摘要
在0.1mol/L乙酸钠-乙酸缓冲溶液(pH5.3)中,铬黑T(EBT)于-0.40V(对SCE)处有一吸附波p1,当加入Ga(Ⅲ),在-0.63V处产生一新波p2.Ga(Ⅲ)浓度为0.001～0.24μg/ml时,ip_2∝C_(Ga)(Ⅲ),Ga(Ⅲ)的检出限达0.42ng/ml.测定镍基高温合金中微量镓(0.00149%),相对标准偏差为4.8%.
In the buffer solution of sodium acetate-acetic acid (0.1 mol/L) ( pH 5 .3 ) , the peak current of EBT ( p1 ) was observed at -0.40 V(vs.SCE) and in the presence of gallium(Ⅲ) a new adsorptive wave of Ga(Ⅲ)-EBT complex(p2) was yielded at-0.63 V(vs.SCE). The peak height of pa was directly proportional to the concentration of Ga(Ⅲ) in the range of 0.001 to 0.24 ng/ml. The detection limit was 0.42 ng Ga(Ⅲ)/ml. The content of gallium in the nickel base superalloy(0.00149%) was determined with the relative standard deviation of 4.8%.
出处
《冶金分析》
CAS
CSCD
北大核心
1991年第3期5-8,共4页
Metallurgical Analysis
基金
国家自然科学基金资助课题
