Tie Mei, Zhang Wei, Li Jing, Jing Kui, Zang Shu-liang, Li Hua-wei
Department of Chemistry, East China Normal University, Shanghai 200062, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2006 Jan;26(1):151-3.
In the present article, samples were digested by a quartz high-pressure digestion pot, reducing the loss of selenium in digestion. The content of selenium in edible fungi was determined by using graphite furnace atomic absorption spectroscopy, and the results showed that when the content of selenium in edible fungi was determined by using 1% Ni(NO3)2 as a matrix modifier, ashing temperature of 500 degreed C, and atomization temperature of 2 500 degrees C, and rectifying background by deuterium light, the recovery was in the range of 92.1%-115.5%, the relative standard deviation of the method was 1.28%, and the limit of detection was 15.8 microg x L(-1). The method was suitable for the determination of trace selenium in edible fungi with the advantages of being simple, rapid, sensitive, stable and accurate etc., and the results were satisfactory.
在本文中，样品采用石英高压消解罐进行消解，减少了消解过程中硒的损失。采用石墨炉原子吸收光谱法测定食用菌中的硒含量，结果表明，以1%硝酸镍作为基体改进剂，灰化温度为500℃，原子化温度为2500℃，采用氘灯扣除背景，测定食用菌中硒含量时，回收率在92.1% - 115.5%之间，该方法的相对标准偏差为1.28%，检出限为15.8μg·L⁻¹。该方法具有简便、快速、灵敏、稳定、准确等优点，适用于食用菌中痕量硒的测定，结果令人满意。
