氮氣原子吸收分光光度計經(jīng)銷商誠信互利上海儀電分析儀器供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="原子吸收分光光度計可普遍應(yīng)用于食品、醫(yī)藥、環(huán)境、生物、農(nóng)業(yè)、石油化工、建筑、材料、地質(zhì)、冶金、科研等領(lǐng)域，氮氣原子吸收分光光度計經(jīng)銷商，氮氣原子吸收分光光度計經(jīng)銷商。一、原子吸收火焰法：原子吸收的火焰法作為一種較常用的分析方法被普遍的使用，"><meta name="keywords" content="氮氣原子吸收分光光度計經(jīng)銷商,原子吸收分光光度計"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta 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id="uja2ocy" 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>氮氣原子吸收分光光度計經(jīng)銷商,原子吸收分光光度計</p><p><span>***更新：</span>2021-01-27 18:25:07</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="5tl7rj8" 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(dāng)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="cg7q2by" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="mro8y7v" class="box"><p><p style="text-indent:25px">原子吸收分光光度計可普遍應(yīng)用于食品、醫(yī)藥、環(huán)境、生物、農(nóng)業(yè)、石油化工、建筑、材料、地質(zhì)、冶金、科研等領(lǐng)域，氮氣原子吸收分光光度計經(jīng)銷商，氮氣原子吸收分光光度計經(jīng)銷商。一、原子吸收火焰法：原子吸收的火焰法作為一種較常用的分析方法被普遍的使用，對于一些常見的，含量在一定可測范圍內(nèi)金屬元素而言，火焰原子吸收法簡單而快捷，結(jié)果的準(zhǔn)確度非常高。二、原子吸收石墨爐法：原子吸收石墨爐法是原子吸收應(yīng)用中較經(jīng)典的方法，一般的石墨爐可以瞬時升溫至3000℃，對于一些含量極低的或者一些高溫元素的定量檢測十分有效，甚至比較多儀器和分析**認(rèn)為，之所以原子吸收分光光度計沒有被淘汰至今還在普遍的適用正是因為原子吸收的石墨爐法的精度及較小檢測極限是目前所有測試方法中幾乎無可替代的。三、原子吸收氫化物法：也稱冷原子法，一般用于測定汞、砷之類的元素。所以在原子吸收分光光度計的選擇上，氮氣原子吸收分光光度計經(jīng)銷商，我們首先要選定主要是用哪一種方法去做金屬元素的含量測定，然后根據(jù)測定方法去確定原子吸收分光光度計的配置。原子吸收分光光度計的實際應(yīng)用：有機物分析中的應(yīng)用。氮氣原子吸收分光光度計經(jīng)銷商</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="氮氣原子吸收分光光度計經(jīng)銷商,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988163192494/7997740.png"></div><p style="text-indent:25px">原子吸收光譜儀又稱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。它能夠靈敏可靠地測定微量或痕量元素。氣態(tài)的原子能發(fā)射某些特征譜線，也能吸收同樣波長的這些譜線。這是歷史上用原子吸收光譜進行定性分析的一例證。很長一段時間，原子吸收主要局限于天體物理方面的研究，在分析化學(xué)中的應(yīng)用未能引起重視，其主要原因是未找到可產(chǎn)生銳線光譜的光源。直至20世紀(jì)30年代，由于汞的多應(yīng)用，對大氣中微量汞的測定曾利用原子吸收光譜原理設(shè)計了測汞儀，這是原子吸收在分析中的早應(yīng)用。材料原子吸收分光光度計選擇原子吸收分光光度計的上方必需準(zhǔn)備一個通風(fēng)罩，使熄滅器產(chǎn)生的熄滅氣體能順利排。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="氮氣原子吸收分光光度計經(jīng)銷商,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991326259040/7441452.png"></div><p style="text-indent:25px">原子吸收分光光度計工作原理：元素在熱解石墨爐中被加熱原子化，成為基態(tài)原子蒸汽，對空心陰極燈發(fā)射的特征輻射進行選擇性吸收。在一定濃度范圍內(nèi)，其吸收強度與試液中被測元素的含量成正比。其定量關(guān)系可用郎伯-比耳定律，A=-lgI/Io=-lgT=KCL，式中I為透射光強度；I0為發(fā)射光強度；T為透射比；L為光通過原子化器光程(長度)，每臺儀器的L值是固定的；C是被測樣品濃度；所以A=KC。利用待測元素的共振輻射，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。它有單光束，雙光束，雙波道，多波道等結(jié)構(gòu)形式。其基本結(jié)構(gòu)包括光源，原子化器，光學(xué)系統(tǒng)和檢測系統(tǒng)。它主要用于痕量元素雜質(zhì)的分析，具有靈敏度高及選擇性好兩大主要優(yōu)點。普遍應(yīng)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(yīng)的空心陰極燈，這對檢測工作帶來不便。</p><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空心陰極燈的工作電流。空心陰極燈一般需要預(yù)熱10-30min才能達到穩(wěn)定輸出。燈電流過小，放電不穩(wěn)定，故光譜輸出不穩(wěn)定，且光譜輸出強度小;燈電流過大，發(fā)射譜線變寬，導(dǎo)致靈敏度下降，校正曲線彎曲，燈壽命縮短。選用燈電流的一般原則是，在保證有足夠強且穩(wěn)定的光強輸出條件下，盡量使用較低的工作電流。通常以空心陰極燈上標(biāo)明的Z大電流的一半至三分之二作為工作電流。在具體的分析場合，較適宜的工作電流由實驗確定。2、原子吸收分光光度計進樣量。進樣量過小，吸收信號弱，不便于測量;進樣量過大，在火焰原子化法中，對火焰產(chǎn)生冷卻效應(yīng)，在石墨爐原子化法中，會增加除殘的困難。在實際工作中，應(yīng)測定吸光度隨進樣量的變化，達到滿意的吸光度的進樣量，即為應(yīng)選擇的進樣量。試樣中被測元素原子化的方法主要有火焰原子化法和非火焰原子化法兩種。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="氮氣原子吸收分光光度計經(jīng)銷商,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儀器工作原理：將待分析物質(zhì)以適當(dāng)方法轉(zhuǎn)變?yōu)槿芤?，并將溶液以霧狀引入原子化器。此時，被測元素在原子化器中原子化為基態(tài)原子蒸氣。當(dāng)光源發(fā)射出的與被測元素吸收波長相同的特征譜線通過基態(tài)原子蒸氣時，光能因被基態(tài)原子所吸收而減弱，其減弱的程度（吸光度）在一定條件下，與基態(tài)原子的數(shù)目（元素濃度）之間的關(guān)系，遵守朗伯-比耳定律。被基態(tài)原子吸收后的譜線，經(jīng)分光系統(tǒng)分光后，由檢測器接收，轉(zhuǎn)換為電信號，再經(jīng)放大器放大，由顯示系統(tǒng)顯示出吸光度或光譜圖。儀器基本結(jié)構(gòu)：原子吸收分光光度計主要由光源、原子化器、單色器、檢測系統(tǒng)和顯示系統(tǒng)等部分組成。火焰原子吸收分光光度計應(yīng)用多。原子吸收分光光度計單價</p><p style="text-indent:25px">子吸收分光光度計使用的標(biāo)準(zhǔn)溶液在4℃溫度下可保存較長時間，放置室溫后可正常使用。氮氣原子吸收分光光度計經(jīng)銷商</p><p style="text-indent:25px">原子吸收分光光度計Stockdale雙光束光學(xué)體系：Stockdale雙光束儀器，其作業(yè)原理是在光束經(jīng)過途徑的原子化器前方和后方分別添加一塊可以移動或滾動的反射鏡，反射鏡驅(qū)離光路時光束全部經(jīng)過原子化器，反射鏡移入光路時，光源輻射繞過原子化器完全進入單色器，并將此光信號作為參閱光束，與樣品光束分別測量運算。在測定時間內(nèi)重復(fù)地將這對反射鏡移入和驅(qū)離光路，到達雙光束的效果。這樣的雙光束體系不削減進入分光體系的光能量，能獲得較好的信噪比，關(guān)于緩慢的基線漂移有很好的補償效果。氮氣原子吸收分光光度計經(jīng)銷商</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3037260.html</p></div></div></div></div></div><div id="chuo3eb" class="page-right twoColRt"><div id="gamegnk" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="ncuryp7" 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(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="o8swipb" class="recomPic likePro"><a 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