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src="/skins/290838/images/position.png" />當(dāng)前位置：<a href="/">首頁</a> > <a href="/article.html">技術(shù)文章</a> > BOD測定儀的注意事項 </div> </div> <div id="m0wuomu" class="ny_content_bd"> <div id="m0wuomu" class="w1200 clear"> <div id="m0wuomu" class="ny_newsdetail clear"> <h1 class="ny_newsdetail_title">BOD測定儀的注意事項 </h1> <div id="m0wuomu" class="ny_newsdetail_tips">更新時間：2015-01-26 | 點擊率：2598</div> <div id="m0wuomu" class="ny_newsdetail_con"> 　操作<strong><a href="http://www.qdjlst.com/">BOD測定儀</a></strong>時的注意事項：<div>　?、?內(nèi)充液在連續(xù)使用一個星期左右應(yīng)及時更換。</div><div>　?、?各連線接觸保持良好，否則儀器不能正常工作(無終點等)。</div><div>　　③ 電極鉑片應(yīng)保持光亮，長期使用若附有氯化銀等化合物，可使用1+3硝酸于消解杯內(nèi)浸洗后并用蒸餾水洗凈。如電極長期不用可置于干凈無任何液體的消解杯內(nèi)。</div><div>　 <strong>BOD測定儀</strong>使用時的注意事項</div><div>　?、?strong>BOD測定儀</strong>在電解過程中如進(jìn)行功能切換及參數(shù)輸入，儀器不會響應(yīng)。</div><div>　　⑵ 如測定過程發(fā)現(xiàn)空白COD值明顯偏低，一般都是試劑或蒸餾水純度較低，須仔細(xì)分析，逐一排除。</div><div>　?、?電解電流換檔使用時，會造成終點差異，*個數(shù)據(jù)可舍去。</div><div>　?、?在電解過程中，由于<strong>BOD測定儀</strong>外部中斷方式對強(qiáng)電源的波動有產(chǎn)生誤終點的可能，如發(fā)現(xiàn)信號-時間曲線不是正常終點判斷，即可按一下“確認(rèn)”鍵切斷電解，再按一下“啟動”鍵，使其繼續(xù)電解至終點，zui終結(jié)果為二次測定結(jié)果之和。</div><div>　?、?在樣品測量時，如果結(jié)果COD值顯示EE-1，表示空白值不夠減，應(yīng)適當(dāng)減少取樣量。</div><div>　　⑹ 器皿不干凈，易造成實驗結(jié)果有較大誤差及重現(xiàn)性不理想。因此，實驗前所有器皿應(yīng)放在鉻酸洗液中浸泡24 h以上，然后用水沖洗干凈，再在消解杯中放入20mL蒸餾水，20mL濃硫酸和10mL0.05mol/L重鉻酸鉀溶液加熱回流2 h，再用30mL蒸餾水從冷凝管上端沖洗干凈，置于干凈容器內(nèi)蓋好待用。</div> </div> <div id="m0wuomu" class="ny_PrevNext"> <div id="m0wuomu" class="Prev">上一篇： <a href="/Article-750010.html">PH酸度計的主要構(gòu)成部件</a></div> <div id="m0wuomu" class="Next">下一篇： <a href="/Article-746858.html">2100Q濁度儀為你提供穩(wěn)定、準(zhǔn)確的測量結(jié)果</a></div> </div> </div> </div> </div> </div>   <div id="m0wuomu" class="pc_foot"> <div id="m0wuomu" class="pc_ft_main w1200 clear"> <div id="m0wuomu" class="ft_list"> <ul> <li><b>關(guān)于我們</b><a 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