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id="npwpg7c" class="proBig"><div id="mgsjaw7" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988246893719/5353894.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="7iofw8s" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988246893719/5353894.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="wj3xmdu" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>中端原子吸收分光光度計儀器,原子吸收分光光度計</p><p><span>***更新：</span>2021-01-29 02:12:13</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="vym289y" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海儀電分析儀器有限公司</a></p><p><span>聯(lián)系人：</span>薛馬駿</p><p><span>郵箱: </span>ydfxwx@qq.com</p><p><span>電話: </span>18001994173</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.inesa-a.com</p><p><span>手機: </span>021-34530361</p><p><span>地址: </span>徐塘路88號7幢4層、9幢</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="ayarntf" class="page-proshow02"><p class="title">詳細說明</p><div id="3pi3zpg" class="box"><p><p style="text-indent:25px">目前原子吸收法已用來測定地質(zhì)樣品中70多種元素，并且大部分能夠達到足夠的靈敏度和比較好的精密度，中端原子吸收分光光度計儀器。鋼鐵、合金和高純金屬中多種痕量元素的分析現(xiàn)在也多用原子吸收法。原子吸收在食品分析中越來越普遍。食品和飲料中的20多種元素已有滿意的原子吸收分析方法。生化和臨床樣品中必需元素和有害元素的分析現(xiàn)已采用原子吸收法。有關(guān)石油產(chǎn)品、陶瓷，中端原子吸收分光光度計儀器、農(nóng)業(yè)樣品、藥物和涂料中金屬元素的原子吸收分析的文獻報道近些年來越來越多，中端原子吸收分光光度計儀器。水體和大氣等環(huán)境樣品的微量金屬元素分析已成為原子吸收分析的重要領(lǐng)域之一。利用間接原子吸收法尚可測定某些非金屬元素。原子吸收分光光度計主要用于痕量元素雜質(zhì)的分析。中端原子吸收分光光度計儀器</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="中端原子吸收分光光度計儀器,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988246893719/5353894.png"></div><p style="text-indent:25px">石墨爐原子化器相對于火焰原子化器具有體積小、檢出限低用樣量少等特點；石墨爐原子化的缺點主要是基體蒸發(fā)時可能造成較大的分子吸收，爐管本身的氧化也產(chǎn)生分子吸收，背景吸收較大，一些固體微粒引起光散射造成假吸收，因此使用石墨爐原子化器必須使用背景校正裝置校正。石墨爐原子化器主要包括爐體、電源、冷卻水、氣路系統(tǒng)等，目前商品儀器的爐體又分為縱向加熱和橫向加熱?？v向加熱石墨爐（國產(chǎn)儀器的石墨爐體多為縱向加熱）由于要在石墨管兩端的電極上進行水冷，造成沿光路方向上存在溫度梯度，使整個石墨管內(nèi)具有不等溫性導(dǎo)致基體干擾嚴重，影響原子化過程。針對上述問題，商品儀器經(jīng)過多次的改進，又發(fā)展了平臺原子化（在改善縱向石墨爐加熱方面有比較大的貢獻）、探針原子化、電容放電強脈沖加熱石墨爐，這些技術(shù)都在一定程度上或多或少地彌補了縱向加熱的缺點，但還是沒有解決根本問題。而橫向加熱石墨爐技術(shù)恰恰能解決縱向的不等溫性的缺點，它較大增加了管內(nèi)恒溫區(qū)域，降低原子化溫度和時間，使得原子濃度均勻且穩(wěn)定性好，明顯地降低基體效應(yīng)和消除記憶效應(yīng)，同時還可降低對爐體的要求，增加了石墨管的使用壽命。司法檢測原子吸收分光光度計多少錢原子吸收光譜分析，由于其靈敏度高、干擾少、分析方法簡單快速。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="中端原子吸收分光光度計儀器,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988150712025/4463747.png"></div><p style="text-indent:25px">火焰原子化器火焰原子化包括兩個步驟:先將試樣溶液變成細小霧滴（即霧化階段），然后使霧滴接受火焰供給的能量形成基態(tài)原子（即原子化階段）。火焰原子化器由霧化器、預(yù)混室和燃燒器等部分組成。嘛余霧化器的作用是將試液霧化成微小的霧滴。霧化器的性能會對靈敏度、測量精度和化學(xué)干擾等產(chǎn)生影響，因此要求其噴霧穩(wěn)定、霧滴細微均勻和霧化效率高。目前，商品原子化器多數(shù)使用氣動型霧化器。塑預(yù)混室也稱霧化室，其作用是進一步細化霧滴，并使之與燃料氣均勻混合后進入火焰。燃燒器的作用是使燃氣在助燃氣的作用下形成火焰，使進入火焰的試樣微粒原子化。原子吸收光譜分析較常用的火焰是空氣-乙炔火焰和氧化亞氮（笑氣）-乙炔火焰。當采用不同的燃燒氣時，應(yīng)注意調(diào)整燃燒器的狹縫寬度和長度以適應(yīng)不同燃燒氣的燃燒速率，防止回火爆開。由于火焰原子化法的操作簡便，重現(xiàn)性好，有效光程大，對大多數(shù)元素有較高靈敏度，因此應(yīng)用普遍。但火焰原子化法原子化效率低，靈敏度不夠高，而且一般不能直接分析固體樣品。火焰原子化法這些不足之處，促使無火焰原子化法的發(fā)展。</p><p style="text-indent:25px">原子吸收分光光度計原子化條件：(1)火焰類型和特性:在火焰原子化法中，火焰類型和特性是影響原子化效率的主要因素。對低、中溫元素，使用空氣-乙炔火焰;對高溫元素，宜采用氧化亞氮-乙炔高溫火焰;對分析線位于短波區(qū)(200nm以下)的元素，使用空氣-氫火焰是合適的。對于確定類型的火焰，稍富燃的火焰(燃氣量大于化學(xué)計量)是有利的。對氧化物不十分穩(wěn)定的元素如Cu、Mg、Fe、Co、Ni等，用化學(xué)計量火焰(燃氣與助燃氣的比例與它們之間化學(xué)反應(yīng)計量量相近)或貧燃火焰(燃氣量小于化學(xué)計量)也是可以的。為了獲得所需特性的火焰，需要調(diào)節(jié)燃氣與助燃氣的比例。(2)燃燒器的高度選擇:在火焰區(qū)內(nèi)，自由原子的空間分布是不均勻，且隨火焰條件而改變，因此，應(yīng)調(diào)節(jié)燃燒器的高度，以使來自空心陰極燈的光束從自由原子濃度較大的火焰區(qū)域通過，以期獲得高的靈敏度。原子吸收分光光度計有單光束，雙光束，雙波道，多波道等結(jié)構(gòu)形式。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="中端原子吸收分光光度計儀器,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991385859509/5179129.png"></div><p style="text-indent:25px">原子吸收分光光度計常見的故障解決方法：1、故障現(xiàn)象：燃燒器底座不光潔，造成汽化的樣品被阻擋，影響靈敏度。產(chǎn)生原因：一般燃燒器均是由上蓋部分（燃燒縫也在此處）和底座結(jié)合而成，但是，當?shù)鬃暗鬃鼙诒桓g后同樣會生銹，從而造成汽化樣品因受阻而流通不暢，使測試靈敏度降低。排除方法：與清潔燃燒縫的方法一樣，用1000目水砂紙打磨底座和底座管壁。2、故障現(xiàn)象：冷卻循環(huán)水溫度過低，致使燃燒縫結(jié)露造成不易點火或火焰分叉故障。產(chǎn)生原因：當冷卻循環(huán)水的溫度遠遠低于室內(nèi)溫度時，燃燒器的溫度同樣低于室內(nèi)溫度，于是，當被汽化的樣品經(jīng)過燃燒縫時，比較多樣品因受急速降溫所形成的水珠被潴留在縫原子化器主要有兩大類，即原子吸收分光光度計和電熱原子化器?？諝庠游辗止夤舛扔嬙趺礃?/p><p style="text-indent:25px">原子吸收分光光度計具有靈敏度高及選擇性好兩大主要優(yōu)點。中端原子吸收分光光度計儀器</p><p style="text-indent:25px">新購儀器應(yīng)及時開箱,按清單逐一查對主機、附件、零配件和運用闡明書等能否齊全,同時要檢查儀器二表觀能否有損傷。如發(fā)現(xiàn)問題及時向消費戶家提出,要留意維護現(xiàn)場,以便剖析損傷緣由。在開箱后和裝置前,必需認真閱讀儀器運用闡明書,熟習(xí)儀器原理、構(gòu)造和運用辦法,理解儀器對實驗,室環(huán)境條件和安裝條件的請求：完善條件和做好裝置前的各項準備工作將主機、計算機、打印機、空壓機、循環(huán)冷卻水安裝、石墨爐及其電源安裝當心從包裝箱中取出,按闡明書請求整體規(guī)劃。主機和附件放在工作臺上以后,調(diào)整其底腳使之平穩(wěn)、受力平均。逐一檢查主機的外光路,主機和配件電器及機械局部的表觀情況。然后依照闡明書中的請求銜接好儀器的電路、氣路和水路。中端原子吸收分光光度計儀器</p></p><br /><p>文章來源地址: 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