化学与粘合
化學與粘閤
화학여점합
CHEMISTRY AND ADHESION
2014年
2期
90-93
,共4页
酰基吡唑啉酮配合物%聚联吡啶%2,6-二叔丁基-4-甲基苯酚%修饰电极
酰基吡唑啉酮配閤物%聚聯吡啶%2,6-二叔丁基-4-甲基苯酚%脩飾電極
선기필서람동배합물%취련필정%2,6-이숙정기-4-갑기분분%수식전겁
Acylpyrazolone complex%poly-bipyridyl%poly-2,2-bipyridyl,2,6-di-tertbutyl-4-methylphenol%modified electrode
制备了一种新型复合膜修饰电极[GdL3（HL）]·H2O（HL=1-对甲苯基-3-甲基-4-（α-呋喃甲酰基）-5-吡唑啉酮）/聚2,2-联吡啶（Pbpy）/玻碳电极（GCE）。运用循环伏安法（CV）和脉冲伏安法（DPV），研究了电极对食品添加剂2,6-二叔丁基-4-甲基苯酚（BHT）的电化学反应与机理。与裸电极和Pbpy/GCE相比，新修饰电极测定BHT的氧化峰电流和灵敏度均显著提高。在pH=5.0，该修饰电极测试的CV曲线于Ep=0.212V处出现一个灵敏的氧化峰。峰电位差△Ep较GCE、Pbpy/GCE分别降低400mV、42mV，峰电流明显增加。在最佳条件下，氧化峰电流与BHT浓度于6.0×10-6～2.0×10-4mol·L-1范围内呈现良好的线性关系，检出限为1×10-8mol/L。
製備瞭一種新型複閤膜脩飾電極[GdL3（HL）]·H2O（HL=1-對甲苯基-3-甲基-4-（α-呋喃甲酰基）-5-吡唑啉酮）/聚2,2-聯吡啶（Pbpy）/玻碳電極（GCE）。運用循環伏安法（CV）和脈遲伏安法（DPV），研究瞭電極對食品添加劑2,6-二叔丁基-4-甲基苯酚（BHT）的電化學反應與機理。與裸電極和Pbpy/GCE相比，新脩飾電極測定BHT的氧化峰電流和靈敏度均顯著提高。在pH=5.0，該脩飾電極測試的CV麯線于Ep=0.212V處齣現一箇靈敏的氧化峰。峰電位差△Ep較GCE、Pbpy/GCE分彆降低400mV、42mV，峰電流明顯增加。在最佳條件下，氧化峰電流與BHT濃度于6.0×10-6～2.0×10-4mol·L-1範圍內呈現良好的線性關繫，檢齣限為1×10-8mol/L。
제비료일충신형복합막수식전겁[GdL3（HL）]·H2O（HL=1-대갑분기-3-갑기-4-（α-부남갑선기）-5-필서람동）/취2,2-련필정（Pbpy）/파탄전겁（GCE）。운용순배복안법（CV）화맥충복안법（DPV），연구료전겁대식품첨가제2,6-이숙정기-4-갑기분분（BHT）적전화학반응여궤리。여라전겁화Pbpy/GCE상비，신수식전겁측정BHT적양화봉전류화령민도균현저제고。재pH=5.0，해수식전겁측시적CV곡선우Ep=0.212V처출현일개령민적양화봉。봉전위차△Ep교GCE、Pbpy/GCE분별강저400mV、42mV，봉전류명현증가。재최가조건하，양화봉전류여BHT농도우6.0×10-6～2.0×10-4mol·L-1범위내정현량호적선성관계，검출한위1×10-8mol/L。
A novel composite film modified electrode [GdL3(HL)]·H2O(HL=1-(p-methylphenyl)-3-methyl-4-(α-furoyl)-5-pyrazolone/poly-2,2-bipyridyl (Pbpy)/glassy carbon electrode (GCE) was prepared for the determination of 2,6-di-tertbutyl-4-methylphenol (BHT) which was a food additive. The cyclic voltammetry(CV) and differential pulse voltammetry(DPV) were used to characterize the electrochemical behavior and to study the reaction mechanism of BHT on the electrode. Compared with the bare GCE and Pbpy/GCE, the [GdL3(HL)]·H2O/Pbpy/GCE showed an ex-cellent electro-catalytical effect on the oxidation of BHT with a significant increase of the peak current. When the pH was 5.0, an oxidation peak with Ep=0.212V was produced on the new modified electrode. The difference of peak potentials (△Ep) was 400mV lower than on bare GCE, and about 42mV lower than on Pbpy/GCE electrode. Meanwhile, the peak current markedly increased. Under the optimum conditions, the oxidation peak and BHT showed a good linear relation when the BHT concentration range was 6.0×10-6~2.0×10-4mol·L-1. The detection limit was 1×10-8mol/L.
