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암모늄선택성 전극을 이용한 요소센서의 오차보정에 관한 연구
김영노,신두순,김창용,신재호,남학현,차근식,Kim, Young No,Shin, Doo Soon,Kim, Chang Yong,Shin, Jae Ho,Nam, Hakhyun,Cha, Geun Sig 대한화학회 1995 대한화학회지 Vol.39 No.12
Nonactin을 이온운반체로 사용한 암모늄선택성 전극막 위에 urease를 고정시킨 형태의 요소센서는 혈액 중 여러가지 이온으로부터 방해작용을 받을 수 있다. 이 방해작용은고정화된 효소반응보다는 암모늄선택성 전극막 자체의 부적합한 선택성의 기인한 것이며 본 연구에서는 혈액 중의 요소를 측정할 경우 이들 방해이온에 의해 발생된 오차를 보정하고자 하였다. 이를 위해 혈액 속에 각 방해이온의 정상 평균농도를 포함하고 있는 용액을 검정용액으로 사용하여 이들 방해이온으로부터의 오차를 감소시키고자 하였다. 또한 칼륨이온선택성 전극을 부가적으로 사용하여 요소전극의 측정치를 보정하여 오차를 최소화하고자 하였다. 이와 같은 방법들에 의해 보정된 측정치의 오차는 보정하지 않았을 경우에 비해 현저히 감소함을 알 수 있었다. Urea sensors, prepared by immobilizing urease on ammonium-selective membrane electrodes doped with nonactin, can show interference from several ionic species present in blood samples (e.g., sodium, potassium, and endogenous ammonium ions). This interference problem does not arise from the immobilized biocatalytic reaction but rather from the innate response of the base transducer to ionic species in the sample. In this work, the use of calibrators containing adequate amounts of ionic species is examined to reduce errors caused by endogenous ionic interferences with blood urea measurements. Simultaneous measurements of the interfering species with additional sensors and subsequent substractions of these values from the urea electrode signals are also described. It is shown that the use of a potassium-selective electrode with an adequate calibrator system greatly enhances the accuracy of the urea sensor measurements.
김영노(Yeoung Noh Kim),신봉일(Bong Il Shin),이희철(Hee Chul Lee),곽노홍(No Hong Kwak),전영수(Young soo Jeon),박상호(Sang Ho Park),이일무(Il Moo Lee) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
The additional matters appear to be considered in several aspects for building up power-quality measuring system of transmission system(high voltage system) compared to distribution system(middle or low voltage system). Like in distribution system, input signals are also received from PT and CT source of voltage and current respectively in transmission system and applied in accordance with a certain rate. In this case, very big error rate can be occurred according to the specification of the measuring system as the applying rate is bigger than in distribution system beyond comparison. In addition, when the abnormal signal occurred such as sag/swell, interruption, transient etc. power quality of other sites linked to the system also should be checked to find the accurate cause of the abnormal power-quality signals from the corresponding. site. Accordingly, the accurate diagnosis on the condition of power quality for the system depends on the way how the synchronization system is brought along for each site. This paper will suggest the solution for the most effective system building focused on how to solve the problem of the error rate and synchronization described in the above when building up the measuring system of power quality for transmission system.