中国环境监测
中國環境鑑測
중국배경감측
ENVIRONMENTAL MONITORING IN CHINA
2014年
4期
140-145
,共6页
郑冬云%刘晓军%朱珊莹%曹汇敏%陈亚光%胡胜水
鄭鼕雲%劉曉軍%硃珊瑩%曹彙敏%陳亞光%鬍勝水
정동운%류효군%주산형%조회민%진아광%호성수
聚溴酚蓝%玻碳电极%亚硝酸盐%电化学传感
聚溴酚藍%玻碳電極%亞硝痠鹽%電化學傳感
취추분람%파탄전겁%아초산염%전화학전감
poly (bromophenol blue)%glassy carbon electrode%nitrite%electrochemical sensing
借助于简单可控的在线电聚合方法,溴酚蓝被修饰到玻碳电极表面,制备了聚溴酚蓝修饰玻碳电极。实验表明,聚溴酚蓝薄膜对于亚硝酸盐的电化学氧化具有很好的催化作用。经实验优化,聚溴酚蓝膜的最佳厚度为聚合20圈,最佳的检测底液为pH=4?0的0?01 mol/L磷酸盐缓冲溶液。亚硝酸盐在传感器上的电化学氧化是一个双电子双质子参与的过程。在最佳检测条件下,亚硝酸盐的氧化峰电流与其浓度在0?02~109?1μmol/L范围内有良好的线性关系,检测限低至5 nmol/L(S/N=3),所制备的亚硝酸盐传感器线性范围宽、检出限低、稳定性和重现性好、抗干扰能力强,将传感器应用于东湖水样中亚硝酸盐含量的测定,结果令人满意。
藉助于簡單可控的在線電聚閤方法,溴酚藍被脩飾到玻碳電極錶麵,製備瞭聚溴酚藍脩飾玻碳電極。實驗錶明,聚溴酚藍薄膜對于亞硝痠鹽的電化學氧化具有很好的催化作用。經實驗優化,聚溴酚藍膜的最佳厚度為聚閤20圈,最佳的檢測底液為pH=4?0的0?01 mol/L燐痠鹽緩遲溶液。亞硝痠鹽在傳感器上的電化學氧化是一箇雙電子雙質子參與的過程。在最佳檢測條件下,亞硝痠鹽的氧化峰電流與其濃度在0?02~109?1μmol/L範圍內有良好的線性關繫,檢測限低至5 nmol/L(S/N=3),所製備的亞硝痠鹽傳感器線性範圍寬、檢齣限低、穩定性和重現性好、抗榦擾能力彊,將傳感器應用于東湖水樣中亞硝痠鹽含量的測定,結果令人滿意。
차조우간단가공적재선전취합방법,추분람피수식도파탄전겁표면,제비료취추분람수식파탄전겁。실험표명,취추분람박막대우아초산염적전화학양화구유흔호적최화작용。경실험우화,취추분람막적최가후도위취합20권,최가적검측저액위pH=4?0적0?01 mol/L린산염완충용액。아초산염재전감기상적전화학양화시일개쌍전자쌍질자삼여적과정。재최가검측조건하,아초산염적양화봉전류여기농도재0?02~109?1μmol/L범위내유량호적선성관계,검측한저지5 nmol/L(S/N=3),소제비적아초산염전감기선성범위관、검출한저、은정성화중현성호、항간우능력강,장전감기응용우동호수양중아초산염함량적측정,결과령인만의。
Poly ( bromophenol blue) film modified glassy carbon electrode was fabricated through a simple and controllable in situ electro-polymerizing method, and experiment results show that the poly ( bromophenol blue) film has good catalytic ability to the electrochemical oxidation of nitrite. The optimal thick of poly ( bromophenol blue) film was electro-polymerized for 20 cycles and the optimal detection electrolyte was 0?01 mol/L pH=4?0 phosphat buffer solution. Moreover, the electrochemical oxidation of nitrite on the sensor was a two-electron and two-proton participation process. The sensor has wide linear range, low detection limit, good stability and anti-interference ability et al. At last, this sensor was successfully applied in detecting nitrite from water of the East lake.