西北师范大学学报(自然科学版)
西北師範大學學報(自然科學版)
서북사범대학학보(자연과학판)
JOURNAL OF NORTHWEST NORMAL UNIVERSITY(NATURAL SCIENCE)
2001年
1期
60-62
,共3页
王志华%卢小泉%耿再新%文辉%康敬万%高锦章
王誌華%盧小泉%耿再新%文輝%康敬萬%高錦章
왕지화%로소천%경재신%문휘%강경만%고금장
铅%阳极溶出伏安法%碳糊电极
鉛%暘極溶齣伏安法%碳糊電極
연%양겁용출복안법%탄호전겁
用2,4,6-三(3,5-二甲基吡唑)-1,3,5-三嗪(TDT)制得碳糊修饰电极,在pH=5.5的HAc-NaAc缓冲溶液中,将Pb(Ⅱ)富集在电极上,用差示脉冲阳极溶出伏安法测定铅,Pb(Ⅱ)的浓度在5.1×10-8~8.0×10-5mol/L范围内与峰高呈良好的线性关系.该电极用于测定自来水中铅(Ⅱ)的含量,效果满意.
用2,4,6-三(3,5-二甲基吡唑)-1,3,5-三嗪(TDT)製得碳糊脩飾電極,在pH=5.5的HAc-NaAc緩遲溶液中,將Pb(Ⅱ)富集在電極上,用差示脈遲暘極溶齣伏安法測定鉛,Pb(Ⅱ)的濃度在5.1×10-8~8.0×10-5mol/L範圍內與峰高呈良好的線性關繫.該電極用于測定自來水中鉛(Ⅱ)的含量,效果滿意.
용2,4,6-삼(3,5-이갑기필서)-1,3,5-삼진(TDT)제득탄호수식전겁,재pH=5.5적HAc-NaAc완충용액중,장Pb(Ⅱ)부집재전겁상,용차시맥충양겁용출복안법측정연,Pb(Ⅱ)적농도재5.1×10-8~8.0×10-5mol/L범위내여봉고정량호적선성관계.해전겁용우측정자래수중연(Ⅱ)적함량,효과만의.
A differential pulse anodic stripping voltammetry was developed for the sensitive and selective determination of Pb(Ⅱ) at a 2,4,6-tri(3,5-dimethylpyrazoyl)-1,3,5-triazine modified carbon paste electrode. The analysis procedure consisted of an open circuit accumulation step in stirred sample solution,a medium exchange step to a clean solution and subsequently a anodic potential stripping step.The current was proportional to the concentration of the Pb(Ⅱ) ion in a range from 5.1×10-8 to 8.0×10-5 mol/L for 5min accumulation,while most of metal ions did not interfere the determination.The developed method was applied to Pb(Ⅱ) determination in tap water.