摘要
比较了磷酸二氢铵,氯化铵两种基体改进剂对石墨炉原子吸收光谱法(GF-AAS)测定了山药中铅元素的含量的研究。两种基体改进剂测得山药中的Pb含量分别为39.2μg.mL-1(氯化铵)、40.0μg.mL-1(磷酸二氢铵),回收率分别为106.5%、95.57%,RSD为均小于5%。最佳测定方法为:以磷酸二氢铵作为基体改进剂,灰化温度为1100℃,原子化温度为1900℃时,用氘灯校正背景进行测定。
The investigation was compared to determine the contents of lead element in Dioscorea opposita by graphite gurnace atomic absorption spectroscopy(GF-AAS) with two matrix modifiers(ammonium dihydrogen phosphate and ammonium chloride).The contents of lead in Dioscorea opposita were respectively 39.2μg·mL-1(chloride) and 40.0μg·mL-1(ammonium dihydrogen phosphate),the recoveries were respectively 106.5% and 95.57% and the RSDs were less than 5%.The best method for the determination was follows:ammonium dihydrogen phosphate as matrix modifier,ashing temperature of 1100℃,atomic transition temperature of 1900℃ and correcting the background of deuterium lamp.
出处
《光谱实验室》
CAS
CSCD
2012年第3期1670-1673,共4页
Chinese Journal of Spectroscopy Laboratory
关键词
石墨炉原子吸收光谱法
山药
铅
基体改进剂
Graphite Furnace Atomic Absorption Spectroscopy
Dioscorea opposita
Lead
Matrix Modifier