化学与生物工程
化學與生物工程
화학여생물공정
CHEMISTRY & BIOENGINEERING
2014年
9期
71-75
,共5页
生物传感器%三磷酸腺苷(ATP)%流动注射分析%核酸适体%聚离子敏感膜电极
生物傳感器%三燐痠腺苷(ATP)%流動註射分析%覈痠適體%聚離子敏感膜電極
생물전감기%삼린산선감(ATP)%류동주사분석%핵산괄체%취리자민감막전겁
biosensor%adenosine triphosphate(ATP)%FIA%aptamer%poly ion-sensitive membrane electrode
以核酸适体为识别分子、以经鱼精蛋白活化的聚离子敏感膜电极为信号识别单元,构建了一种检测三磷酸腺苷(ATP)的流动注射分析方法。核酸适体与鱼精蛋白之间的静电作用能够引起电极电位的变化,核酸适体与 ATP的相互作用使核酸适体的形态发生一定的变化,这种变化能够阻止核酸适体与鱼精蛋白之间的作用,据此实现对 ATP的电位检测。结果表明,在电流为10 nA、载液流速为2.0 mL·min-1、进样量为80μL的优化条件下,本方法对ATP检测的线性范围为2.0~12.0μmol· L-1,检出限为1.4μmol· L-1。本方法亦可用于对其它聚阴离子检测。
以覈痠適體為識彆分子、以經魚精蛋白活化的聚離子敏感膜電極為信號識彆單元,構建瞭一種檢測三燐痠腺苷(ATP)的流動註射分析方法。覈痠適體與魚精蛋白之間的靜電作用能夠引起電極電位的變化,覈痠適體與 ATP的相互作用使覈痠適體的形態髮生一定的變化,這種變化能夠阻止覈痠適體與魚精蛋白之間的作用,據此實現對 ATP的電位檢測。結果錶明,在電流為10 nA、載液流速為2.0 mL·min-1、進樣量為80μL的優化條件下,本方法對ATP檢測的線性範圍為2.0~12.0μmol· L-1,檢齣限為1.4μmol· L-1。本方法亦可用于對其它聚陰離子檢測。
이핵산괄체위식별분자、이경어정단백활화적취리자민감막전겁위신호식별단원,구건료일충검측삼린산선감(ATP)적류동주사분석방법。핵산괄체여어정단백지간적정전작용능구인기전겁전위적변화,핵산괄체여 ATP적상호작용사핵산괄체적형태발생일정적변화,저충변화능구조지핵산괄체여어정단백지간적작용,거차실현대 ATP적전위검측。결과표명,재전류위10 nA、재액류속위2.0 mL·min-1、진양량위80μL적우화조건하,본방법대ATP검측적선성범위위2.0~12.0μmol· L-1,검출한위1.4μmol· L-1。본방법역가용우대기타취음리자검측。
A flow inj ection analysis(FIA)system for determination of adenosine triphosphate(ATP)was de-veloped.The polyion-sensitive membrane electrodes were used for potentiometric detection and the aptamers were used for molecular recognition.The electrostatic interaction between aptamer and protamine could cause potential response on the electrodes.Interaction between aptamer and ATP changed the forms of aptamer,which prevented the interaction between aptamer and protamine.Based on that,the concentration of ATP could be de-termined by potential detection.Results showed that,under optimized conditions(current of 1 0 nA,flow rate of 2.0 mL·min-1 ,sample volume of 80μL),the proposed method showed a good linear relationship to ATP in the concentration range from 2.0 to 12.0μmol·L-1 .The detection limit was calculated to be 1.4μmol·L-1 . This method can also be used for the determination of other targets.