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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>學(xué)校原子吸收分光光度計(jì)報(bào)價(jià),原子吸收分光光度計(jì)</p><p><span>***更新：</span>2021-02-06 06:11:07</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="88x4qmo" 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="veqdpb8" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="mvctvmy" class="box"><p><p style="text-indent:25px">原子吸收分光光度計(jì)作用：原子吸收分光光度計(jì)的作用是進(jìn)樣器把溶液中的金屬離子提升到原子化器，用原子化器（石墨爐原子化器或者火焰原子化器）把液體通過(guò)高溫的方式轉(zhuǎn)化為氣態(tài)原子蒸汽，由于元素不同，導(dǎo)致特征譜線不同，不同的原子會(huì)吸收其特征波長(zhǎng)的光子，學(xué)校原子吸收分光光度計(jì)報(bào)價(jià)。這時(shí)候從光源（空心陰極燈）發(fā)出來(lái)的特征譜線通過(guò)原子蒸汽被吸收一部分，學(xué)校原子吸收分光光度計(jì)報(bào)價(jià)，比較原始光強(qiáng)（I0）和吸收后的光強(qiáng)(I)，用比爾定律得出吸收比率，學(xué)校原子吸收分光光度計(jì)報(bào)價(jià)，進(jìn)而用標(biāo)準(zhǔn)曲線法或者標(biāo)準(zhǔn)加入法計(jì)算濃度。原子吸收分光光度計(jì)，有火焰原子吸收分光光度計(jì)和帶石墨爐的原子吸收分光光度計(jì)兩種。學(xué)校原子吸收分光光度計(jì)報(bào)價(jià)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="學(xué)校原子吸收分光光度計(jì)報(bào)價(jià),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)按光束形成可分為單光束（指從光源中發(fā)出的光只以單一光束的形式通過(guò)原子化器、單色器和檢測(cè)系統(tǒng)）和雙光束（指從光源發(fā)出的光被切光器分成兩束強(qiáng)度相等的光，一束為樣品光束通過(guò)原子化器被基態(tài)原子部分吸收；另一束只作為參比光束，不通過(guò)原子化器，其光強(qiáng)度不被減弱）兩類；按包含“單獨(dú)”的分光系統(tǒng)和檢測(cè)系統(tǒng)的數(shù)目又可分為單道（指儀器只有一個(gè)光源，一個(gè)單色器，一個(gè)顯示系統(tǒng)，每次只能測(cè)一種元素）、雙道（指儀器有兩個(gè)不同光源，兩個(gè)單色器兩個(gè)檢測(cè)顯示系統(tǒng)）和多道。目前普遍使用的是單道單光束或單道雙光束原子吸收分光光度計(jì)。原子吸收分光光度計(jì)型號(hào)繁多，不同型號(hào)儀器性能和應(yīng)用范圍不同。甲醇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)的上方必需準(zhǔn)備一個(gè)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="學(xué)校原子吸收分光光度計(jì)報(bào)價(jià),原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988105282341/1372565.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)基線漂移測(cè)試注意事項(xiàng)：①我國(guó)的原子吸收分光光度計(jì)計(jì)量檢定規(guī)程規(guī)定：測(cè)試基線漂移時(shí)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(shí)應(yīng)該預(yù)熱30min。②雙光束和單光束的測(cè)試結(jié)果不應(yīng)該相同，因?yàn)閺睦碚撋现v，雙光束測(cè)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(cè)試基線漂移的時(shí)間為30min，這也是欠妥當(dāng)?shù)?。目前，?guó)際上的做法是連續(xù)測(cè)試一小時(shí)。然而，有些制造廠商采用測(cè)試lOmin或測(cè)試30min等，來(lái)作為基線漂移的測(cè)試時(shí)間，這是不科學(xué)的。因?yàn)椋绻褂谜咦鲆粋€(gè)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(cè)試數(shù)據(jù)的可靠性呢?30min的測(cè)試時(shí)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(lái)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(shí)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(cè)試穩(wěn)定的狀態(tài)。所以，測(cè)試穩(wěn)定性應(yīng)該保證一小時(shí)才能得出正確的結(jié)果。</p><p style="text-indent:25px">我國(guó)原子吸收商品儀器的生產(chǎn)已有30年，目前國(guó)內(nèi)外生產(chǎn)廠家有十多家，幾十種型號(hào)。對(duì)此，用戶要知己知彼。首先要明確購(gòu)買儀器主要解決什么問題，分析要求是什么。因?yàn)椴煌姆治鲆螅瑢?duì)儀器的功能要求會(huì)有不同的側(cè)重，而任何一臺(tái)儀器也不是全能的。其次，是要考慮適用性和經(jīng)濟(jì)性。要結(jié)合自己的經(jīng)濟(jì)實(shí)力，技術(shù)水平和人員素質(zhì)選擇能滿足自己工作要求的型號(hào)。第三，對(duì)新組建原子光譜實(shí)驗(yàn)室的用戶，還要注意必須有輔助設(shè)備的投入，如樣品的前處理設(shè)備的購(gòu)置，實(shí)驗(yàn)室環(huán)境條件的建設(shè)，如穩(wěn)壓電源、空調(diào)、清潔的房間以及地線等。有的用戶不注意這些基本條件的準(zhǔn)備，就匆匆購(gòu)買儀器，結(jié)果儀器購(gòu)買后長(zhǎng)期不能投產(chǎn)，不能發(fā)揮儀器的效益。第四，注意人才培養(yǎng)，原子吸收光譜儀屬于大型精密儀器，樣品前處理以及操作相對(duì)較為復(fù)雜，建議用戶一定配備具有中專以上文化水平的人，較好是分析化學(xué)專業(yè)人才，如果這方面不注意，也不能使儀器盡快發(fā)揮作用。第五，售后服務(wù)要有保障，如安裝、培訓(xùn)、耗材的供給等等。儀器應(yīng)防止日光直射、煙塵、純凈氣流及水蒸氣的影響，避免腐蝕氣體的干擾。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="學(xué)校原子吸收分光光度計(jì)報(bào)價(jià),原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988150712025/4463747.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(zhǎng)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(zhǎng)?？招年帢O燈（hollowcathodelamp，HCL）、無(wú)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(wú)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＃瑔卧氐目招年帢O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(guó)生產(chǎn)的空心陰極燈可以滿足國(guó)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。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。甲醇原子吸收分光光度計(jì)生產(chǎn)廠家</p><p style="text-indent:25px">火焰原子化法的優(yōu)點(diǎn)是：火焰原子化法的操作簡(jiǎn)便，重現(xiàn)性好，有效光程大。學(xué)校原子吸收分光光度計(jì)報(bào)價(jià)</p><p style="text-indent:25px">原子吸收分光光度計(jì)儀器分類：1、火焰原子化法的優(yōu)點(diǎn)是：火焰原子化法的操作簡(jiǎn)便，重現(xiàn)性好，有效光程大，對(duì)大多數(shù)元素有較高靈敏度，因此應(yīng)用普遍。缺點(diǎn)是：原子化效率低，靈敏度不夠高，而且一般不能直接分析固體樣品；2、石墨爐原子化器的優(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。學(xué)校原子吸收分光光度計(jì)報(bào)價(jià)</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3188859.html</p></div></div></div></div></div><div id="hln3qsz" class="page-right twoColRt"><div id="xroa8h2" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="aebsxta" 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) 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