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href="/article.html">技術(shù)文章</a> > <span>淺析鹽度對溶氧儀測定值的影響</span></p> </div>   <div id="pci9wne" class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">淺析鹽度對溶氧儀測定值的影響</h1> <div id="c338gms" class="NyNewsdetail_tips">更新時(shí)間：2021-06-15 點(diǎn)擊次數：1205</div> <div id="3e898h3" class="NyNewsdetail_con"> <div>　　氧是大氣組成的主要成分之一，地面水敞露于空氣中，因而清潔的地面水中所含的溶解氧值常接近于飽和狀態(tài)。在水中有大量藻類(lèi)繁殖時(shí)，由于植物的光合作用而方出氧，有時(shí)甚至可以含有飽和的溶解氧。如果水體被易于氧化的有機物污染，那么，水中所含溶解氧值就會(huì )減少。當氧化作用進(jìn)行的太快，而水體又不能從空氣中吸收氧氣來(lái)補充氧的消耗，溶解氧值不斷減少，有時(shí)甚至會(huì )接近于零。在這種情況下，厭氧細菌繁殖并活躍起來(lái)，有機物發(fā)生腐敗作用，水體產(chǎn)生臭味。因此，溶氧儀測定對于了解水體的自?xún)糇饔?，有極其重要的關(guān)系。在一條流動(dòng)的河水中，取不同地段的水樣來(lái)測定溶解氧值?？梢詭椭私庠撍w在不同地點(diǎn)所進(jìn)行的自?xún)糇饔们闆r。<br /> </div><p align="center"><img src="https://img76.chem17.com/9/20210615/637593742398194824705.jpg" alt="溶氧儀" width="500" height="426" align="middle" /></p><p> </p><div>　　在相同的溫度下，水中飽和溶解氧值，隨著(zhù)水中鹽份濃度增加而減少。水中鹽的濃度單位是克/升(g/L)。在不同溫度下，相同濃度的鹽度對溶解氧影響的系數不一樣，略有差異。在一般水樣測量時(shí)，不需要進(jìn)行鹽度校準，但在海水或海水養殖場(chǎng)等鹽度較高的場(chǎng)合，測量溶解氧值時(shí)，應該進(jìn)行鹽度校準。<br /> </div><div>　　沒(méi)有鹽度自動(dòng)補償的<a href="http://www.tianhualian.com.cn/ParentList-432782.html" target="_blank">溶氧儀</a>。一般是利用比重計(或其他方法)先測量海水的比重將其換算成鹽度(單位：ppt在表示鹽度是為千分之一含義即g/L)再進(jìn)行鹽度校準。</div> </div> <div id="xiojvr3" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/Article-2687221.html">分享一下！一體防爆電導率儀的選購要點(diǎn)</a></li> <li>下一篇：<a href="/Article-2672135.html">EC3200電導率分析儀常見(jiàn)故障分析</a></li> </ul> </div> </div>   <div id="gokvgmv" class="ly_foot"> <div id="fn3vyea" class="ly_Ftmain"> <div id="zmcsjuq" class="ly_FtLeft"> <div id="n84pabc" class="Ft_nav"><a href="/">首頁(yè)</a><a href="/aboutus.html" target="_blank">關(guān)于我們</a><a href="/products.html" target="_blank">產(chǎn)品展示</a><a href="/news.html" target="_blank">新聞中心</a><a href="/article.html" target="_blank">技術(shù)文章</a><a 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