實(shí)驗(yàn)室原子吸收分光光度計(jì)排名服務(wù)為先上海儀電分析儀器供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="原子吸收分光度計(jì)分析樣品優(yōu)點(diǎn)：⑴靈敏度高。采用火焰原子化方式，大多元素的靈敏度可達(dá)ppm級(jí)，少數(shù)元素可達(dá)ppb級(jí)，原子吸收分光度計(jì)若用高溫石墨爐原子化，其靈敏度可達(dá)10-10-10-14g，因此，原子吸收光譜法極適用于痕量金屬分析，實(shí)驗(yàn)室原"><meta name="keywords" content="實(shí)驗(yàn)室原子吸收分光光度計(jì)排名,原子吸收分光光度計(jì)"><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" 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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(jī): </span>021-34530361</p><p><span>地址: </span>徐塘路88號(hào)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="cfwghle" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="2de2zq0" class="box"><p><p style="text-indent:25px">原子吸收分光度計(jì)分析樣品優(yōu)點(diǎn)：⑴靈敏度高。采用火焰原子化方式，大多元素的靈敏度可達(dá)ppm級(jí)，少數(shù)元素可達(dá)ppb級(jí)，原子吸收分光度計(jì)若用高溫石墨爐原子化，其靈敏度可達(dá)10-10-10-14g，因此，原子吸收光譜法極適用于痕量金屬分析，實(shí)驗(yàn)室原子吸收分光光度計(jì)排名。⑵選擇性好。由于原子吸收線比原子發(fā)射線少得多，因此，本法的光譜干擾少，加之采用單元素制成的空芯陰極燈作銳線光源，光源輻射的光譜較純，對(duì)樣品溶液中被測(cè)元素的共振線波長處不易產(chǎn)生背景發(fā)射干擾。⑶操作方便，實(shí)驗(yàn)室原子吸收分光光度計(jì)排名、快速。原子吸收光譜分析與分光光度分析極為類似，其儀器結(jié)構(gòu)、原理也大致相同，原子吸收分光度計(jì)因此對(duì)于長期從事化學(xué)分析的人使用原子吸收儀器極為方便，實(shí)驗(yàn)室原子吸收分光光度計(jì)排名，火焰原子吸收分析的速度也較快。原子吸收分光光度計(jì)即每種待測(cè)元素都要有一個(gè)能發(fā)射特定波長譜線的光源。實(shí)驗(yàn)室原子吸收分光光度計(jì)排名</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="實(shí)驗(yàn)室原子吸收分光光度計(jì)排名,原子吸收分光光度計(jì)" 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(cè)元素的系列規(guī)范溶液，在選定的實(shí)驗(yàn)條件下分別測(cè)其吸光度.以扣除空白值之后的吸光度為縱坐標(biāo)，規(guī)范溶液濃度為橫坐標(biāo)繪制規(guī)范曲線。在同樣操作條件下測(cè)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(yùn)用該辦法時(shí)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(gè)剖析過程中操作條件應(yīng)堅(jiān)持不變。另外，規(guī)范曲線法固然簡(jiǎn)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。國內(nèi)**原子吸收分光光度計(jì)生產(chǎn)廠家原子吸收分光光度計(jì)主要用于痕量元素雜質(zhì)的分析。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="實(shí)驗(yàn)室原子吸收分光光度計(jì)排名,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991291551872/1267970.png"></div><p style="text-indent:25px">光源的作用是發(fā)射出能被待測(cè)元素吸收的特征波長譜線，供測(cè)量用。為了保證峰值吸收的測(cè)量，要求光源必須能發(fā)射出比吸收線寬度更窄的銳線光譜，并且強(qiáng)度大而穩(wěn)定，背景低且噪聲小，使用壽命長?？招年帢O燈（hollowcathodelamp，HCL）、無極放電燈、蒸氣放電燈和激光光源燈都能滿足上述要求，其中應(yīng)用較普遍的是空心陰極燈和無極放電燈。量寶空心陰極燈又稱元素?zé)?，根?jù)陰極材料的不同，分為單元素?zé)艉投嘣責(zé)敉ǔ?，單元素的空心陰極燈只能用于一種元素的測(cè)定，這類燈發(fā)射線干擾少，強(qiáng)度高，但每測(cè)一種元素需要更換一種燈。多元素?zé)艨蛇B續(xù)測(cè)定幾種元素，減少了換燈的麻煩，但光強(qiáng)度較弱，容易產(chǎn)生干擾。目前，中國生產(chǎn)的空心陰極燈可以滿足國內(nèi)外各種型號(hào)的原子吸收分光光度計(jì)的要求，元素品種達(dá)60余種。</p><p style="text-indent:25px">原子吸收分光光度計(jì)安全操作須知：儀器點(diǎn)火前必須進(jìn)行以下項(xiàng)目的安全檢查。1、燃?xì)鈿饴访荛]性：打開氣瓶總閥后迅速關(guān)閉，觀察3分鐘內(nèi)氣表壓降應(yīng)小于0.IMpa；2、燃燒頭：確認(rèn)燃燒頭己安裝、且緊密到位；3、水封檢測(cè)：無液位檢測(cè)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(cè)裝置儀器，向液位檢測(cè)裝置中加水，廢液管中應(yīng)有液體流出；4、空壓機(jī)：空壓機(jī)輸出壓力應(yīng)大于0.2MPa，霧化室內(nèi)應(yīng)有氣流聲；5、防爆塞：確認(rèn)防爆塞已安裝、且壓緊。6、緊急滅火開關(guān)：當(dāng)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(jī)達(dá)到工作壓力后吸噴蒸餾水，燃燒縫中應(yīng)有水霧噴出。7、乙炔報(bào)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(duì)準(zhǔn)儀器背面測(cè)試孔或散熱孔，將酒精氣體吹入儀器內(nèi)部，2分鐘內(nèi)儀器應(yīng)發(fā)出報(bào)瞥蜂鳴聲。若未發(fā)出報(bào)警聲，請(qǐng)聯(lián)系當(dāng)?shù)毓こ處熥稍兙唧w情況。原子吸收分光光度計(jì)應(yīng)用不普遍。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="實(shí)驗(yàn)室原子吸收分光光度計(jì)排名,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988188495975/1516361.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)與紫外可見分光光度計(jì)的區(qū)別：1、光源:紫外可見分光光度計(jì)使用的是鎢燈或氘燈發(fā)射連續(xù)光譜。原子吸收分光光度計(jì)使用的是空心陰極燈發(fā)射特征波長的銳線光，選擇性會(huì)更好。2、檢測(cè)器：紫外可見分光光度計(jì)一般使用光電管來檢測(cè)。而原子吸收分光光度計(jì)使用的是光電倍增管，分辨力比光電管強(qiáng)。3、應(yīng)用：原子吸收分光光度計(jì)是屬于原子光譜。紫外可見分光光度計(jì)屬于分子光譜，兩者都符合朗伯-比耳定律；4、檢出限:原子吸收分光光度計(jì)檢出限低，火焰原子吸收法的檢出限可達(dá)到ppb級(jí)。紫外可見分光光度計(jì)如果顯色劑不同則檢出限也不一樣，但每種顯色劑帶來的干擾也會(huì)不一樣。原子吸收分光光度計(jì)通過其原子蒸汽，測(cè)定其吸光度的裝置稱為原子吸收分光光度計(jì)。暗箱原子吸收分光光度計(jì)多少錢</p><p style="text-indent:25px">原子吸收分光光度計(jì)有單光束，雙光束，雙波道，多波道等結(jié)構(gòu)形式。實(shí)驗(yàn)室原子吸收分光光度計(jì)排名</p><p style="text-indent:25px">原子吸收光譜儀所檢測(cè)，導(dǎo)致吸光度值偏高：光譜背景除了波長特征之外，還有時(shí)間、空間分布特征。分子吸收通常先于原子吸收信號(hào)之前產(chǎn)生，當(dāng)有快速響應(yīng)電路和記錄裝置時(shí)，可以從時(shí)間上分辨分子吸收和原子吸收信號(hào)。樣品蒸氣在石墨爐內(nèi)分布的不均勻性，導(dǎo)致了背景吸收空間分布的不均勻性。提高溫度使單位時(shí)間內(nèi)蒸發(fā)出的背景物的濃度增加，同時(shí)也使分子解離增加。這兩個(gè)因素共同制約著背景吸收。在恒溫爐中，提高溫度和升溫速率，使分子吸收明顯下降。實(shí)驗(yàn)室原子吸收分光光度計(jì)排名</p></p><br /><p>文章來源地址: 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