摘要
在0.2mol·L ̄(-1)NH_4Cl-NH_3·H_2O底液中,(pH为9.26),得到一个极为灵敏的Fe(Ⅲ)-TEA-5-Br-PADAP-H_2O_2配合吸附催化波,其峰电位为-0.71V(vs.SCE)。铁浓度在1.8×10 ̄(-10)~5.4×10 ̄(-6)mol·L ̄(-1)范围内与二阶导数波高呈线性关系。对该极谱波的性质进行了研究,证明是一种配合吸附催化波,并成功地应用于各类水样,钒催化剂中微量或痕量铁的测定。
In a supporting electrolyte containing 0.2 mol/LNH_4Cl-NH_3·H_2O at pH9. 26,a sensitive complex waveof Fe(Ⅲ)-TEA-5-Br-PADAP-H_2O_2 can be obtained by single-sweep polarography. The peak potential ofthe derivative wave is -0.71V( vs. SCE ).A linearrelationship between peak currents and concentrationsof Fe(Ⅲ) holds in the range of 1.8×10 ̄(-10)~5. 4×10 ̄(-6) mol/L of Fe(Ⅲ).In this paper the behavior ofthe polarographic complex wave was presented. It wasshown that this is a kind of catalytic wave. Themethod has been applied to determine trace or microFe in water and V-catalyst with satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
1994年第6期68-71,共4页
Chinese Journal of Analysis Laboratory
关键词
铁
三乙醇胺
PADAP
极谱波
Iron determinaton
5-Br-PADAP
TEA
H_2O_2
single-sweep polarography