高校原子吸收分光光度計(jì)銷售廠家服務(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【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="火焰原子吸收分光光度計(jì)，利用空氣—乙炔測定的元素可達(dá)30多種，若使用氧化亞氮—乙炔火焰，測定的元素可達(dá)70多種，高校原子吸收分光光度計(jì)銷售廠家。但氧化亞氮—乙炔火焰安全性較差，應(yīng)用不普遍?？諝狻胰不鹧嬖游辗止夤舛确?，一般可檢測到PPm"><meta name="keywords" content="高校原子吸收分光光度計(jì)銷售廠家,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 http-equiv="Cache-Control" 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#f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>高校原子吸收分光光度計(jì)銷售廠家,原子吸收分光光度計(jì)</p><p><span>***更新：</span>2021-01-30 07:13:02</p><p><span id="click" >瀏覽次數(shù)：3次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="swnpbdp" 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="ownkwyf" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="etvxev3" class="box"><p><p style="text-indent:25px">火焰原子吸收分光光度計(jì)，利用空氣—乙炔測定的元素可達(dá)30多種，若使用氧化亞氮—乙炔火焰，測定的元素可達(dá)70多種，高校原子吸收分光光度計(jì)銷售廠家。但氧化亞氮—乙炔火焰安全性較差，應(yīng)用不普遍?？諝狻胰不鹧嬖游辗止夤舛确ǎ话憧蓹z測到PPm級（10－6），精密度1％左右。國產(chǎn)的火焰原子吸收分光光度計(jì)，都可配備各種型號的氫化物發(fā)生器（屬電加熱原子化器），利用氫化物發(fā)生器，可測定砷（As）、銻（Sb）、鍺（Ge）、碲（Te）等元素。一般靈敏度在ng／ml級（10－9），高校原子吸收分光光度計(jì)銷售廠家，相對標(biāo)準(zhǔn)偏差2％左右。汞(Hg)可用冷原子吸收法測定，高校原子吸收分光光度計(jì)銷售廠家。原子吸收分光光度計(jì)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(jì)。高校原子吸收分光光度計(jì)銷售廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高校原子吸收分光光度計(jì)銷售廠家,原子吸收分光光度計(jì)" 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(jì)原子化條件：(1)火焰類型和特性:在火焰原子化法中，火焰類型和特性是影響原子化效率的主要因素。對低、中溫元素，使用空氣-乙炔火焰;對高溫元素，宜采用氧化亞氮-乙炔高溫火焰;對分析線位于短波區(qū)(200nm以下)的元素，使用空氣-氫火焰是合適的。對于確定類型的火焰，稍富燃的火焰(燃?xì)饬看笥诨瘜W(xué)計(jì)量)是有利的。對氧化物不十分穩(wěn)定的元素如Cu、Mg、Fe、Co、Ni等，用化學(xué)計(jì)量火焰(燃?xì)馀c助燃?xì)獾谋壤c它們之間化學(xué)反應(yīng)計(jì)量量相近)或貧燃火焰(燃?xì)饬啃∮诨瘜W(xué)計(jì)量)也是可以的。為了獲得所需特性的火焰，需要調(diào)節(jié)燃?xì)馀c助燃?xì)獾谋壤?2)燃燒器的高度選擇:在火焰區(qū)內(nèi)，自由原子的空間分布是不均勻，且隨火焰條件而改變，因此，應(yīng)調(diào)節(jié)燃燒器的高度，以使來自空心陰極燈的光束從自由原子濃度較大的火焰區(qū)域通過，以期獲得高的靈敏度。中國**原子吸收分光光度計(jì)多少錢原子吸收可作為物理和物理化學(xué)的一種實(shí)驗(yàn)手段，對物質(zhì)的一些基本性能進(jìn)行測定和研究。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高校原子吸收分光光度計(jì)銷售廠家,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)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。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(jì)沒有被淘汰至今還在普遍的適用正是因?yàn)樵游盏氖珷t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(jì)的選擇上，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(jì)的配置。</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(jìn)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(dá)到原子化目的。它由加熱電源、保護(hù)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(hù)氣系統(tǒng)是控制保護(hù)氣的。外氣路中的Ar氣沿石墨管外壁流動，以保護(hù)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(hù)已經(jīng)原子化了的原子不再被氧化。原子吸收光譜分析工作原理：利用待測元素的共振輻射。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高校原子吸收分光光度計(jì)銷售廠家,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991236161257/4858141.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)基線漂移測試注意事項(xiàng)：①我國的原子吸收分光光度計(jì)計(jì)量檢定規(guī)程規(guī)定：測試基線漂移時銅燈預(yù)熱3min，這是不妥的。因?yàn)閺睦碚撋现v，銅燈一般在30min左右才能達(dá)到穩(wěn)定狀態(tài)，所以操作時應(yīng)該預(yù)熱30min。②雙光束和單光束的測試結(jié)果不應(yīng)該相同，因?yàn)閺睦碚撋现v，雙光束測試指標(biāo)應(yīng)稍優(yōu)于單光束儀器，否則雙光束儀器沒有意義。③計(jì)量檢定規(guī)程規(guī)定測試基線漂移的時間為30min，這也是欠妥當(dāng)?shù)摹Ｄ壳?，國際上的做法是連續(xù)測試一小時。然而，有些制造廠商采用測試lOmin或測試30min等，來作為基線漂移的測試時間，這是不科學(xué)的。因?yàn)?，如果使用者做一個實(shí)驗(yàn)，在lOmin內(nèi)還未做完，儀器的基線就已經(jīng)漂掉了，這怎么能保證分析測試數(shù)據(jù)的可靠性呢?30min的測試時間也不科學(xué)，因?yàn)榭招年帢O燈是一種氣體放電燈，從物理學(xué)或從氣體發(fā)光的理論來講，一般的氣體放電燈其發(fā)光要在30min左右才能達(dá)到穩(wěn)定。特別是1Omin時間，燈泡的發(fā)光也未達(dá)到較佳值，何況還有其他比較多因素決定了儀器還未達(dá)到測試穩(wěn)定的狀態(tài)。所以，測試穩(wěn)定性應(yīng)該保證一小時才能得出正確的結(jié)果。原子吸收分光光度計(jì)多應(yīng)用于各種氣體，金屬有機(jī)化合物，金屬醇鹽中微量元素的分析。中國**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)使用的是空心陰極燈發(fā)射特征波長的銳線光，選擇性會更好。高校原子吸收分光光度計(jì)銷售廠家</p><p style="text-indent:25px">原子吸收分光光度計(jì)利用待測元素的共振輻射，原子吸收分光光度計(jì)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(jì)。原子吸收分光光度計(jì)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(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(diǎn)。普遍應(yīng)用于各種氣體，金屬有機(jī)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。高校原子吸收分光光度計(jì)銷售廠家</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3078389.html</p></div></div></div></div></div><div id="r3ydkrd" class="page-right twoColRt"><div id="xmofmi7" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="eiprdpb" 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(qiáng) 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(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="i8gikwn" 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