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clearfix"><h1>車載原子吸收分光光度計排名推薦咨詢上海儀電分析儀器供應</h1><div id="hfvqbrm" class="proBig"><div id="ux8or77" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988105282341/1372565.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="bopl2fa" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988105282341/1372565.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="xk3cwhm" 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>產品關鍵詞：</span>車載原子吸收分光光度計排名,原子吸收分光光度計</p><p><span>***更新：</span>2021-02-02 01:11:38</p><p><span id="click" >瀏覽次數(shù)：4次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="qd7kkfq" 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="o3t89hc" class="page-proshow02"><p class="title">詳細說明</p><div id="lyeoyjy" class="box"><p><p style="text-indent:25px">原子吸收分光光度計利用待測元素的共振輻射，原子吸收分光光度計價格通過其原子蒸汽，測定其吸光度的裝置稱為原子吸收分光光度計。原子吸收分光光度計價格它有單光束，雙光束，雙波道，多波道等結構形式，車載原子吸收分光光度計排名。其基本結構包括光源，車載原子吸收分光光度計排名，原子化器，光學系統(tǒng)和檢測系統(tǒng)。它主要用于痕量元素雜質的分析，具有靈敏度高及選擇性好兩大主要優(yōu)點，車載原子吸收分光光度計排名。普遍應用于各種氣體，金屬有機化合物，金屬醇鹽中微量元素的分析。但是測定每種元素均需要相應的空心陰極燈，這對檢測工作帶來不便。原子吸收光譜儀又稱原子吸收分光光度計。車載原子吸收分光光度計排名</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="車載原子吸收分光光度計排名,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988105282341/1372565.png"></div><p style="text-indent:25px">如何才能正確選擇原子吸收分光光度計？1.原子吸收分光光度計分析線。通常選用共振吸收線為分析線，測定高含量元素時，可以選用靈敏度較低的非共振吸收線為分析線。As、Se等共振吸收線位于200nm以下的遠紫外區(qū)，火焰組分對其有明顯吸收，故用火焰原子吸收法測定這些元素時，不宜選用共振吸收線為分析線。2.原子吸收分光光度計狹縫寬度。狹縫寬度影響光譜通帶寬度與檢測器接受的能量。原子吸收光譜分析中，光譜重疊干擾的幾率小，可以允許使用較寬的狹縫。調節(jié)不同的狹縫寬度，測定吸光度隨狹縫寬度而變化，當有其它的譜線或非吸收光進入光譜通帶內，吸光度將立即減小。不引起吸光度減小的較大狹縫寬度，即為應選取的合適的狹縫寬度。車載原子吸收分光光度計排名點火時操作人員應處于儀器正面左側，且右側及正后方不能站人。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="車載原子吸收分光光度計排名,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988134237392/1056352.png"></div><p style="text-indent:25px">原子吸收分光光度法常使用哪些定量分析方法?規(guī)范曲線法：先配制相同基體的含有不同濃度待測元素的系列規(guī)范溶液，在選定的實驗條件下分別測其吸光度.以扣除空白值之后的吸光度為縱坐標，規(guī)范溶液濃度為橫坐標繪制規(guī)范曲線。在同樣操作條件下測定試樣溶液的吸光度，從規(guī)范曲線查得試樣溶液的濃度。運用該辦法時應留意：配制的規(guī)范溶液濃度應在吸光度與濃度成線性的范圍內；整個剖析過程中操作條件應堅持不變。另外，規(guī)范曲線法固然簡單，但必需保證規(guī)范樣品與試樣的物理性質相同，保證不存在干擾物，關于組成尚不分明的樣品不能用規(guī)范曲線法。</p><p style="text-indent:25px">原子吸收分光光度計與紫外可見分光光度計的區(qū)別：1、原理：原子吸收觀察的是構成物質的元素（原子）中的電子在原子軌道中的躍遷，屬于原子吸收。紫外可見光吸收觀察的是構成物質的分子中的電子在分子軌道中的躍遷，屬于分子吸收。2、能量:兩者有所同，又有所不同。定量分析的原則同，而測量所需的光能量不同：原子吸收為X射線，能量大，可激發(fā)電子從低的原子軌道向高的原子軌道躍遷。紫外可見吸收為紫外光及可見光，能量小，只能激發(fā)電子從分子軌道向較低（或次低）的空的分子軌道躍遷。通俗的說，原子吸收分光光度計是用較高的溫度來燃燒分子，使之原子化（變?yōu)榛鶓B(tài)原子），再通過特征輻射，把基態(tài)原子激發(fā)，并吸收能量，通過這個能量差（透過率）來計算出濃度。而紫外—可見分光光度計是通過顯色劑（一種能和我們被測元素產生絡合反應的分子），與我們的被測元素產生反應，并且反應物分子帶有特定的顏色，經過分子吸收氘燈（紫外區(qū)）或鎢燈（可見區(qū)）的照射，吸收燈發(fā)射的能量，通過能量差（透過率）來計算出濃度。將試樣中待測元素變成氣態(tài)的基態(tài)原子的過程稱為試樣的“原子化”。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="車載原子吸收分光光度計排名,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安全操作須知：儀器點火前必須進行以下項目的安全檢查。1、燃氣氣路密閉性：打開氣瓶總閥后迅速關閉，觀察3分鐘內氣表壓降應小于0.IMpa；2、燃燒頭：確認燃燒頭己安裝、且緊密到位；3、水封檢測：無液位檢測裝置儀器，廢液管的繞環(huán)中必須有存液且液體能夠封住管路；有液位檢測裝置儀器，向液位檢測裝置中加水，廢液管中應有液體流出；4、空壓機：空壓機輸出壓力應大于0.2MPa，霧化室內應有氣流聲；5、防爆塞：確認防爆塞已安裝、且壓緊。6、緊急滅火開關：當按下緊急滅火按鈕后，按鈕變亮，火焰熄滅。霧化器狀態(tài)檢查：打開空壓機達到工作壓力后吸噴蒸餾水，燃燒縫中應有水霧噴出。7、乙炔報警板功能檢查：儀器通電2分鐘后，用洗耳球吸取飽和的酒精氣體（酒精濃度＞99%）,對準儀器背面測試孔或散熱孔，將酒精氣體吹入儀器內部，2分鐘內儀器應發(fā)出報瞥蜂鳴聲。若未發(fā)出報警聲，請聯(lián)系當?shù)毓こ處熥稍兙唧w情況。原子吸收分光光度計氧化亞氮—乙炔火焰安全性較差。常見原子吸收分光光度計</p><p style="text-indent:25px">火焰原子化法的優(yōu)點是：火焰原子化法的操作簡便，重現(xiàn)性好，有效光程大。車載原子吸收分光光度計排名</p><p style="text-indent:25px">石墨爐原子吸收分光光度計火焰類型：火焰類型和狀態(tài)對靈敏度高低起著重要作用，應根據(jù)被測元素特性去選擇不同火焰。目前火焰按類型分有空氣一氫火焰、空氣一乙炔火焰、一氧化氮一乙炔火焰?？諝庖粴浠鹧娴幕鹧鏈囟容^低，用于測定火焰中容易原子化的元素如砷、硒等;空氣一乙炔火焰屬于中溫火焰，用于測定火焰中較難離解的元素如鎂、鈣、銅、鋅、鉛、錳等;一氧化氮一乙炔火焰屬于高溫火焰，用于測定火焰中難于離解的元素如釩、鋁等。火焰按狀態(tài)分有貧焰、化學計量焰、富焰。貧焰是指使用過量氧化劑時的火焰，由于大量冷的氧化劑帶走火焰中的熱量，這種火焰溫度較低，又由于氧化劑充分，燃燒完全，火焰具有氧化性氣氛，所以這種火焰適用于堿金屬元素的測定?；瘜W計量焰是按化學計量關系計算的燃料和氧化劑比率燃燒的火焰，它具有溫度高、干擾少、穩(wěn)定、背景低等特點，除堿金屬和易形成難離解氧化物的元素，大多數(shù)常見元素常用這種火焰。富焰是便用過量燃料的火焰，由于燃燒不完全，火焰具有較強的還原氣氛，所以，這種火焰具有還原性，適用于測定較易于形成難熔氧化物的元素如鑰、稀土元素等。車載原子吸收分光光度計排名</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3115224.html</p></div></div></div></div></div><div id="8h88ft8" class="page-right twoColRt"><div id="tlrxdte" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="qjplrrx" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應" 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