摘要
研究一种以ZnO:I_2=8:2的混合物为载体的熔珠蒸馏摄谱法,直接测定地质样品中的痕量金.本法采用德国Q-24型水晶摄谱仪及国产KT-591型交流电弧发生器,选择合适电极和载体,增加了谱线强度,使金的最低可检出量达到 0.01μg/g,其单次摄谱的相对标准偏差为7.4％.
The detectable concentration of gold is effectively lowered by using the spectrometry with a covered elec-
trode and chosing a mixture of zine oxide and iodine in the proportion of 8:2 as supporter. The sample and
supporter arc mixed in 2:1 roughly. Measurements were made using a Q-24 spectrograph and an a. c. arc
with a current of 20 A and the exposure time is 65 sec. This methed generally gave a relative standard devia-
tion of 7.4％, the relative error being within 2％, the recovery being 97％～104％. Analytic range is with in
0.01～50g/t.
出处
《科技通报》
1993年第5期286-289,共4页
Bulletin of Science and Technology
关键词
地质样品
金
光谱
电极
载体
geological sample
gold
spectral analysis
electrode
supporter
