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class="proimg_bk1"><a class="proimg1"><img src="http://img47.chem17.com/gxhpic_d55d0c909a/88c648add642a1ecfea11b1443e6904faa285b21bc30905db56e19cb57b5e02029f812add75ea364.jpg"/></a></div> </dt> <dd deep="3"> <div class="gljo9fygc" id="prod_gs" class="prod_gs"> <div id="gljo9fygc" class="prod_view_name"> <strong class="prod_view_name_bt">產(chǎn)品名稱：</strong> <b><h1 style="font-size: inherit"><span id="ShoveWebControl_Text3">工業(yè)自動分析儀cod消解器回流裝置使用</span></h1></b> </div> <div class="gljo9fygc" id="xn_c_prodv_26_wrap" class="xn_c_prodv_26_wrap"> <div id="gljo9fygc" class="xn_c_prodv_26_name" style="line-height: 36px;"> <span id="gljo9fygc" class="xn_c_prodv_26_namewz"><span name="_prodv_26_namewz">產(chǎn)品型號：</span></span> <span id="gljo9fygc" class="xn_c_prodv_26_namemc"><span id="xn_c_prodv_26_Text1">COD-100</span></span> </div> <div id="gljo9fygc" class="xn_c_prodv_26_name" style="line-height: 36px;"> <span id="gljo9fygc" class="xn_c_prodv_26_namewz"><span name="_prodv_26_namewz">產(chǎn)品時間：</span></span> <span id="gljo9fygc" class="xn_c_prodv_26_namemc"><span id="xn_c_prodv_26_Text1">2024-07-13</span></span> </div> </div> <div class="gljo9fygc" id="prod_view_ms" class="prod_view_ms"><span id="ShoveWebControl_Text7">工業(yè)自動分析儀cod消解器回流裝置使用：</br>COD-100型COD自動消解回流儀遵循了標準（ISO）和國家標準（GB）的基本原則，保證回流加熱2小時的消解操作，確保分析結果的準確性。儀器采用微機技術進行定時控制加熱電爐，可對6個消解器瓶回流裝置同時進行加熱。從而達到節(jié)能增效的目的。該儀器采用玻璃玻璃毛刺回流管代替球形回流管，并以風冷技術取代水冷，從而提高儀器的穩(wěn)定性和安全性。</span></div> </div> <p></p> </dd> </dl> <div id="gljo9fygc" class="main_top3"><p>產(chǎn)品介紹</p></div> <div id="gljo9fygc" class="product1 pro_1"> <p><span style="font-size:16px"><span style="font-family:黑體"><strong>工業(yè)自動分析儀cod消解器回流裝置使用</strong>技術參數(shù)：</span></span></p><p style="text-align:justify"><span style="font-size:16px"><span style="font-family:黑體">測量范圍：0-1000mg/L、0-10000mg/L（水樣稀釋）</span></span></p><p style="text-align:justify"><span style="font-size:16px"><span style="font-family:黑體">測量時間：不大于2小時</span></span></p><p style="text-align:justify"><span style="font-size:16px"><span style="font-family:黑體">測量誤差：鄰苯二甲酸氫鉀標準溶液（500mg/L)：相對標準偏差不大于5.0%；</span></span></p><p style="text-align:justify"><span style="font-size:16px"><span style="font-family:黑體">工業(yè)有機廢水（500mg/L)：相對標準偏差不大于8%</span></span></p><p style="text-align:justify"><span style="font-size:16px"><span style="font-family:黑體">環(huán)境溫度：5-45℃</span></span></p><p style="text-align:justify"><span style="font-size:16px"><span style="font-family:黑體">加熱功率：1500w</span></span></p><p style="text-align:justify"><span style="font-size:16px"><span style="font-family:黑體"><img alt="" src="https://img48.chem17.com/gxhpic_d55d0c909a/4c6de04c44fd79c3d690db585ec0c099b07a282b12441e117574f530c03fd5f39a85d9a1c15bfe09.jpg" style="height:450px; width:337px" /></span></span></p><p style="text-align:justify"><span style="font-size:16px"><span style="font-family:黑體"><strong>工業(yè)自動分析儀cod消解器回流裝置使用</strong>性能特點：</span></span></p><p style="text-align:justify"><span style="font-size:16px"><span style="font-family:黑體">可以設定消解時間，消解完畢后，儀器自動停止加熱，可無人看管。</span></span></p><p style="text-align:justify"><span style="font-size:16px"><span style="font-family:黑體">樣品消解完畢后，儀器風機繼續(xù)工作半小時，輔助樣品冷卻。</span></span></p><p style="text-align:justify"><span style="font-size:16px"><span style="font-family:黑體">節(jié)約用電、用水，提高了效率，增強了儀器的安全性。</span></span></p><p style="text-align:justify"><span style="font-size:16px"><span style="font-family:黑體"><strong style="line-height:1.6em">步驟</strong></span></span></p><p><span style="font-size:16px"><span style="font-family:黑體"><strong style="line-height:1.6em">1</strong><span style="line-height:1.6em"> 對于COD值小于50mg/L的水樣，應采用低濃度的重鉻酸鉀標準溶液（4.5.2）氧化，加熱回流以后，采用低濃度的硫酸亞鐵銨標準溶液（4.6.4）回滴。</span></span></span></p><p><span style="font-size:16px"><span style="font-family:黑體"><strong>2</strong> 該方法對未經(jīng)稀釋的水樣其測定上限為700mg/L，超過此*必須經(jīng)稀釋后測定。</span></span></p><p><span style="font-size:16px"><span style="font-family:黑體"><strong>3 </strong> 對于污染嚴重的水樣，可選取所需體積1/10的試料和1/10的試劑，放入10*150 mm硬質玻璃管中，搖勻后，用酒精燈加熱至沸數(shù)分鐘，觀察溶液是否變成藍綠色。如呈藍綠色，應再適當少取試料，重復以上試驗，直至溶液不變藍綠色為止。從而確定待測水樣適當?shù)南♂尡稊?shù)。</span></span></p><p><span style="font-size:16px"><span style="font-family:黑體"><strong>4</strong> 取試料（6.2）于錐形瓶中，或取適量試料加水至20.0Ml。</span></span></p><p><span style="font-size:16px"><span style="font-family:黑體"><strong>5 </strong> 空白試驗：按相同步驟以20.0mL代替試料進行空白試驗，其余試劑和試料測定（7.8）相同，記錄下空白滴定時消耗硫酸亞鐵銨標準溶液的毫升數(shù)V<sub>1</sub>。</span></span></p><p><span style="font-size:16px"><span style="font-family:黑體"><strong>6 </strong> 校核試驗：按測定試料（7.8）提供的方法分析20.0m L鄰苯二甲酸氫鉀標準溶液（4.7）的COD值，用以檢驗操作技術及試劑純度。</span></span></p><p><span style="font-size:16px"><span style="font-family:黑體">該溶液的理論COD值為500mg/L，如果校核試驗的結果大于該值的96%，即可認為實驗步驟基本上是適宜的，否則，必須尋找失敗的原因，重復實驗，使之達到要求。</span></span></p><p><span style="font-size:16px"><span style="font-family:黑體"><strong>7</strong> 去干擾試驗：無機還原性物質如亞硝酸鹽、硫化物及二價鐵鹽將使結果增加，將其須氧量作為水樣COD值的一部分是可以接受的。</span></span></p><p><span style="font-size:16px"><span style="font-family:黑體">該實驗的主要干擾物為氯化物，可加入硫酸汞（4.2）部分地除去，經(jīng)回流后，氯離子可與硫酸汞結合成可溶性的氯汞絡合物。</span></span></p><p><span style="font-size:16px"><span style="font-family:黑體">當氯離子含量超過1000mg/L時，COD的最低允許值為250mg/L，低于此值結果的準確度就不可靠。</span></span></p><p><span style="font-size:16px"><span style="font-family:黑體"><strong>8 </strong>水樣的測定：于試料（7.4）中加入10.0mL重鉻酸鉀標準溶液（4.5.1）和幾顆防爆沸玻璃珠（4.9），搖勻。</span></span></p><p><span style="font-size:16px"><span style="font-family:黑體">將錐形瓶接到回流裝置（5.1）冷凝管下端，接通冷凝水。從冷凝管上端緩慢加入30mL硫酸銀-硫酸試劑（4.4），以防止低沸點有機物的逸出，不斷旋動錐形瓶使之混合均勻。自溶液開始沸騰起回流兩小時。</span></span></p><p><span style="font-size:16px"><span style="font-family:黑體">冷卻后，用20～30mL水自冷凝管上端沖洗冷凝管后，取下錐形瓶，再用水稀釋至140mL左右。</span></span></p><p><span style="font-size:16px"><span style="font-family:黑體">溶液冷卻至室溫后，加入3滴1，10-菲繞啉指示劑溶液（4.8），用硫酸亞鐵銨標準滴定溶液（4.6）滴定，溶液的顏色有黃色經(jīng)藍綠色變?yōu)榧t褐色即為終點。記下硫酸亞鐵銨標準滴定溶液的消耗毫升數(shù)V<sub>2</sub>。</span></span></p><p><span style="font-size:16px"><span style="font-family:黑體"><strong>9 </strong>在特殊情況下，需要測定的試料在10.0mL到50.0mL之間，試劑的體積或重量按表1作相應的調整。</span></span></p><p style="text-align:justify"><span style="font-size:16px"><span style="font-family:黑體"><img alt="" src="https://img49.chem17.com/gxhpic_d55d0c909a/4c6de04c44fd79c3d690db585ec0c099262d1c1d4fbea24a5f02e284f3bd4414a3f8a994e847b9d8.jpg" style="height:1066px; width:800px" /></span></span></p><p><span style="font-size:16px"><span style="font-family:黑體"><img alt="" src="https://img48.chem17.com/gxhpic_d55d0c909a/1612f01f3bc0aaed859a56f7f0f94177551ce962df2873ef0ea7a2c06665b368e0bded9225c431cb.jpg" style="height:513px; width:790px" /></span></span></p><p><span style="font-size:16px"><span style="font-family:黑體">1、以上所述產(chǎn)品規(guī)格、圖片、資訊等僅供參考,如有更新, 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