CAJ | 학술논문

目的：用自制碳纤维电极，采用线性扫描溶出伏安法实现锌、镉同时在碳纤维电极上的检测。方法：考察了电解质底液、富集电位、富集时间及扫描速度对Zn2+、Cd2+溶出伏安行为的影响。结果：在1 mol·L-1硫酸介质中，Zn2+、Cd2+分别在-0.97 V和-0.77 V附近产生灵敏的阳极溶出峰，峰电流与浓度呈良好的线性相关，相关系数R2分别为0.9965和0.9954。锌、镉的检出限（S/N=3）分别为1.5×10-9 mol·L-1和1.0×10-10 mol·L-1,平均加标回收率分别为98.9%和98.1%，相对标准偏差（n=6）分别为2.72%和2.45%。结论：用碳纤维电极同时检测Zn2+和Cd2+的方法具有简便、灵敏和准确的特点。
목적：용자제탄섬유전겁，채용선성소묘용출복안법실현자、력동시재탄섬유전겁상적검측。방법：고찰료전해질저액、부집전위、부집시간급소묘속도대Zn2+、Cd2+용출복안행위적영향。결과：재1 mol·L-1류산개질중，Zn2+、Cd2+분별재-0.97 V화-0.77 V부근산생령민적양겁용출봉，봉전류여농도정량호적선성상관，상관계수R2분별위0.9965화0.9954。자、력적검출한（S/N=3）분별위1.5×10-9 mol·L-1화1.0×10-10 mol·L-1,평균가표회수솔분별위98.9%화98.1%，상대표준편차（n=6）분별위2.72%화2.45%。결론：용탄섬유전겁동시검측Zn2+화Cd2+적방법구유간편、령민화준학적특점。
This study was aimed to develop a simultaneous determination of zinc and cadmium with carbon fiber electrode by linear sweep stripping voltammetry. Effects of analytical base solution, accumulation potential, ac-cumulation time and scanning velocity were also investigated on the determination. The results showed that in 1 mol·L-1 H2SO4 medium solution, zinc and cadmium had good electrochemical response on the carbon fiber electrode and appeared sensitive anodic stripping peaks at-0.97 V and-0.77 V, respectively. The anodic stripping peak cur-rents and concentrations of zinc and cadmium showed good linear relationships, with correlation coefficients R2 of 0.996 5 and 0.995 4, respectively. The detection limits of zinc and cadmium (S/N=3) were 1.5×10-9 mol·L-1 and 1.0×10-10 mol·L-1, respectively. The average recoveries of zinc and cadmium were 98.9%and 98.1%with the rela-tive standard deviations (RSD) of 2.72%and 2.45%(n=6), respectively. It was concluded that the method of simul-taneous determination of zinc and cadmium with carbon fiber electrode was simple, sensitive and accurate.