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  1. NTU Theses and Dissertations Repository
  2. 生物資源暨農學院
  3. 生物機電工程學系
Please use this identifier to cite or link to this item: http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/55907
Title: USB驅動型迷你恆電位儀之開發與鄰苯二甲醛消毒劑之檢測
Development of a USB-powered Mini-potentiostat and the Detection of o-phthalaldehyde Disinfectant
Authors: Wei-Cheng Chen
陳韋成
Advisor: 陳力騏(Richie L. C. Chen)
Co-Advisor: 陳仲瑄(Chung-Hsuan Chen)
Keyword: 恆電位儀,鄰苯二甲醛,消毒劑,
potentiostat,o-phthalaldehyde,disinfectant,
Publication Year : 2014
Degree: 碩士
Abstract: 本研究採用具有高輸入阻抗、低輸入偏壓電流與低輸入補償電壓等特性之運算放法器(OPA2336P,Texas Instruments),搭配USB供電的DAQ(NI 6008/6009,National Instruments)與LabVIEWTM撰寫的圖形化使用者介面,組裝一台平行輸入自動換檔並且便於攜帶之小型恆電位儀,可應用於實驗室外的現場檢測並且與商用實驗室泛用型儀器(AutolabTM,Eco Chemie)相比所得到之檢測結果幾乎相同。本研究所提出之恆電位儀操作電位的範圍約從-1.3 V到1.1 V,最佳量測的解析度可到100 pA。以本研究所提出之恆電位儀搭配流動式注射系統,對鄰苯二甲醛濃度做初步的的濃度檢測,所量測到的氧化電流大小在0.2%-0.65%(w/v)範圍內呈線性相關(R2 = 0.9911),且變異係數小於5%,靈敏度為0.18 μA/cm2 mM,可應用於評估消毒內視鏡常用之鄰苯二甲醛最低有效濃度(Minimum effective concentration, MEC)。
An auto ranging mini-potentiostat was constructed by parallel reading architecture and using operational amplifiers (OPA2336P, Texas Instruments) with high input impedance, low input bias current and low input offset voltage. After implementing with a USB-powered DAQ (NI 6008/6009, National Instruments) and LabVIEWTM based graphical user interface, the portable electrochemical device can be used for on-site analysis with a performance comparable to a commercialized laboratory machine (AutolabTM, Eco Chemie). The operating voltage ranges from -1.3 V to 1.1 V and the resolution can reach 100 pA level. The mini-potentiostat was served as the amperometric detector of a conventional flow injection analysis system for measuring o-phthalaldehyde concentration. The current outputs (the peak heights of FIAgram) are reproducible (CV < 5%) and showed good linearity (R2 = 0.9911) in the range of 0.2%-0.5% (w/v), which can be used to evaluate the antiseptic efficiency (minimum effective concentration of o-phthalaldehyde) of the disinfectant used for cleaning endoscope. The sensitivity is 0.18 μA/cm2 mM.
URI: http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/55907
Fulltext Rights: 有償授權
Appears in Collections:生物機電工程學系

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