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當前位置:首頁技術文章輕質餾份油中總氯的測定

輕質餾份油中總氯的測定

更新時間:2014-02-27點擊次數:3062

本方法適用于測定在常溫下可用微量注射器進樣的輕質餾份油和相應的石油產品中總氛含量。
             一、方法原理
            分析試樣用微量注射器注入石英燃燒管與氧氣一道燃燒,樣品中有機氯轉化為氯離子,并由載氣帶入滴定池。
            滴定池有由參考電極和指示電極組成的測量電極對及電解陽極和陰極組成的電解電極對;滴定池與庫侖放大器組成閉環自控系統,滴定池中保持恒定的銀離子濃度,進入滴定池的氯離子與銀離子發生反應:
                                         Ag++C1— → AgCl ↓
            滴定池中銀離子濃度降低,測量電極對指示出這一變化,并將這一變化信號輸送給微庫侖放大器,并由放大器輸出一個相應的電壓作用于電解陽極,電生銀離子,使滴定池恢復初始的銀離子濃度。測量電生銀離子所消耗電量,根據法拉弟電解定律即可求出相應樣品中的氯合量。

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