全自動原子吸收分光光度計多少錢歡迎來電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(gòu)成物質(zhì)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(gòu)成物質(zhì)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"><meta name="keywords" content="全自動原子吸收分光光度計多少錢,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 http-equiv="Cache-Control" content="no-transform" /> 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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>全自動原子吸收分光光度計多少錢,原子吸收分光光度計</p><p><span>***更新：</span>2021-01-29 08:13:39</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="8wt9xzb" 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="ihe9tv3" class="page-proshow02"><p class="title">詳細說明</p><div id="q3kmjvs" class="box"><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(gòu)成物質(zhì)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(gòu)成物質(zhì)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，全自動原子吸收分光光度計多少錢，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(chǎn)生絡(luò)合反應(yīng)的分子），與我們的被測元素產(chǎn)生反應(yīng)，并且反應(yīng)物分子帶有特定的顏色，全自動原子吸收分光光度計多少錢，經(jīng)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，全自動原子吸收分光光度計多少錢，通過能量差（透過率）來計算出濃度。原子吸收分光光度計原子化條件：程序升溫的條件選擇。全自動原子吸收分光光度計多少錢</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="全自動原子吸收分光光度計多少錢,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(jié)構(gòu)形式。其基本結(jié)構(gòu)包括光源，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(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。材料原子吸收分光光度計現(xiàn)貨原子吸收分光光度計對空心陰極燈發(fā)射的特征輻射進行選擇性吸收。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="全自動原子吸收分光光度計多少錢,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">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(yīng)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?；鹧姘礌顟B(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(guān)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。</p><p style="text-indent:25px">電熱原子化器電熱原子化器的種類有多種，如電熱高溫管式石墨爐原子化器、石墨杯原子化器、鉭舟原子化器、碳棒原子化器、鎳杯原子化器、高頻感應(yīng)爐和等離子噴焰等。在商品儀器中常用的電熱原子化器是管式石墨爐原子化器。石墨爐是用石墨管做成，將樣品用進樣器定量注入石墨管中，并以石墨管作為電阻發(fā)熱體，通電后迅速升溫，使試樣達到原子化目的。它由加熱電源、保護氣控制系統(tǒng)和石墨管狀爐組成。外電源加于石墨管兩端供給原子化器能量，電流通過石墨管產(chǎn)生3000℃的高溫，使置于石墨管中的被測元素變?yōu)榛鶓B(tài)原子蒸氣。保護氣系統(tǒng)是控制保護氣的。外氣路中的Ar氣沿石墨管外壁流動，以保護石墨管不被燒蝕；內(nèi)氣路中的Ar從管兩端流向管中心由管中心孔流出以有效地除去在干燥和灰化過程中產(chǎn)生的基體成分，同時保護已經(jīng)原子化了的原子不再被氧化。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="全自動原子吸收分光光度計多少錢,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">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(yīng)留意：配制的規(guī)范溶液濃度應(yīng)在吸光度與濃度成線性的范圍內(nèi)；整個剖析過程中操作條件應(yīng)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(zhì)相同，保證不存在干擾物，關(guān)于組成尚不分明的樣品不能用規(guī)范曲線法。原子吸收分光光度計安全操作須知：建議將氣瓶安裝在不受陽光直接照射的室外。材料原子吸收分光光度計現(xiàn)貨</p><p style="text-indent:25px">原子吸收光譜儀又稱原子吸收分光光度計。全自動原子吸收分光光度計多少錢</p><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。全自動原子吸收分光光度計多少錢</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3064244.html</p></div></div></div></div></div><div id="8eqfgs7" class="page-right twoColRt"><div id="rlnxjvc" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="3ta9umt" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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