that the relative standard deviation of Cu and Pb is 4.8% and 5.3% respectively, the recovery rate is 100%-110% and 102%-105% separately.
本文介绍了用快速石墨炉原子吸收光谱法（GFAAS）测定食用L-赖氨酸中铜和铅的方法。样品用稀酸溶解后直接用GFAAS测定。无需干灰化和湿法消解，也无需化学基体改进剂。充分利用了石墨炉的预处理功能。能尽快获得结果，避免样品不必要的污染和损失。该方法简便、快速、实用，具有良好的精密度和准确性。在最佳条件下，结果表明铜和铅的相对标准偏差分别为4.8%和5.3%，回收率分别为100%-110%和102%-105%。
