TW295627B - - Google Patents

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TW295627B
TW295627B TW85106464A TW85106464A TW295627B TW 295627 B TW295627 B TW 295627B TW 85106464 A TW85106464 A TW 85106464A TW 85106464 A TW85106464 A TW 85106464A TW 295627 B TW295627 B TW 295627B
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container
oxygen demand
titration
station
tank
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TW85106464A
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Chinese (zh)
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Iijima Electronics Corp
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Description

295627 A7 B7 五、發明说明() 發明背景: 本發明為一種化學需氧量(C 0 D )測定裝置能夠自 動測定排水中的化學需氧量(C 0 D )。 往昔技藝: 按一般化學需氧量(C 0 D )是以使用過錳酸鉀,二 鉻酸鉀等強力的氧化劑,Μ —定的條件處理試料水時,求 出所消耗的氧化劑的量,將其換算成與此對應的需氧氣的 量,Μ此表示在試料水中存在多少被氧化物質。這種化學 需氧量(C 0 D )的測定,以往都是使用滴定管,吸移管 ,駒吸移管,三角燒瓶,溫水浴槽等器具Μ手動為主, 因此具有很費工夫的缺點。 本發明乃鑑於上述已往技術之問題及缺失,爰精心研 究,且不斷開發研究,終於發展出一種化學需氧量測定裝 置。 本發明的一個目的在於提供能夠連缅Μ良好的效率自 動測定化學需氧量(COD)之測定裝置。 經濟部中央標準局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) 本發明的另一目的在於提供一化學需氧量測定裝置, 該測定装置是由外箱,與能夠使設置在該外箱內的試料液 容器以迴繞縱蚰轉動而搬運,並且在所定位置上能以上下 方向使其詡轉之容器搬蓮機構,與配置在該容器搬運機構 的周圍之試料水或稀釋液的定量自動注入機構,氣化劑或 氧化促進劑的定量自動注入機構*加熱機構,電解液定量 自動注入機構,電量滴定機構,以及具有排水、洗淨機構 之滴定裝置,與能夠控制前述容器搬蓮機構而使前述容器 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) A7 五、發明説明() K # P、@ Μ所定時間設定於前述滴定装罝的各個機構的同 時’ Μ前述排水、洗淨装置使前述容器翻轉,並且能夠與 此同步使各個機構作動之控制機構所構成。 本發明之再一目的為提供一種化學需氧量(COD) 測定装置只需將試料水安置在外箱內的所定位置,即能自 動測定化學需氧量(C 0 D )。因此能夠連續以良好的效 率自動測定化學需氧量(C ◦ D )。 為使 貴審査委員對本發明所述之工法、装置及其功 效,能作更進一步的認識與瞭解,茲擧一較佳實施例並配 合圖式詳细說明如下: 圖式簡單說明: 第一圖係顯示C 0 D測定装置的平面圖。 第二圖像顯示COD測定裝置的正面圖。 第三圖係定量自動注入器的示意圖。 第四圖係定量自動注入器的不意圖。 第五圖係加熱站的示意圖。 第六圖係電量滴定裝置的示意圖。 第七圖像排水、洗淨的示意圖° 【符號的說明】 經濟部中央標準局員工消費合作杜印製 (請先閲讀背面之注意事項再填寫本頁) 1 ·外箱 2 ·容器搬運構構 \j 3 .試料注入站 44 .氧化劑注入站 5 ·加熱站 本纸張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) A7 ________B7 五、發明説明() 6 *電解液注入站 7 *電量滴定注入站 8 ♦排水、洗淨站 第一圖、第二圖所示的是化學需氧量(C〇D )測定 裝置1 0 0,在外箱1内使1個燒杯(容器)1 1在配置 在水平圓周上的滴定装置2 0 〇的6個機構(站)上移動 . ,以便進行試料水及稀釋水的注入,氧化劑、氧化促進劑 等葯液的注人,為促進氧化的加熱,電解液的注入,殘餘 氧化劑的電量滴定,並演算試料水的化學需氧量(C〇D ),經排水後洗淨燒杯1 1。 外箱1是箱狀,在其内部裝有棚板12 (參照第二圖 )。在棚板12上安装有為了搬運燒杯11的容器搬運機 構2。在棚板1 2的下方收容有蒸餾水容器1 3,排水槽 1 4,洗淨水槽1 5,真空泵1 6。另外,在外箱1的側 壁上裝有換氣用風扇17。 經濟部中央標準局員工消費合作杜印製 (請先閲讀背面之注意事項再填寫本頁} 容器搬蓮機構2具有支柱2 1 ,與能夠挾持焼杯1 1 的夾具22,與能夠使夾具以迴繞支柱2 1轉動的帶 有馬達Μ 1的轉動機構2 3,為使夾具2 2昇降的馬達Μ 2,帶有螺牙的旋轉軸24,螺合於該旋轉軸24而具有 昇降部材25的昇降機構26,Κ及挾持燒杯1 1的夾具 2 2的旋轉機構2 7。夾具2 2能夠藉由控制裝置9Μ迴 繞支柱2 1轉動的同時,其腕部也能旋轉而將燒杯1 1上 下翻轉。 構成測定装置的6個站(機構)設置在支柱2 1周_ 本紙張尺度適用中國國家標隼(CNS ) Α4规格(210X297公釐} 205627 at B7 五、發明説明() 的棚板1 2上。第1個站是為注入試料水A及稀釋液(蒸 餾水)B的試料水注入站3,能夠把1 C C的試料水a與 9CC的蒸餾水B吸進定量自動注入器30,而注入在燒 杯11内。如圖第三圖所示,定量自動注入器30具有在 手動式手指分注器3 1上附設驅動機構3 2的構造。 第2個站是為注入氧化劑及氧化促進劑的氧化劑注人 站4,備有為注入作為氧化劑之二鉻酸鉀溶液2 C C的定 量自動注入^及為注入作為氧化促進劑之9 8%硫 酸1 5CC的電動式自動滴定管4 1。定量自動注入器4 0具有與定量自動注入器3 0相同的構造。如第四圖所示 ,電動式自動滴定管4 1是由在手動式自動滴定管42上 附設電動驅動機構4 3所形成。 第3個站是加熱站5,是由第五圖所示的附電熱器金 靥加熱塊5 1,Μ鐵弗龍材質製成的塞子5 2,鐵弗龍塞 5 2的冷卻水循環器5 3,以及鐵弗龍塞5 2的自動昇降 裝置54所構成,能夠將燒杯1 1內的液體Ml 00 °C〜 1051加熱30分〜2小時。 經濟部中央標準局貝工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 第4個站是電解液注入站6,藉由和定量自動注入器 3 0相同的定量自動注入器6 0注入2 0 C C的電解液: 作為電解液則是使用鐵明礬,硫酸亞鐵等的鐵(I I I ) 離子。 第5個站是電量滴定站7,使用第六圖所示的電量滴 定裝置7 0。電量滴定装置7 0具有電解電極7 1及指示 電極72,撹拌裝置73。在電解電極7 1的前端突設有 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) 五、發明説明() (請先閲讀背面之注意事項再填寫本頁) 路出电極74 ’ 75 ’在指不電極72的前端突設有白金 電極7 6,7 7。7 8為微電腦,能夠檢出將試料水a中 的殘餘氧化劑Μ電解電極進行電解遷原之到達遝原狀態為 止的時間,求出電流量並換算成化學需氧量(C 0 D )值 ,表示在數位顯示部7 9上。 第6個站是排水,洗淨站8,如第七圖所示能夠將燒 杯1 1上下翻轉而使内容物自漏斗8 1排出到排水槽1 4 内。此後,Κ前述真空泵1 6自洗淨水槽1 5吸取洗淨水 (蒸餾水),從嗔嘴8 2唄出到燒杯1 1内,Κ蒸餾水Β 洗淨燒杯1 1。 控制装置9能夠控制容器搬運裝置2,試料注入站3 ,氧化劑注入站4,加熱站5,電解液注入站6,電量滴 定站7及排水、洗淨站8。 經濟部中央操準局員工消費合作社印製 洗淨後的燒杯1 1被容器搬運装置2的夾具2 2所挾 持,最初設定在試料注入站3上。在這裡,把工廠排水等 從指定場所採取而置於真空容器的試料水A 1 CC吸人定 量自動注入器30内,並注入燒杯1 1中。接著’同樣將 作為稀釋液的蒸餾水B 9 C C自稀釋瓶口吸入定量自動注 入器30内,並注入燒杯1 1中°不過’稀釋液B不一定 需要,如試料水A稀薄時,可K不要。 接下來,藉由容器搬蓮機構2將燒杯1 1轉動,就這 樣設定在試料注入站3上。在這裡注入作為氧化劑的二鉻· 酸鉀溶液2 C C及作為氧化促進劑的9 8 %硫酸1 5 C C 0 -6 * 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐) A7 B7 五、發明説明() 接下來,藉由容器搬運機構2將燒杯1 1轉動,並設 定在加熱站5上。在這裡燒杯1 1被載置在加熱塊5 1的 同時,並由鐵弗龍塞5 2塞注,將燒杯1 1内的液體Μ 1 〇 0 °C〜1 0 5 °C加熱3 0分〜2小時。 加熱终了時,燒杯1 1設定在電解液注入站6上,藉 由定量自動注入器6 0注入2 OCC的電解液,並搬運到 ^接下來的電量滴定站7。電量滴定裝置7 0能使電解電極 7 1及指示電極7 2,授拌装置7 3的前端部下降到燒杯 1 1內,以攪拌裝置73將燒杯1 1內的液體攪拌,同時 使設在電解電極7 1前端的露出電極7 4,7 5之間流通 2 4 · 5 m A的一定電流。藉由這個電流來進行電解液的 電解還原。在實設於指示電極7 2的前端的白金電極7 6 ,7 7之間流通1 m A的電流,而以指示電極兩端的電位 飛躍變成剌烈為終點,把到终點為止的電流量以微電腦7 8換算成化學需氧量(C 0 D )值,表示在數位顯示部7 9上。 經濟部中央標隼局員工消費合作杜印製 (讀先閱讀背面之注意事項再填寫本頁) 本案上述實施例,僅用Μ舉例說明本發明之一可行實 施例,對於熟悉該項技藝之人員,當可對其细部構造部份 進行各種等效之變化例,惟此等變化例,均應包括在本發 明之精神及範圍内。 -7 - $張尺皮適用中國國家標準(CNS ) A4^T2—10X297公295627 A7 B7 V. Description of the invention () Background of the invention: The present invention is a chemical oxygen demand (C 0 D) measuring device capable of automatically measuring the chemical oxygen demand (C 0 D) in drainage. Past Skills: According to the general chemical oxygen demand (C 0 D) is to use potent oxidants such as potassium permanganate, potassium dichromate, etc. to determine the amount of oxidant consumed when processing the sample water under certain conditions, It is converted into the amount of oxygen demand corresponding to this, and this indicates how much oxidized substance is present in the sample water. In the past, the measurement of chemical oxygen demand (C 0 D) used burettes, pipettes, foal pipettes, Erlenmeyer flasks, warm water baths and other instruments manually, so it has the disadvantage of taking a lot of time. In view of the above-mentioned problems and deficiencies of the prior art, the present invention has been carefully studied and continuously developed and researched, and finally a chemical oxygen demand measuring device has been developed. An object of the present invention is to provide a measuring device capable of automatically measuring chemical oxygen demand (COD) with good efficiency. Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the precautions on the back before filling in this page). Another object of the present invention is to provide a chemical oxygen demand measuring device. The sample liquid container provided in the outer box is transported by turning around the longitudinal worm, and the container carrying lotus mechanism capable of turning it up and down at a predetermined position, and the sample water or the sample water arranged around the container carrying mechanism The quantitative automatic injection mechanism for the diluent, the quantitative automatic injection mechanism for the gasification agent or the oxidation accelerator * the heating mechanism, the quantitative automatic injection mechanism for the electrolyte, the electric power titration mechanism, and the titration device with a drainage and washing mechanism, and the ability to control the aforementioned The container is moved to the lotus mechanism and the paper standard of the container is applied to the Chinese National Standard (CNS) A4 specification (210X297 mm) A7 5. Description of the invention () K # P, @ Μ The time set is set by the various institutions of the aforementioned titration. At the same time, the aforementioned drainage and washing device reverses the aforementioned container, and the control mechanism capable of activating each mechanism in synchronization with this Constitution. Another object of the present invention is to provide a chemical oxygen demand (COD) measuring device, which can automatically measure the chemical oxygen demand (C 0 D) by simply placing the sample water at a predetermined position in the outer tank. Therefore, the chemical oxygen demand (C ◦ D) can be continuously and automatically measured with good efficiency. In order for your reviewing committee to have a better understanding and understanding of the construction methods, devices and their functions described in the present invention, a preferred embodiment is described in detail in conjunction with the drawings as follows: Brief description of the drawings: The first picture This is a plan view showing the C 0 D measuring device. The second image shows a front view of the COD measuring device. The third figure is a schematic diagram of a quantitative automatic injector. The fourth diagram is not intended for quantitative automatic injectors. Figure 5 is a schematic diagram of the heating station. The sixth figure is a schematic diagram of a power titration device. The seventh image of the schematic diagram of draining and washing ° [Description of symbols] Du printed by the consumer cooperation of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page) 1 · Outer box 2 · Container handling structure \ j 3 .Sample injection station 44 .Oxidant injection station 5 · Heating station The paper size is applicable to the Chinese National Standard (CNS) A4 specifications (210X297 mm) A7 ________B7 V. Invention description () 6 * Electrolyte injection station 7 * Power Titration injection station 8 ♦ The first picture and second picture of the drainage and washing station show the chemical oxygen demand (C〇D) measurement device 100, in the outer box 1 make a beaker (container) 1 1 in The six titration devices (stations) arranged on the horizontal circumference of the titration device 200 are moved to facilitate the injection of sample water and dilution water, the injection of oxidants, oxidation accelerators, and other chemical liquids to heat the oxidation, After the electrolyte is injected, the amount of residual oxidant is titrated, and the chemical oxygen demand (COD) of the sample water is calculated. After draining, the beaker 11 is washed. The outer box 1 has a box shape, and a shed panel 12 is installed inside (refer to the second figure). A container transport mechanism 2 for transporting the beaker 11 is attached to the shelf plate 12. Under the shed plate 12, a distilled water container 13, a drain tank 14, a washing tank 15 and a vacuum pump 16 are housed. In addition, a fan 17 for ventilation is installed on the side wall of the outer box 1. Printed by the Ministry of Economic Affairs, Central Bureau of Standards, consumer cooperation cooperation (please read the precautions on the back before filling in this page) The container-lifting mechanism 2 has a support 2 1, a clamp 22 capable of holding the roasted cup 1 1, and a clamp capable of A rotating mechanism 23 with a motor M 1 that rotates around the support 2 1, a motor M 2 for raising and lowering the jig 22, a rotating shaft 24 with a screw thread, and a lifting member 25 screwed to the rotating shaft 24 The lifting mechanism 26, K and the rotating mechanism 27 of the clamp 2 2 holding the beaker 11. The clamp 2 2 can be turned around the support 2 1 by the control device 9Μ, while its wrist can also be rotated to turn the beaker 1 1 up and down The 6 stations (institutions) that make up the measuring device are installed on the pillar 2 1 week _ This paper scale is applicable to the Chinese National Standard Falcon (CNS) Α4 specification (210X297 mm) 205627 at B7 V. Invention description () of the shed 1 2 The first station is for the injection of sample water A and diluent (distilled water) B into the sample water injection station 3, which can suck 1 CC of sample water a and 9 CC of distilled water B into the quantitative automatic injector 30, and inject Beaker 11. As shown in the third figure, quantitative automatic injection The device 30 has a structure in which a driving mechanism 3 2 is attached to the manual finger dispenser 31. The second station is an oxidant injection station 4 for injecting an oxidant and an oxidation accelerator, and a dichromic acid as an oxidant is provided for injection The quantitative automatic injection of potassium solution 2 CC and the electric automatic burette for injecting 9 8% sulfuric acid 15 5CC as an oxidation accelerator 41. The quantitative automatic injector 40 has the same structure as the quantitative automatic injector 30. As shown in the fourth figure, the electric automatic burette 41 is formed by attaching an electric drive mechanism 43 to the manual automatic burette 42. The third station is the heating station 5, which is an electric heater shown in the fifth figure The gold tumbler heating block 51, a plug made of M Teflon material 52, a cooling water circulator 5 3 of Teflon plug 52, and an automatic lifting device 54 of Teflon plug 52, which can beaker 1 The liquid in 1 Ml 00 ° C ~ 1051 is heated for 30 minutes ~ 2 hours. Printed by the Beigong Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling in this page) The fourth station is electrolyte injection Station 6, with the same setting as the quantitative automatic injector 30 Quantum automatic injector 60 is injected with an electrolyte of 2 0 CC: As the electrolyte, iron (III) ions such as iron alum and ferrous sulfate are used. The fifth station is the electricity titration station 7, which is shown in the sixth figure. The electric power titration device 70. The electric power titration device 70 has an electrolytic electrode 7 1 and an indicator electrode 72, and a stirring device 73. At the front end of the electrolytic electrode 7 1 this paper standard is protrudingly applied to the Chinese National Standard (CNS) A4 specification (210X297 Mm) 5. Description of the invention () (please read the precautions on the back before filling in this page) The way out electrode 74 '75' has a platinum electrode protruding at the front end of the finger 72 72, 7 7. 7 8 It is a microcomputer that can detect the time until the residual oxidant M electrolysis electrode in the sample water a is electrolyzed to reach the original state, find the current amount and convert it to the chemical oxygen demand (C 0 D) value, which is expressed in On the digital display unit 79. The sixth station is drainage, and the washing station 8, as shown in the seventh figure, can turn the beaker 11 up and down to discharge the contents from the funnel 8 1 into the drainage tank 1 4. After that, the aforementioned vacuum pump 16 sucks the washing water (distilled water) from the washing water tank 15 and pours it out from the mouthpiece 8 2 into the beaker 11, and the distilled water B cleans the beaker 11. The control device 9 can control the container conveying device 2, the sample injection station 3, the oxidant injection station 4, the heating station 5, the electrolyte injection station 6, the power titration station 7 and the drainage and washing station 8. Printed by the Employee Consumer Cooperative of the Central Business Administration of the Ministry of Economic Affairs. The washed beaker 1 1 is held by the jig 2 2 of the container handling device 2 and was initially set on the sample injection station 3. Here, the sample water A 1 CC taken from the designated place and discharged into the vacuum container is sucked into the quantitative automatic injector 30 and poured into the beaker 11. Then 'the same distilled water B 9 CC as the diluent is drawn into the quantitative automatic injector 30 from the mouth of the dilution bottle and poured into the beaker 11 1 °°' but the diluent B is not necessarily required, such as the sample water A is thin, K . Next, the beaker 11 is rotated by the container-carrying lotus mechanism 2, and it is thus set on the sample injection station 3. Inject dichromium · potassium acid solution 2 CC as an oxidizing agent and 9 8% sulfuric acid as an oxidizing accelerator 1 5 CC 0 -6 * This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) A7 B7 5. Description of the invention () Next, the beaker 11 is rotated by the container conveying mechanism 2 and set on the heating station 5. Here, the beaker 11 is placed on the heating block 51, and the Teflon plug 52 is inserted to heat the liquid M 1 〇 0 ° C ~ 1 0 5 ° C in the beaker 1 1 30 minutes ~2 hours. At the end of heating, the beaker 11 is set on the electrolyte injection station 6, and 2 OCC of electrolyte is injected by the quantitative automatic injector 60, and then transferred to the next electric power titration station 7. The electric power titration device 70 can lower the front end of the electrolysis electrode 7 1 and the indicator electrode 7 2 and the mixing device 7 3 into the beaker 11, and the liquid in the beaker 11 is stirred by the stirring device 73 while making the electrolysis A constant current of 2 4 5 m A flows between the exposed electrodes 7 4 and 7 5 at the tip of the electrode 7 1. With this current, the electrolytic reduction of the electrolyte is carried out. A current of 1 m A flows between the platinum electrodes 7 6 and 7 7 that are mounted on the tip of the indicator electrode 7 2, and the potential jump at both ends of the indicator electrode becomes violent as the end point, and the amount of current up to the end point is The microcomputer 7 8 is converted into a chemical oxygen demand (C 0 D) value and displayed on the digital display unit 7 9. Du Printed by the Consumer Standard Cooperation Department of the Central Standard Falconry Bureau of the Ministry of Economy When various equivalent changes can be made to its detailed structure, these changes should be included in the spirit and scope of the present invention. -7-$ Zhang Chipi applies to China National Standard (CNS) A4 ^ T2—10X297

Claims (1)

ABCD 六、申請專利範圍 1 . 一種化學需氧量測定装置,係包含: 一外箱; 一容器搬運機構,其能夠使設置在該外箱內的試料詨 容器K迴繞縱铀轉動而搬運,並且在所定位置上能以上下 方向使其翻轉; 一配置在該容器搬運機構的周圔之試料水或稀釋液的 定呈自動注入據構 * 一氧化劑或氧化促進劏的定量自動注入機構; 一加熱機構; 一電解液定量自動注入機構; 一電還i.商定機構 ; 一具有排水、洗淨機構之滴定裝置;K及 一控制機構,用U控制該容器搬蓮機構而使該容器依 次以所定時間設定於各該注入機構及滴定機構,並且控制 該排水洗淨储搆使該容器翻轉,並且能夠使各馐搆同步作 動。 2 ·如申請專利範圍第1項所述之化學需氧量測定装 置,其中在申請項1中,在該外箱内設置棚板,在該棚板 上配置前述滴定装置,在該棚板下設置稀釋液槽,排水槽 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) ,電解液槽,及洗淨液槽。 本紙張尺度適用中國國家標準(CNS)A4規格P10 X 297公釐)ABCD VI. Patent application 1. A chemical oxygen demand measuring device, including: an outer box; a container transport mechanism, which enables the sample container K provided in the outer box to be rotated around the longitudinal uranium and transported, and It can be flipped up and down at a given position; a sample water or diluent that is arranged around the container transport mechanism is automatically injected into the structure; a quantitative automatic injection mechanism of oxidant or oxidation promoter; a heating mechanism; An electrolyte quantitative automatic injection mechanism; an electricity return i. An agreed mechanism; a titration device with a drainage and washing mechanism; K and a control mechanism, which controls the container carrying lotus mechanism with U to make the container set at a set time in turn For each of the injection mechanism and the titration mechanism, and controlling the drainage washing and storage mechanism to turn the container over, and to enable the various mechanisms to operate synchronously. 2) The chemical oxygen demand measuring device as described in item 1 of the patent application scope, wherein in application item 1, a shelf plate is provided in the outer box, the aforementioned titration device is arranged on the shelf plate, and under the shelf plate Set up the diluent tank, the drain tank is printed by the Employee Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page), the electrolyte tank, and the cleaning tank. (This paper scale is applicable to China National Standard (CNS) A4 specification P10 X 297 mm)
TW85106464A 1995-07-05 1996-05-30 TW295627B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16987895A JPH0921794A (en) 1995-07-05 1995-07-05 Measuring device for chemical oxygen demand

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TW295627B true TW295627B (en) 1997-01-11

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TWI384217B (en) * 2008-07-03 2013-02-01 Univ Nat Central Measurement method and system of water quality
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JP2007271335A (en) * 2006-03-30 2007-10-18 Chugoku Electric Power Co Inc:The Cod measuring system
JP4767064B2 (en) * 2006-03-30 2011-09-07 中国電力株式会社 COD measurement system and chloride ion removal apparatus used therefor
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI384217B (en) * 2008-07-03 2013-02-01 Univ Nat Central Measurement method and system of water quality
TWI651534B (en) * 2013-11-05 2019-02-21 東亞Dkk股份有限公司 Chemical oxygen demand (COD) automatic measuring device
CN108318647A (en) * 2017-01-18 2018-07-24 总翔企业股份有限公司 Water analysis equipment

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