甲醛原子吸收分光光度計(jì)對(duì)比客戶至上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="原子吸收分光光度計(jì)的優(yōu)點(diǎn)是：原子化效率高，在可調(diào)的高溫下試樣利用率達(dá)100%，靈敏度高，試樣用量少，適用于難熔元素的測(cè)定。缺點(diǎn)是：試樣組成不均勻性的影響較大，測(cè)定精密度較低，共存化合物的干擾比火焰原子化法大，干擾背景比較嚴(yán)重，一般都需要校正"><meta name="keywords" content="甲醛原子吸收分光光度計(jì)對(duì)比,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" content="OBVzrC9aaQ" /> <meta 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class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988188495975/1516361.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="sceb8qx" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988188495975/1516361.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="wra8szl" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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>甲醛原子吸收分光光度計(jì)對(duì)比,原子吸收分光光度計(jì)</p><p><span>***更新：</span>2021-01-15 09:13:34</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="o8jdugn" 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(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="7bd3ls7" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="qfh4dkm" class="box"><p><p style="text-indent:25px">原子吸收分光光度計(jì)的優(yōu)點(diǎn)是：原子化效率高，在可調(diào)的高溫下試樣利用率達(dá)100%，靈敏度高，試樣用量少，適用于難熔元素的測(cè)定。缺點(diǎn)是：試樣組成不均勻性的影響較大，測(cè)定精密度較低，共存化合物的干擾比火焰原子化法大，干擾背景比較嚴(yán)重，一般都需要校正背景。原子吸收光譜分析現(xiàn)已多用于各個(gè)分析領(lǐng)域，主要有四個(gè)方面：理論研究；元素分析；有機(jī)物分析；金屬化學(xué)形態(tài)分析。理論研究中的應(yīng)用：原子吸收可作為物理和物理化學(xué)的一種實(shí)驗(yàn)手段，對(duì)物質(zhì)的一些基本性能進(jìn)行測(cè)定和研究。電熱原子化器容易做到控制蒸發(fā)過(guò)程和原子化過(guò)程，所以用它測(cè)定一些基本參數(shù)有很多優(yōu)點(diǎn)。用電熱原子化器所測(cè)定的一些有元素離開機(jī)體的活化能、氣態(tài)原子擴(kuò)散系數(shù)、解離能，甲醛原子吸收分光光度計(jì)對(duì)比、振子強(qiáng)度、光譜線輪廓的變寬、溶解度，甲醛原子吸收分光光度計(jì)對(duì)比，甲醛原子吸收分光光度計(jì)對(duì)比、蒸氣壓等。原子吸收分光光度計(jì)通過(guò)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)。甲醛原子吸收分光光度計(jì)對(duì)比</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="甲醛原子吸收分光光度計(jì)對(duì)比,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)測(cè)土壤巖石中砷銻鉍汞時(shí)常見問(wèn)題的剖析：氫化物的產(chǎn)生條件與技術(shù)指標(biāo)是作業(yè)曲線是否滿足要求的條件，測(cè)驗(yàn)不同的元素應(yīng)設(shè)定不同的氫化物的產(chǎn)生條件，條件的設(shè)定符合儀器使用說(shuō)明書中給定的推薦剖析條件。在測(cè)驗(yàn)規(guī)范系列時(shí)，如儀器靈敏度不符合要求，則應(yīng)加大負(fù)高壓或加大電流，從頭測(cè)定空白，然后測(cè)規(guī)范系列。別的，當(dāng)規(guī)范系列含量太低時(shí)，該儀器靈敏度達(dá)不到。規(guī)范貯備液主張購(gòu)買國(guó)家規(guī)范物質(zhì)中間制造的規(guī)范溶液。在配置的過(guò)程中應(yīng)注意所用水、試劑、容器的污染問(wèn)題，所用容器應(yīng)該在使用前用硝酸溶液浸泡24小時(shí)，沖凈后使用。規(guī)范溶液在長(zhǎng)期貯備過(guò)程中也會(huì)出現(xiàn)蒸發(fā)，因而需要確保規(guī)范溶液在有效期之內(nèi)。甲醛原子吸收分光光度計(jì)對(duì)比元素在熱解石墨爐中被加熱原子化，成為基態(tài)原子蒸汽。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="甲醛原子吸收分光光度計(jì)對(duì)比,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">在原子化進(jìn)程中，用高達(dá)數(shù)百安培電流加熱石墨管，在一秒鐘內(nèi)使之達(dá)到2000℃～3000℃，樣品在如此短的時(shí)刻被加熱蒸騰、解離成分子、原子蒸氣是一個(gè)急速分散脹大改變進(jìn)程。石墨管內(nèi)待測(cè)元素原子和共存物質(zhì)蒸氣的濃度具有激烈的時(shí)空特性，即管內(nèi)不同點(diǎn)的濃度隨時(shí)刻而急速改變，同一時(shí)刻不同方位的濃度也不同。用快速響應(yīng)檢測(cè)電路系統(tǒng)取得的原子吸收和背景吸收信號(hào)是兩條隨時(shí)刻改變的曲線，這便是原子化信號(hào)的瞬態(tài)性。這一點(diǎn)與火焰法的安穩(wěn)信號(hào)完全不同。此外，原子化進(jìn)程的瞬態(tài)信號(hào)還受制于石墨管的時(shí)刻和空間溫度特性，此乃人們感興趣也是研究很多的問(wèn)題之一。</p><p style="text-indent:25px">原子吸收分光光度計(jì)采用新的電子技術(shù)，使儀器顯示數(shù)字化、進(jìn)樣自動(dòng)化，計(jì)算機(jī)數(shù)據(jù)處理系統(tǒng)使整個(gè)分析實(shí)現(xiàn)自動(dòng)化。我國(guó)在1963年開始對(duì)原子吸收分光光度計(jì)有一般性介紹。1965年復(fù)旦大學(xué)電光源實(shí)驗(yàn)室和冶金工業(yè)部有色金屬研究所分別研制成功空心陰極燈光源。1970年北京科學(xué)儀器廠試制成WFD-Y1型單光束原子吸收分光光度計(jì)?，F(xiàn)在我國(guó)已有多家企業(yè)生產(chǎn)多種型號(hào)、性能較先進(jìn)的原子吸收分光光度計(jì)。原子吸收分光光度計(jì)應(yīng)用也有一定的局限性，即每種待測(cè)元素都要有一個(gè)能發(fā)射特定波長(zhǎng)譜線的光源。原子吸收分光光度計(jì)汞(Hg)可用冷原子吸收法測(cè)定。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="甲醛原子吸收分光光度計(jì)對(duì)比,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988163192494/7997740.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)是使用多的原子化器，但它很大的缺陷是原子化效率不高，原子蒸氣停留時(shí)刻短，因而火焰中的自在原子濃度很低。原因是霧化效率低，待測(cè)物遭到大量氣體的稀釋，以及金屬原子在火焰中易受氧化作用生成熱安穩(wěn)的難熔氧化物。另一個(gè)存在的問(wèn)題是火焰中的化學(xué)反應(yīng)不易控制，造成火焰溫度不安穩(wěn)，火焰各部分的溫度也是不均勻的應(yīng)非原子吸收分光光度計(jì)能夠進(jìn)步原子化效率，進(jìn)步測(cè)量的靈敏度。進(jìn)樣量過(guò)小，吸收信號(hào)弱，不便于測(cè)量；進(jìn)樣量過(guò)大，在火焰原子化法中，對(duì)火焰發(fā)生冷卻效應(yīng)，在原子吸收分光光度計(jì)中，會(huì)增加除殘的困難。在實(shí)際作業(yè)中，應(yīng)測(cè)定吸光度隨進(jìn)樣量的變化，到達(dá)很滿意的吸光度的進(jìn)樣量，即為應(yīng)挑選的進(jìn)樣量。原子吸收分光光度計(jì)計(jì)算機(jī)數(shù)據(jù)處理系統(tǒng)使整個(gè)分析實(shí)現(xiàn)自動(dòng)化。甲醛原子吸收分光光度計(jì)對(duì)比</p><p style="text-indent:25px">原子吸收分光光度計(jì)在分析化學(xué)中的應(yīng)用未能引起重視。甲醛原子吸收分光光度計(jì)對(duì)比</p><p style="text-indent:25px">石墨爐原子吸收分光光度計(jì)，可以測(cè)定近50種元素。石墨爐法，進(jìn)樣量少，靈敏度高，有的元素也可以分析到pg/mL級(jí)。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(duì)空心陰極燈發(fā)射的特征輻射進(jìn)行選擇性吸收。在一定濃度范圍內(nèi)，其吸收強(qiáng)度與試液中被測(cè)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(qiáng)度；I0為發(fā)射光強(qiáng)度；T為透射比；L為光通過(guò)原子化器光程(長(zhǎng)度)，每臺(tái)儀器的L值是固定的；C是被測(cè)樣品濃度；所以A=KC。甲醛原子吸收分光光度計(jì)對(duì)比</p><p style="text-indent:25px">上海儀電分析儀器有限公司致力于儀器儀表，是一家生產(chǎn)型公司。公司自成立以來(lái)，以質(zhì)量為發(fā)展，讓匠心彌散在每個(gè)細(xì)節(jié)，公司旗下分光光度計(jì)，氣相色譜，原子吸收，食品安全深受客戶的喜愛。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠(chéng)信為本的理念，打造儀器儀表良好品牌。儀電分析憑借創(chuàng)新的產(chǎn)品、專業(yè)的服務(wù)、眾多的成功案例積累起來(lái)的聲譽(yù)和口碑，讓企業(yè)發(fā)展再上新高。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2858126.html</p></div></div></div></div></div><div id="bq2r27p" class="page-right twoColRt"><div id="gq8rlmz" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="vpmg2df" class="recomPic likePro"><a 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