机构地区: 宁波大学信息科学与工程学院宁波市新型功能材料及其制备科学国家重点实验室培育基地
出 处: 《林产化学与工业》 2007年第3期93-97,共5页
摘 要: 提出了用SiO2凝胶包埋葡萄糖氧化酶(GOD)电化学传感器(GOD/SiO2)测定羟甲基纤维素酶(cMcE)活性的方法,即基于电极对纤维素水解后生成葡萄糖的催化氧化。考察了各种实验条件对CMCE酶活性测定的影响。实验表明,GOD/SiO2电极检测电位为+0.57V(以饱和甘汞电极为参比电极),稳态响应电流与纤维素酶活性在5-400U/L之间有线性关系,该方法可用于微量羟甲基酶活性测定。 A new biosensor for the assay of carboxymethyl cellulase (CMCE) activity was prepared by modifying a glucose oxidase (GOD) on SiO2 gel film coated on glassy carbon electrode. The amperometric determination was based on electrochemically detected glucose produced by enzymatic reaction of sodium carboxymethyl cellulose(CMC-Na) under the catalysis of CMCE. The modified electrode can sensitively detect CMCE at + 0.57 V vs. SCE with a linear response in the range of 5 U/L to 400 U/L under an optimum condition and can be used as a promising method for determination of CMCE activity in micro-analysis.