贵金属元素电化学分析研究VI.黄原酸钠纤维素酯富集,分离锇,钌样品中的银及其阳极溶出伏安法测定

Cellulose xanthate cotton was used for enrichment and separation of Ag from bulk Os and Ru from 0.65 mol HNO3/L solution The adsorbed Ag was eluted with 8-10 4M HNO3. Submicrogram quantity of Ag can be enriched and separated from the cotton with a recovery of 98%. Trace Ag was determine on glass carbon electrode by anodic stripping voltammetry in the electrolytic system of 0.1 mol KSCN/L-0.2 mol HNO3/L-2.5 mol CyDTA/L. The linear range between the concentration and the peak current of Ag is 10-11 to 10-7 g/mL. The detection limit reaches 10 parts per trillion for 10 min electrolysis. The relative standard deviation is 4.2% for Os sample with 6 replicate detns. The results agree with those obtained by atomic absorption spectrometry.     

硫离子—荧光素—抗坏血酸吸附催化波研究及应用

1 引言 本文提出硫在0.15mol/L NaOH—5.0×10~(-5)mol/L荧光素—0.050mol/LV_0—0.10mol/L水杨酸钠—0.010mol/L EDTA体系中,在—0.73V(vs.SCE)处,有一个极灵敏的示波极谱导数波,该波具有络合物吸附波特性。检测灵敏度可达6×10~(-9)mol S~(2-)/L,成为目前硫的电化学分析中最灵敏的方法之一。将本法用于水     

聚中性红膜修饰电极上神经递质的电化学行为及应用

利用循环伏安法研究了神经递质多巴胺、肾上腺素及云甲紧肾肯朱素在聚中性红膜电极上的电化学行为。     

亚铁氰化钾掺杂聚中性红膜修饰电极的制备及电分析特性

对亚铁氰化钾掺杂的聚中性红膜修饰电极的制备及其电化学行为和Ｆｅ（ＣＮ）６４－在该电极上的催化作用进行了研究。结果表明,该修饰电极对Ｆｅ（ＣＮ）６４－存在较强的电催化作用,催化峰电流与Ｆｅ（ＣＮ）６４－的浓度在 １．０×１０－５～２．０×１０－３ ｍｏｌ／Ｌ范围内呈良好的线性关系,检测限可达５×１０－６ｍｏｌ／Ｌ