[Determination of selenium by platform graphite furnace atomic absorption spectrometry].
The matrix modifier and its amount, the ashing or atomization temperature of selenium and interference experiment are investigated. The experimental result shows that the application of Pd-Ca as mixed matrix modifier not only reduces interference but also enhances ashing temperature and increases sensitivity. The method can be used directly for the determination of selenium in cereal by platform graphite furnace atomic absorption. The characteristic mass is 39 ng,the detection limit is 0.11 microg/g, the relative standard deviation is 4.9-7.7% and the recovery is 92-100%.
Xie
W
W
Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun.
Yao
J
J
Ma
G
G
D006108:Graphite / Q000737:chemistry*; D057230:Limit of Detection; D012643:Selenium / Q000032:analysis*; D013054:Spectrophotometry, Atomic; D013696:Temperature
D006108:Graphite; D012643:Selenium