银河仪器直读式BOD5测定�?参数-价格-中国粉体罐�/title>

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} }); function showliuyan(me, showtype){ if(showtype==0){ //$("#Content").val($("#Content").attr('placeholder')); Content= document.getElementById('PopMsgFrom').Content.getAttribute('placeholder'); document.getElementById('PopMsgFrom').Content.value=Content; } if(showtype==1){ // $("#Content").val($(me).text()); alert($(me).text()); document.getElementById('PopMsgFrom').Content.value=$(me).text(); } $(".fxp").css("display","flex"); } function close_popwin(){ $(".fxp").css("display","none"); // 关闭虚拟电话后的留言� $(".dhxj").css("display","none"); $(".dhxjbox").css("display", "none"); $(".dhxjbox2").css("display", "none"); return false; } </script>  <div class="cpjs"> <div class="cpjs_tab"> <div class="js_cpjj" style="border-bottom: 3px solid #1479d7; color: #1479d7;">产品介绍</div> <div class="js_cxd">创新炸�/div> <div class="js_xgfa">相关方案</div> <div class="js_xgzl">相关资料</div> <div class="js_yhpl">用户评论</div> <div class="js_gsdt">公司动�?/div> <div class="js_wsj">问商宵�/div> </div> <script> $(function(){ // 切换 $(".cpjs_tab a").click(function(){ $(".cpjs_tab a").css({"color":"#4F5862","border-bottom-color":"transparent"}); $(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <p>870型直读式BOD5测定仪是利用空气压差法进行生化需氧量测定的一种新型仪器，其操作简单，能提供与化学稀释法可比的准确测量结果，读数直观，使用和维护方便�?70型直读BOD5测定仪广泛应用于环保监测、石油化工、医疗卫生、教学科研等部门对水质的监测，是广大分析工作者的有力工具、�/p><p>使用870型直读BOD5测定�?将预先选好量程并按量程范围量好体积的水样倒入培养瓶中，在BOD5测定仪主机搅拌器上连续搅拌。并将主机和培养瓶放入培养箱中。调节培养箱内温度为20℃�?℃，待样品恒温后进行五日培养。培养瓶中的水样在连续搅拌的情况下保证了足够的溶解氧供微生物进行生化反应。水样中的有机物经过生物氧化作用，转变成氮、碳和硫的氧化物。在这一过程中，从水样中溢出�?气体二氧化碳被氢氧化钠（或氢氧化钾）吸收。此时，培养瓶中空气压力减少量，相当于微生物所消耗的溶解氧含量，即水样BOD5值与瓶中空气压力减少的程度成正比，所以BOD5的值可以由空气压力减少值来测定，增加或减少所取样品的量可以增加或降低压力减少值。这样操作者就能准确测量很宽范围的BOD5值。培养瓶中空气压力的变化是通过压力计中汞柱高度的变化来进行检测的，通过简单的计算即能读出水样的BOD5值、�/p><p>870型直读式BOD5测定仪环境条件和主要技术指栆�/p><p> 1 、环境温度：0℃～40ℂ�/p><p> 2 、测定方法：差压泔�/p><p> 3 、测量范围：0mg/L�?000mg/L（BOD5值超过测量范围时需要稀释）</p><p> 4 、批处理量：每次8份水栶�/p><p>5 、准 确度：符合国标“GB7488-87"标准规定</p><p>（葡萄糖谷氨酸标液BOD5值在180mg/L�?30mg/L范围内）</p><p>6 、显 示：从压力计刻度尺上可直读出样品BOD5值（mg/L（�/p><p>7 、培养温度：20℃�?ℂ�/p><p>8 、电 源：交流36V</p><p>9 、主机尺寸：400mm×270mm×350mm</p><p>10、主机重量：5kg</p><p>11、功 耗：仪器18W</p><p><br/></p> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; 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