【摘要】 提出用脱乙酰壳多糖化学修饰电极为工作电极，阳极溶出伏安法测定痕量钯。在ｐＨ＝２的ＫＣｌ－ＨＣｌ底液中，＋０．０Ｖ富集２ｍｉｎ，以０．１Ｖ／ｓ扫速阳极溶出，峰电位在０．６７Ｖ（ｖｓ．ＳＣＥ），Ｐｄ在０．０７５～９．９ｍｇ／Ｌ范围内与峰高呈良好的线性关系，相关系数ｒ＝０．９９９３。在富集１０ｍｉｎ时，可检测１．５μｇ／ＬＰｄ，大大提高了测定灵敏度。样品测定结果满意。同时研究了该体系的电化学性质和电极过程机理更多还原

【Abstract】 A chitosan containing glassy carbon electrode was found to give highly sensitive voltammetric wave for Pd(Ⅱ) KCl HCl system by anodic stripping voltammetry. Various conditions for the determination of trace Pd(Ⅱ) were studied. The optimum chitosan amount in glassy carbon was 1% 4 μL. In a solution of 0.02 mol/L KCl HCl(pH=2), at 0.0 V, electrodeposited for 2 min or 1 min , scan rate was 0.1 V/s, the anodic stripping peak potential was at +0.67 V(vs.SCE). The peak current is proportional to the Pd(Ⅱ) concentration between 0.075￣9.9 mg/L, r =0.999 3. 1.5 μg/L Pd(Ⅱ) was determined by electrodeposition for 10 min. The method was applied to the determination of palladium in catalyst. The possible mechanism of electrochemical reaction has been proposed by study of CV and UV.更多还原