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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="nce7rtq" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991311337342/3521940.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="3kmbszb" 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)品關鍵詞：</span>司法檢測原子吸收分光光度計代理,原子吸收分光光度計</p><p><span>***更新：</span>2021-01-18 08:12:35</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="a8s4ipr" 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="wqn7f3y" class="page-proshow02"><p class="title">詳細說明</p><div id="qkwqc7w" class="box"><p><p style="text-indent:25px">原子吸收分光光度計內(nèi)標法是在試樣各含量不同的一系列規(guī)范試樣中，分別參加固定量的純物質(zhì)，即內(nèi)標物。在規(guī)范條件下測定剖析元素和內(nèi)標元素的吸光度比，以此比值對濃度作圖，制作規(guī)范曲線，在同樣條件下，測定試樣中被測元素和內(nèi)標元素的吸光度比值，司法檢測原子吸收分光光度計代理，在從規(guī)范曲線上讀取對應的濃度。長處：可以減少試驗條件按變化引起的隨機誤差，進步精細度。缺乏：需要使用雙通道原子吸收光譜儀，使用上受到限制。剖析速度快，可多元素和常量，司法檢測原子吸收分光光度計代理、微量元素一起進行剖析。一般的發(fā)射光譜剖析法不適用于測定樣品中含量高的元素，假如通過辦法研究滿意了準確測定高含量元素的要求，司法檢測原子吸收分光光度計代理，則常不能滿意微量元素的需要。采用電感耦合等離子體發(fā)射光譜剖析辦法成功地處理了這類問題。原子吸收分析中，首先要使待測元素呈原子狀態(tài)。司法檢測原子吸收分光光度計代理</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="司法檢測原子吸收分光光度計代理,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991311337342/3521940.png"></div><p style="text-indent:25px">原子吸收分光光度計的開展：1981年原子吸收分光光度計完成操作自動化。1984年首臺連續(xù)氫化物發(fā)生器面世。1990年推出世界上先進的MarkV1焰燃燒頭。1995年在線火焰自動進樣器（SIPS8）研制成功并投入運用。1998年首臺快速剖析火焰原子吸收220FS誕生。2002年世界上**火焰和石墨爐同時剖析的原子吸收光譜儀出產(chǎn)并投放市場。原子吸收分光光度計怎樣用才正確？該崗位群主要是散布于冶金、環(huán)保、食物、制藥、醫(yī)療衛(wèi)生、化學、化工、農(nóng)業(yè)等領域，主要從事環(huán)境和產(chǎn)品中金屬物質(zhì)的檢驗以及科學研制的質(zhì)量操控等工作。水質(zhì)原子吸收分光光度計賣價原子吸收分光光度計由于儀器使用中，需用乙炔、氫氣、氬氣、氧化亞氮（俗稱笑氣）等。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="司法檢測原子吸收分光光度計代理,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991268710095/3209448.png"></div><p style="text-indent:25px">原子吸收分光光度計光譜攪擾：光譜攪擾包含譜線堆疊、光譜通帶內(nèi)存在非吸收線、原子化池內(nèi)的直流發(fā)射、分子吸收、光散射等。當采用銳線光源和交流調(diào)制技能時，**種要素一般能夠不予考慮，首要考慮分子吸收和光散射的影響，它們是構(gòu)成光譜背景的首要要素。電感耦合等離子發(fā)射光譜儀：是以射頻發(fā)生器供給的高頻能量加到感應耦合線圈上，并將等離子炬管置于該線圈中間，因而在炬管中發(fā)生高頻電磁場，用微電火花點燃，使通入炬管中的氬氣電離，發(fā)生電子和離子而導電，導電的氣體受高頻電磁場效果，構(gòu)成與耦合線圈同心的渦流區(qū)，強壯的電流發(fā)生的高熱，從而構(gòu)成火炬形狀的并可以自我克制的等離子體，由于高頻電流的趨膚效應及內(nèi)管載氣的效果，使等離子體呈環(huán)狀結(jié)構(gòu)。</p><p style="text-indent:25px">在原子化進程中，用高達數(shù)百安培電流加熱石墨管，在一秒鐘內(nèi)使之達到2000℃～3000℃，樣品在如此短的時刻被加熱蒸騰、解離成分子、原子蒸氣是一個急速分散脹大改變進程。石墨管內(nèi)待測元素原子和共存物質(zhì)蒸氣的濃度具有激烈的時空特性，即管內(nèi)不同點的濃度隨時刻而急速改變，同一時刻不同方位的濃度也不同。用快速響應檢測電路系統(tǒng)取得的原子吸收和背景吸收信號是兩條隨時刻改變的曲線，這便是原子化信號的瞬態(tài)性。這一點與火焰法的安穩(wěn)信號完全不同。此外，原子化進程的瞬態(tài)信號還受制于石墨管的時刻和空間溫度特性，此乃人們感興趣也是研究很多的問題之一。原子吸收分光光度計使對難溶元素的測定靈敏度還不夠理想。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="司法檢測原子吸收分光光度計代理,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">通常情況下，原子處于基態(tài)。當相當于原子中的電子由基態(tài)躍遷到激發(fā)態(tài)所需求的輻射頻率經(jīng)過原子蒸氣，原子就能從入射輻射中吸收能量，發(fā)生共振吸收，然后發(fā)生吸收光譜。原子吸收剖析便是使用基態(tài)原子對特征輻射的吸收程度的，常使用強吸收線作為剖析線。原子吸收光譜儀由以下四部分組成光源系統(tǒng):空心陰燈原子化系統(tǒng):火焰原子化器;原子吸收分光光度計或氫化物發(fā)生器。分光系統(tǒng)：單色器檢測系統(tǒng)：光電倍增管等。原子吸收分光光度計的長處是:原子化效率高，在可調(diào)的高溫下試樣使用率達100，活絡度高，試樣用量少，適用于難熔元素的測定。缺陷是:試樣組成不均勻性的影響較大，測定度較低，共存化合物的攪擾比火焰原子化法大，攪擾布景比較嚴重，一般都需求校正布景。原子吸收分光光度計根據(jù)物質(zhì)基態(tài)原子蒸汽對特征輻射吸收的作用來進行金屬元素分析。實驗室原子吸收分光光度計廠家供應</p><p style="text-indent:25px">原子吸收分光光度計若使用氧化亞氮—乙炔火焰。司法檢測原子吸收分光光度計代理</p><p style="text-indent:25px">原子吸收分光光度計的優(yōu)點是：（1）檢出限低，靈敏度高?；鹧嬖游辗ǖ臋z出限可達10-9g（ppm級），石墨爐原子吸收法更高，可達ppb級。（2）丈量精度好。火焰原子吸收法測定中等和高含量元素的相對偏差可小于0.01，丈量精度已接近于經(jīng)典化學辦法。石墨爐原子吸收法的丈量精度一般為3-5。樣品由載氣（氬）帶入霧化系統(tǒng)進行霧化后，以氣溶膠形式進入等離子體的軸向通道，在高溫文惰性氣氛中被充沛蒸騰、原子化、電離和激起，發(fā)射出所含元素的特征譜線。依據(jù)特征譜線的存在與否，鑒別樣品中是否含有某種元素（定性分析）；根依據(jù)特征譜線強度確定樣品中相應元素的含量（定量分析）。司法檢測原子吸收分光光度計代理</p><p style="text-indent:25px">上海儀電分析儀器有限公司位于徐塘路88號7幢4層、9幢。公司自成立以來，以質(zhì)量為發(fā)展，讓匠心彌散在每個細節(jié)，公司旗下分光光度計，氣相色譜，原子吸收，食品安全深受客戶的喜愛。公司從事儀器儀表多年，有著創(chuàng)新的設計、強大的技術，還有一批**的專業(yè)化的隊伍，確保為客戶提供良好的產(chǎn)品及服務。儀電分析秉承“客戶為尊、服務為榮、創(chuàng)意為先、技術為實”的經(jīng)營理念，全力打造公司的重點競爭力。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2900550.html</p></div></div></div></div></div><div id="rl2h0aw" class="page-right twoColRt"><div id="32jtfel" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="odaxz38" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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