TWI303313B - Ion solution concentration-detecting device - Google Patents

Ion solution concentration-detecting device Download PDF

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Publication number
TWI303313B
TWI303313B TW095131356A TW95131356A TWI303313B TW I303313 B TWI303313 B TW I303313B TW 095131356 A TW095131356 A TW 095131356A TW 95131356 A TW95131356 A TW 95131356A TW I303313 B TWI303313 B TW I303313B
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Taiwan
Prior art keywords
electrode
solution concentration
ionic solution
sensing device
sensing
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TW095131356A
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Chinese (zh)
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TW200811434A (en
Inventor
Shen Kan Hsiung
Jung Chuan Chou
Tai Ping Sun
Chung We Pan
Chin Shuen Hung
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Univ Chung Yuan Christian
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1303313 九、發明說明: 【發明所屬之技術領域】 本發明有關於一種離子溶液濃度感測裝置,特別是有關於 一種結合高分子式參考電極及具有感測膜之接觸式感測電極 之離子溶液濃度感測裝置。 【先前技術】 一般接觸式感測裝置係將一參考電極及一工作電極置於 測量溶液中,以一電錶連接參考電極及工作電極以形成一迴 > 路,因參考電極及工作電極分別與測量溶液產生化學變化而產 生不同電位差(電壓式感測器,potentiometric biosensor)或電流 (電流式感測器,amperometric biosensor),根據此電位差或電流 大小即可測出該測量溶液之離子濃度。 參考電極一般為一銀/氯化銀電極,表層為一高分子膜 (polymeric membrane),高分子膜係為包含離子之混合物,一 般為氣離子,當高分子膜置於測量溶液中時,允許測量溶液與 該高分子膜間交換離子,進而再與銀/氯化銀電極交換離子, 維持電極之穩定並提供穩定的一固定電位。工作電極係於電極 表層形成一感測膜,於感測膜感測離子溶液中之離子濃度,不 同離子濃度將引起不同之電流,利用電流大小測出離子濃度。 如美國第6932894號專利,請參考第1圖,利用一親水性 (hydrophilic)或親油性(hydrophobic)之感測膜(membrane)20 包 埋一含氮雜環交連高分子 (cross-linker polymer of heterocyclic nitrogen)以感應測量溶液中的離子濃度,感測膜 20 包覆工作電極(working electrode)14、參考電極(reference electrode)16 及一感應層(sensing layer)18,二電極間以一基板 12隔開,感應層18位在工作電極14上,此設計具有高穩定 1303313 性、高反應速度及大測量範圍等優點,但其應關專對測量产 液中的糖之濃度,並未提及對離子濃度之測量。 由於傳統之測量裝置之工作電極與參考電極分開,攜帶 使用上不方便,而固定為—裝置則需要量測不同溶液時 換整個量測裝置,量測裝置仍需要改善其效能及便利性。 【發明内容】1303313 IX. Description of the Invention: [Technical Field] The present invention relates to an ion solution concentration sensing device, and more particularly to an ion solution concentration of a polymer-based reference electrode and a contact sensing electrode having a sensing film Sensing device. [Prior Art] A general contact sensing device places a reference electrode and a working electrode in a measuring solution, and connects a reference electrode and a working electrode with an electric meter to form a back path, because the reference electrode and the working electrode respectively The measurement solution generates a chemical change to produce a different potential difference (potentiometric biosensor) or a current (amperometric biosensor), and the ion concentration of the measurement solution can be measured according to the potential difference or the current. The reference electrode is generally a silver/silver chloride electrode, the surface layer is a polymer membrane, and the polymer membrane is a mixture containing ions, generally a gas ion, which is allowed when the polymer membrane is placed in the measurement solution. The measurement solution exchanges ions with the polymer film, and then exchanges ions with the silver/silver chloride electrode to maintain the stability of the electrode and provide a stable fixed potential. The working electrode is formed on the surface of the electrode to form a sensing film. The sensing film senses the ion concentration in the ion solution, and the different ion concentration will cause different currents, and the ion concentration is measured by the current magnitude. For example, in US Pat. No. 6,932,894, please refer to FIG. 1 for embedding a nitrogen-containing heterocyclic crosslinked polymer with a hydrophilic or hydrophilic membrane 20 The heterocyclic nitrogen is used to inductively measure the concentration of ions in the solution, and the sensing film 20 covers a working electrode 14, a reference electrode 16 and a sensing layer 18, and a substrate 12 between the electrodes. Separated, the sensing layer 18 is located on the working electrode 14. This design has the advantages of high stability 1303313, high reaction speed and large measuring range, but it should be specifically measured to measure the concentration of sugar in the production liquid, and there is no mention. Measurement of ion concentration. Since the working electrode of the conventional measuring device is separated from the reference electrode, it is inconvenient to carry and use, and the fixing device is required to measure the different solutions, and the measuring device still needs to improve its efficiency and convenience. [Summary of the Invention]

本發明之-目的係提出一種接觸式感測電極,其具有 感測膜以感應溶液中之離子濃产。 參考ir之—目的係提出—種乾式參考電極,其提供穩定之 本月之另目的係提供一種離子溶液濃度感測裝置 =以測量溶液林_子之濃度,湘制式感測電極作為工 作電極,測量不同離子溶液年 " 觸式感測電極即可。夺僅㊉更換具有不同感測臈之接 / I 6 ί達上述目的’根據本發明之—種接觸式感測電極之實施 例包含一基板,基板上形成—導電層,導電層上的—部 感測膜,彻—保護層覆蓋導電層 =感測膜以能夠與離子溶液接觸,藉以感測離子 叙離子產生電職,並料電敎 不4液直接接觸,f㈣保護層是環氧樹脂。 感測膜包含一金屬氧化物薄 5子之有機兩分子膜測量包含不同離子子 溶液,常用_子物料H及氯轉子物f離子 1303313 圖,以測量溶液中離子濃度為例,電錶400之陰極連接一參考 電極100之導線110,陽極連接接觸式感測電極200之導線 210,將參考電極100與接觸式感測電極200置於一測量溶液 300中以構成一迴路,當接觸式感測電極200之感測膜與參考 電極100之高分子膠體與溶液進行離子交換時產生感應電 位,感應電位差即為電錶所測得之電壓,此電壓即對應測量溶 液300中之待測離子之濃度。 第6圖為本發明之另一實施例的一測量裝置之架構圖,對 於訊號較弱時,可先利用一電壓放大器410將電壓訊號放大, 將電壓放大器410連接一數位電錶420即可讀出其電壓。可以 選擇的,為了連續測得待測溶液之濃度變化,可將數位電錶 420連接一數據處理單元430以獲得其濃度之連續變化,其中 電壓放大器410及數位電錶420連接共同之地線以避免雜訊。 以上所述之實施例僅係為說明本發明之技術思想及特 點,其目的在使熟習此項技藝之人士能夠瞭解本發明之内容並 據以實施,當不能以之限定本發明之專利範圍,即大凡依本發 明所揭示之精神所作之均等變化或修飾,仍應涵蓋在本發明之 專利範圍内。 【圖式簡單說明】 第1圖所示為習知技術之一感應器之測量電極-參考電極之截 面剖視圖。 第2圖所示為本發明一實施例之參考電極之側面剖視圖。 第3圖所示為本發明一實施例之工作電極之側面剖視圖。 第4圖所示為本發明另一實施例之感測元件裝置架構圖。 第5圖所示為本發明一實施例之感測裝置架構圖。 第6圖所示為本發明另一實施例之感測裝置架構圖。 1303313 【主要元件符號說明】SUMMARY OF THE INVENTION The object of the present invention is to provide a contact sensing electrode having a sensing membrane to sense the concentration of ions in the solution. Reference to ir - the purpose is to propose a dry reference electrode, which provides a stable month of this month to provide an ionic solution concentration sensing device = to measure the concentration of the solution forest, the Xiang-type sensing electrode as a working electrode, Measure the different ion solution years " touch sensing electrodes. The embodiment of the contact sensing electrode according to the present invention comprises a substrate on which a conductive layer is formed, and the conductive layer is formed on the conductive layer. The sensing film, the protective layer covers the conductive layer = the sensing film is capable of contacting the ionic solution, thereby sensing the ion sigma to generate an electric power, and the electric sputum is not directly contacted with the liquid, and the f (four) protective layer is an epoxy resin. The sensing film comprises a metal oxide thin 5 organic two-molecule film measurement containing different ionic solution, commonly used _ sub-material H and chlorine rotor f ion 1303313 map, to measure the ion concentration in the solution, for example, the cathode of the meter 400 A lead 110 connected to a reference electrode 100 is connected to the lead 210 of the contact sensing electrode 200, and the reference electrode 100 and the contact sensing electrode 200 are placed in a measuring solution 300 to form a loop when the contact sensing electrode When the sensing film of 200 and the polymer colloid of the reference electrode 100 are ion-exchanged, an induced potential is generated, and the induced potential difference is the voltage measured by the electric meter, and the voltage corresponds to the concentration of the ion to be measured in the measuring solution 300. FIG. 6 is a structural diagram of a measuring device according to another embodiment of the present invention. When the signal is weak, the voltage signal may be amplified by a voltage amplifier 410, and the voltage amplifier 410 may be connected to a digital meter 420 to be read. Its voltage. Alternatively, in order to continuously measure the concentration change of the solution to be tested, the digital electric meter 420 may be connected to a data processing unit 430 to obtain a continuous change of its concentration, wherein the voltage amplifier 410 and the digital electric meter 420 are connected to a common ground line to avoid miscellaneous News. The embodiments described above are merely illustrative of the technical spirit and the features of the present invention, and the objects of the present invention can be understood by those skilled in the art, and the scope of the present invention cannot be limited thereto. That is, the equivalent variations or modifications made by the spirit of the present invention should still be included in the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a measuring electrode-reference electrode of an inductor of one of the prior art. Fig. 2 is a side cross-sectional view showing a reference electrode according to an embodiment of the present invention. Fig. 3 is a side cross-sectional view showing a working electrode according to an embodiment of the present invention. Figure 4 is a block diagram showing the structure of a sensing device according to another embodiment of the present invention. FIG. 5 is a structural diagram of a sensing device according to an embodiment of the present invention. FIG. 6 is a structural diagram of a sensing device according to another embodiment of the present invention. 1303313 [Key component symbol description]

12 基板 14 工作電極 16 參考電極 18 感應層 20 感測膜 110 導線 120 保護層 130 銀/氯化銀電極 140 高分子膠體 210 導線 220 基板 230 導電層 240 感測膜 250 保護膜 260 連接裝置 100 參考電極 200 接觸式感測電極 300 測量溶液 400 電錶 410 電壓放大器 420 數位電錶 430 數據處理單元12 substrate 14 working electrode 16 reference electrode 18 sensing layer 20 sensing film 110 wire 120 protective layer 130 silver / silver chloride electrode 140 polymer colloid 210 wire 220 substrate 230 conductive layer 240 sensing film 250 protective film 260 connecting device 100 Electrode 200 Contact Sensing Electrode 300 Measurement Solution 400 Electric Meter 410 Voltage Amplifier 420 Digital Meter 430 Data Processing Unit

Claims (1)

-,’w. -1303313 ^*"*、*从.一'‘一 ί.·. ΐ十、申請專利範圍Γ〜 1. 一種離子溶液濃度感測裝置,包含: -參考電極’其巾該參考電極為—乾式參考 電極包含: 'η J, I 電極,該乾式參考 一銀/氣化銀電極;及 一 π分子膠體包覆該銀/氣化銀電極; -工作電極,其中該補電極為—接觸式感測電極,該 感測電極包含: 一基板; 一導電層設置於該基板之上; 一感測膜設置於該導電層之部份表面上;及 一保護層覆蓋該導電層且暴露出該感測膜;及 一連接裝置,係以插件的方式,連接該參考電極與該工作電 極’使需測量不同待測項目時’可以更換不同之工作電極。 2;如請求項1所述之離子溶液濃度感測裝置,其中該高分子膠體 係為一含羰基之聚氣乙烯、一癸二酸二辛酯及一鹽類粉末之混合 物 >谷入一四氫咬喃固化而成。 3 ·如明求項2所述之離子溶液濃度感測裝置,其中該參考電極之 該高分子膠體之該鹽類粉末為一氣化鉀或氣化鈉粉末。 4·如請求項2所述之離子溶液濃度感測裝置,其中該參考電極之 ^亥而刀子膝體之该含艘基之聚氣乙烯、該癸二酸二辛醋及該鹽類 粉末之混合時之重量百分比例分別為33%、66%及1%。 5·如請求項1所述之離子溶液濃度感測裝置,其中該接觸式感測 電極之該基板為一玻璃基板。 11 1303313 =如凊求項丨所述之離子溶液濃度感測裝置,其中該接觸式感測 電極之該導電層包含一金屬氧化物。 7.如請求項6所述之離子溶液濃度感測裝置,其中該金屬氧化物 為二氧化锡。 .8·如請求項1所述之離子溶液濃度感測裴置,其中該接觸式感測 電極之該感測膜為一金屬氧化物薄膜。 9·如請求項8所述之離子溶液濃度感測裝置,其中該金屬氧化 _物薄膜為一二氧化錫之薄膜。 10·如請求項1所述之離子溶液濃度感測裝置,其中該接觸式感測 電極之該感測膜為一高分子膜及一離子選擇物質。 U·如請求項10所述之離子溶液濃度感測裝置,其中該離子選擇 物質係包含鉀、鈉、或氣離子物質。 12.如請求項1所述之離子溶液濃度感測裝置,其中該接觸式感測 電極之該保護層包含一環氧樹脂。 12-, 'w. -1303313 ^*"*, *From. One'' ί.. ΐ10, the scope of application for patent Γ~ 1. An ionic solution concentration sensing device, comprising: - reference electrode 'the towel The reference electrode is a dry reference electrode comprising: 'η J, I electrode, the dry reference silver/vaporized silver electrode; and a π molecular colloid coating the silver/vaporized silver electrode; - a working electrode, wherein the complement The electrode is a contact sensing electrode, the sensing electrode comprises: a substrate; a conductive layer is disposed on the substrate; a sensing film is disposed on a portion of the surface of the conductive layer; and a protective layer covers the conductive And exposing the sensing film; and a connecting device connecting the reference electrode and the working electrode 'in the case of measuring different items to be tested' in a plug-in manner, the different working electrodes can be replaced. The ionic solution concentration sensing device according to claim 1, wherein the polymer gel system is a mixture of a carbonyl-containing polyethylene, a dioctyl sebacate and a salt powder> Tetrahydrocethane solidified. The ionic solution concentration sensing device according to claim 2, wherein the salt powder of the polymer colloid of the reference electrode is a potassium carbonate or a vaporized sodium powder. 4. The ionic solution concentration sensing device according to claim 2, wherein the reference electrode of the knives and the base of the knives of the knives of the gas-containing ethylene, the sebacic acid dioctyl vinegar and the salt powder The percentage by weight of the mixture was 33%, 66% and 1%, respectively. 5. The ionic solution concentration sensing device of claim 1, wherein the substrate of the contact sensing electrode is a glass substrate. 111303313 = The ionic solution concentration sensing device of claim 1, wherein the conductive layer of the contact sensing electrode comprises a metal oxide. 7. The ionic solution concentration sensing device of claim 6, wherein the metal oxide is tin dioxide. The ionic solution concentration sensing device of claim 1, wherein the sensing film of the contact sensing electrode is a metal oxide film. 9. The ionic solution concentration sensing device of claim 8, wherein the metal oxide film is a film of tin dioxide. The ionic solution concentration sensing device of claim 1, wherein the sensing film of the contact sensing electrode is a polymer film and an ion selective material. U. The ionic solution concentration sensing device of claim 10, wherein the ion selective material comprises potassium, sodium, or a gas ionic species. 12. The ionic solution concentration sensing device of claim 1, wherein the protective layer of the contact sensing electrode comprises an epoxy resin. 12
TW095131356A 2006-08-25 2006-08-25 Ion solution concentration-detecting device TWI303313B (en)

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