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<strong>便攜式氨氮測定儀快速地測定出水中氨氮濃度</strong> </p> <p style="color:#333333;font-family:"font-size:16px;background-color:#FFFFFF;"> <strong>LB</strong><strong>-2AZ 便攜</strong><strong>式氨氮檢測儀</strong><strong></strong> </p> <p style="color:#333333;font-family:"font-size:16px;background-color:#FFFFFF;"> <strong><img src="https://cos3.solepic.com/20210223/b_4170889202102231240122805.png" /></strong> </p> <strong> <p> 氨氮是指以銨(NH4+)或氨(NH3)離子形式存在的化合氨，是水體受到污染的標志，也是各類(lèi)型氮中危害影響大的一種形態(tài)，其對水生態(tài)環(huán)境的危害表現在多個(gè)方面。氨氮也是水體中的主要耗氧污染物，氨氮氧化分解消耗水中的溶解氧，使水體發(fā)黑發(fā)臭。氨氮中的非離子氨是引起水生生物毒害的主要因子，對水生生物有較大的毒害！ </p> <p> 根據納氏試劑分光光度法，輔以樣品比色反應預處理，能靈敏、穩定、快速地測定出水中氨氮濃度。以游離態(tài)的氨或銨離子等形式存在的氨氮與鈉氏試劑反應生成黃棕色絡(luò )合物，該絡(luò )合物的色度與氨氮的含量成正比。本儀表應用微電腦光電子比色檢測原理取代傳統的目視比色法。消除了人為誤差，因此測量分辨率大大提高。氨氮測定儀測定氨氮非常簡(jiǎn)單，但在實(shí)際測量過(guò)程中用戶(hù)還需注意了：1、對于污染嚴重的水樣，特別是工業(yè)污染源的水樣，可選取所需體積的1/10的試料和1/10的試劑，放入10×150mm的硬質(zhì)玻璃試管中，用酒精燈加熱至沸數分鐘，觀(guān)察溶液是否變?yōu)樗{綠色，若呈現藍綠色的話(huà)，應再適當的少取試料，重復以上實(shí)驗，直至溶液不再變藍綠色為止。以此確定待測水樣合理的稀釋倍數。稀釋時(shí)，所取廢水樣量不得少于5mL，如果化學(xué)需氧量很高（如工廠(chǎng)車(chē)間廢水），則廢水樣應多次稀釋。2、水樣的氧化回流應該在通風(fēng)櫥內進(jìn)行，以防Cl?之類(lèi)的有害氣體妨礙操作人員的健康。3、在標準方法中，回流溫度為145～148℃，冷卻水的流量應控制在用手觸摸冷凝管外壁不能有溫感，否則水樣中的低沸點(diǎn)有機物也會(huì )揮發(fā)損失，使測定結果偏低。水樣回流消解結束后，加入蒸餾水或去離子水應從冷凝管上方緩慢加入，以便將附著(zhù)在管內壁的揮發(fā)性有機物沖到試液中。在使用閉管催化-氧化法快速處理水樣時(shí)，也應在加熱完畢后，趁熱顛倒管內水樣，使得氣相中的有機物參與氧化反應。 </p> <p> <strong>LB</strong><strong>-2AZ 便攜</strong><strong>式氨氮檢測儀</strong><strong></strong> </p> <p> <strong><img src="https://cos3.solepic.com/20210223/b_4170889202102231240122805.png" /></strong> </p> <strong> <p> 產(chǎn)品介紹 </p> <p> 適用于大、中、小型水廠(chǎng)及工礦企業(yè)、生活或工業(yè)用水的氨氮濃度檢測，以便控制水的氨氮達到規定的水質(zhì)標準。 </p> <p> 產(chǎn)品原理 </p> <p> 本儀器應用微電腦光電子比色檢測原理取代傳統的目視比色法。消除了人為誤差，因此測量分辨率大大提高。 </p> <p> 技術(shù)參數 </p> <p> 測量范圍：0-10mg/L </p> <p> 最小示值：0.01mg/L </p> <p> 重復性：≤2% </p> <p> 精度：≤±5%FS </p> <p> 電源電壓：DC 9V </p> <p> 產(chǎn)品特點(diǎn)： </p> <p> 1.微電腦，輕觸式鍵盤(pán)，LCD液晶數字清晰顯示，使用方便。 </p> <p> 2.采用分光光度的光電比色原理，應用方便試劑，水樣放入試劑反應后幾分鐘即可讀數，數字顯示測定值。 </p> <p> 3.本公司特制的專(zhuān)利技術(shù)LED光源自動(dòng)控制電路，光源穩定，解決了開(kāi)機必須預熱問(wèn)題。其光源壽命長(cháng)達20年，開(kāi)機時(shí)無(wú)需預熱，可直接使用。 </p> <p> 4.主機內置大功率電池，可用于野外現場(chǎng)定量測量，充電2小時(shí)可連續使用4小時(shí)，即充即用。 </p> <p> 5.儀器內存儲有全量程范圍內的標定曲線(xiàn) ，具有斷電保護，標定數據不會(huì )丟失?？勺詣?dòng)調零和5點(diǎn)自動(dòng)校正，數據有非線(xiàn)性處理及數據平滑功能，儀表最小讀數為0.01mg/L。 </p> <p> 6.融合多項自主設計專(zhuān)利成果，技術(shù)先進(jìn)，符合國標GB/T5750-2006生活飲用水衛生標準。 </p> </strong></strong> </div> <div id="fvkfg1sxx" class="pge_re"> <span>上一篇：<a href="/news/show456870.html">COD氨氮測定儀這七點(diǎn)日常維護不能出錯</a></span> <span>下一篇：<a href="/news/show456877.html">COD測定儀檢測化學(xué)需氧量時(shí) 怎樣避免干擾因素</a></span> </div> <style type="text/css"> .news_tag{margin-top:10px;} 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