西华师范大学学报:自然科学版
西華師範大學學報:自然科學版
서화사범대학학보:자연과학판
Journal of China West Normal University:Natural Science Edition
2011年
4期
340-343
,共4页
王佳萱%李将渊%杜冰心
王佳萱%李將淵%杜冰心
왕가훤%리장연%두빙심
多壁碳纳米管%甲基红%修饰电极%L-色氨酸
多壁碳納米管%甲基紅%脩飾電極%L-色氨痠
다벽탄납미관%갑기홍%수식전겁%L-색안산
Multiwalled Carbon nanotubes%Methyl red%Modified Electrode%L-Tryptophan
制备了多壁碳纳米管-聚甲基红膜修饰电极,用循环伏安法和线性扫描伏安法研究了L-色氨酸在修饰电极上的电化学行为.结果表明:在pH=1.8的HCl-KCl底液中,L-色氨酸在修饰电极上出现一不可逆的氧化峰,氧化峰电流与其浓度在6.0×10^-6-1.0×10^-4mol/L范围内具有良好的线性关系:Ip(A)=-8.6484×10^-8-0.2636c(mol/1),相关系数R=-0.9972,检出限为2.0×10^-6mol/L,测定L-色氨酸样品回收率为96.2%-101.3%.
製備瞭多壁碳納米管-聚甲基紅膜脩飾電極,用循環伏安法和線性掃描伏安法研究瞭L-色氨痠在脩飾電極上的電化學行為.結果錶明:在pH=1.8的HCl-KCl底液中,L-色氨痠在脩飾電極上齣現一不可逆的氧化峰,氧化峰電流與其濃度在6.0×10^-6-1.0×10^-4mol/L範圍內具有良好的線性關繫:Ip(A)=-8.6484×10^-8-0.2636c(mol/1),相關繫數R=-0.9972,檢齣限為2.0×10^-6mol/L,測定L-色氨痠樣品迴收率為96.2%-101.3%.
제비료다벽탄납미관-취갑기홍막수식전겁,용순배복안법화선성소묘복안법연구료L-색안산재수식전겁상적전화학행위.결과표명:재pH=1.8적HCl-KCl저액중,L-색안산재수식전겁상출현일불가역적양화봉,양화봉전류여기농도재6.0×10^-6-1.0×10^-4mol/L범위내구유량호적선성관계:Ip(A)=-8.6484×10^-8-0.2636c(mol/1),상관계수R=-0.9972,검출한위2.0×10^-6mol/L,측정L-색안산양품회수솔위96.2%-101.3%.
Poly Methyl red Film/Multiwalled Carbon Modified Electrode was made. And electrochemical behavior of L-Tryptophan was studied with Cyclic voltammetry and Linear sweep vohammetry. The results indicated that there was an irreversible Oxidation peak of L-Tryptophan in HCl - KCl with pH = 1.8. Good linearity was found between oxidation peak current and concentration of L-Tryptophan - 8. 6484 × 10^ -8 - 0. 2636c(mol/l) , relative coefficient L. Recovery of L-Tryptophan in human urine was 96.2% in range from 6.0 × 10^ -6 to 1.0 × 10 ^-4mol/L. Ip(A) = R was 0. 9972 ,and a detection limit was 2.0× 10^ -6 mol/ -101.3%.