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class="sc_ipt"><input type="text" name="keyword" placeholder="請輸入產(chǎn)品名稱(chēng)" maxlength="50" /></div> <div id="8xelhij" class="sc_btn"><input type="submit" value="搜索" /></div> <div id="fxdefmd" class="clear"></div> </form> </div> <div id="jhdooz8" class="clear"></div> </div> </div>  <script src="http://www.chem17.com/mystat.aspx?u=sanbon"></script>  <div id="f8o9sjk" class="ly_crumb"> <img src="/skins/170979/images/crumb_icon.png" /><p>當前位置：<a href="/">首頁(yè)</a> > <a href="/article.html">技術(shù)文章</a> > <span>氧電極的注意事項</span></p> </div>   <div id="8q8e2ht" class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">氧電極的注意事項</h1> <div id="diuqri8" class="NyNewsdetail_tips">更新時(shí)間：2011-05-04 點(diǎn)擊次數：3193</div> <div id="9slcyea" class="NyNewsdetail_con"> 　　1.進(jìn)行電極的校正時(shí)，一定要蓋上反應杯的蓋子，特別是做無(wú)氧線(xiàn)時(shí)更應當注意。<br />　　2.轉子的轉速影響到信號線(xiàn)的穩定性，對于不同的測定條件應當根據信號線(xiàn)是否平穩調節轉子的轉速。<br />　　3.測定切碎的組織時(shí)，組織的碎塊不宜過(guò)大，并且碎塊大小要盡量均勻一致，否則信號線(xiàn)不穩定。<br />　　4.氧電極對溫度變化非常敏感，測定時(shí)需維持溫度恒定。如果反應杯中出現氣泡，則表明溶液尚未與測試條件下的環(huán)境溫度達到平衡。<br />　　5.反應杯中不應有氣泡，否則會(huì )造成信號不穩，有經(jīng)常性的隨機干擾，使記錄線(xiàn)扭曲。因為氣泡中的含氧量比水中高20多倍，反應杯中有氣泡時(shí)溶液中的氧就會(huì )擴散到氣泡或氣泡中的氧擴散到溶液中，結果會(huì )造成電極反應遲純?？瞻诇y定時(shí)，信號會(huì )出現緩慢漂移。<br />　　6.電極使用一段時(shí)間后（一周左右），在陽(yáng)極（銀極）上會(huì )形成一層氧化膜，使電極的靈敏度下降，需要用清潔劑清潔陽(yáng)極。清潔電極時(shí)，用棉棒蘸少許清潔劑，于銀極上來(lái)回擦拭，直到銀極潔亮為止，然后用蒸餾水沖洗干凈。注意：清潔電極時(shí)一定不要用鋒利的器具劃傷電極。7.操作過(guò)程中必須注意實(shí)驗中空氣組成的變化和干擾氣體（H2S、SO2、CO2等）的影響，以及氣壓的變化和溫度的突變。測定前還應注意洗凈反應杯，以消除在反應杯中的霉菌或細菌的影響。<br />　　8.由于反應杯中的溶液體積要參與耗/放氧速率的計算，因此每次測定時(shí)一定要準確加入定量的液體，如果要在液體中加入固體樣品，加入樣品后，調節電極室上的旋鈕，使溶液剛好進(jìn)入旋鈕中的小孔中，使反應杯中無(wú)氣泡。不可將旋鈕旋得過(guò)深使反應杯中的溶液從小孔中溢出而影響測定液的體積。<br />　　9.用注射器向反應杯中加溶液（小樣品、抑制劑或激活劑）時(shí)，應注意針頭和注射器中的樣品溶液無(wú)氣泡。使用的注射器針頭不要過(guò)長(cháng)，以免損壞電極膜。<br />　　10.由于磁轉子比較小，清洗反應杯時(shí)，注意不要將磁轉子倒掉。<br />　　上海三本環(huán)?？萍加邢薰臼巧虾；ぱ芯吭合聦黉N(xiāo)售公司及技術(shù)服務(wù)中心，上?；ぱ芯吭菏窃O計和制造水質(zhì)分析儀、氣體檢測、自動(dòng)化儀表及PAC編程的專(zhuān)業(yè)廠(chǎng)家。提供：溶氧儀,<a href="http://www.tianhualian.com.cn/" 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