CAJ | 학술논문

研究了1-（2-吡啶偶氮）-2-萘酚修饰玻碳电极检测痕量汞的电分析方法．汞离子通过与电极表面的1-（2-吡啶偶氮）-2-萘酚发生配位作用而富集在电极表面，同时在-0．80 V （ vs．SCE ）还原成零价的汞，当电极电势从-0．80 V向0．00 V扫描时，被还原的汞则从电极表面溶出，于-0．18 V处出现灵敏的阳极溶出峰．优化了支持电解质及pH、1-（2-吡啶偶氮）-2-萘酚的用量、富集电位及富集时间等实验参数．利用1-（2-吡啶偶氮）-2-萘酚修饰电极测定的汞的线性范围为2．0×10-9 mol/L到9．0×10-7 mol/L，检测限为6×10-10 mol/L．此方法用于水试样中汞含量的测定，平均回收率为99．88％．
연구료1-（2-필정우담）-2-내분수식파탄전겁검측흔량홍적전분석방법．홍리자통과여전겁표면적1-（2-필정우담）-2-내분발생배위작용이부집재전겁표면，동시재-0．80 V （ vs．SCE ）환원성령개적홍，당전겁전세종-0．80 V향0．00 V소묘시，피환원적홍칙종전겁표면용출，우-0．18 V처출현령민적양겁용출봉．우화료지지전해질급pH、1-（2-필정우담）-2-내분적용량、부집전위급부집시간등실험삼수．이용1-（2-필정우담）-2-내분수식전겁측정적홍적선성범위위2．0×10-9 mol/L도9．0×10-7 mol/L，검측한위6×10-10 mol/L．차방법용우수시양중홍함량적측정，평균회수솔위99．88％．
1-( 2-pyridylazo )-2-naphthol-modified glassy carbon electrode has been investigated to de-tect trace levels of Hg2+.Hg2+are preconcentrated on the surface of the 1-(2-pyridylazo) -2-naphthol-modified glassy carbon electrode at -0.80 V(vs.SCE), and subsequently reduced on the electrode .In the following step , reduced mercury is oxidized , and voltammograms are recorded by scanning the poten-tial towards a positive direction .The peak currents are linear with the concentrations in the range from 2. 0×10-9 mol/L to 9.0×10-7 mol/L for Hg2+.The detection limits are 6×10-10 mol/L for Hg2+.The coeffi-cients of variation, determined on one single electrode at a concentration of 5×10-7 mol/L Hg2+,have been calculated to be 2.8%for Hg2+(n=8).Using this kind of modified electrode, trace levels of Hg2+in several water samples are determined , and the average recovery is 99.88%.