摘要
二肟试剂可与Ni(Ⅱ)、Pt(Ⅱ)、Pd(Ⅱ)生成不溶于水的稳定配合物,以环己烷二酮二肟、氢氧化钠为底液,催化极谱法测定Pd(Ⅱ)配合物,测量浓度线性范围为5×10^(-8)～5×10^(-5)mol/L,但配合反应需在90℃的水浴中进行,操作不便,以α-糠偶酰二肟(FD)、NH_3/NH_4Cl为底液,脉冲极谱法测定Pd(Ⅱ)配合物的研究空白值较高,灵敏度较低。
In 0. 065 mol/L Na2c63/NaHCO3(pH9. 7) buffer solution containing 2. 0× 10-6 mol/L a-furil dioxime (FD),a sensitive complex wave of Pd( Ⅱ )-FD was observed by using linear sweep voltammetry. The peak height of the wave is directly proportional to the concentration of Pd ( Ⅱ ) in the range 1.1× 10-9-7. 5× 10-8 mol/L. The behaviour of the complex of Pd( Ⅱ ) with FD at mercury electrode was investigated in detail. The molar ratio of Pd( Ⅱ ) to FD is 1:2 . The apparent stability constant is 4. 9 ×1012. This method has been applied satisfactorily to the determination of trace palladium in ores.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第8期891-893,共3页
Chemical Journal of Chinese Universities
关键词
钯
伏安法
配合吸附波
二肟试剂
Voltammetry, Adsorptive complex wave, Palladium, Trace analysis
