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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="cq9bp96" class="page-proshow02"><p class="title">詳細說明</p><div id="i4lobek" class="box"><p><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，應根據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，三用原子吸收分光光度計生產廠家，又由于氧化劑充分，燃燒完全，火焰具有氧化性氣氛，三用原子吸收分光光度計生產廠家，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，三用原子吸收分光光度計生產廠家、稀土元素等。原子吸收光譜分析中，光譜重疊干擾的幾率小，可以允許使用較寬的狹縫。三用原子吸收分光光度計生產廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="三用原子吸收分光光度計生產廠家,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988246893719/5353894.png"></div><p style="text-indent:25px">石墨爐原子吸收分光光度計影響火焰原子吸收光譜儀靈敏度的因素有?1、霧化器：霧化器作用是將試液霧化。它是原子吸收光譜儀重要部件，其性能對測定靈敏度、精密度和化學物理干擾等產生明顯影響。霧化器噴霧越穩(wěn)定，霧滴越微小均勻，霧化效率也就越高，相應靈敏度越高，精密度越好，化學物理干擾越小。霧化器調節(jié)目前都是通過人工調節(jié)撞擊球和毛細管之間相對位置來實現。石墨爐原子吸收分光光度計檢測人員應將霧化器調節(jié)到霧滴細小而均勻，較好是霧滴在撞擊球周圍均勻分布。2、試液提升量：提升量大小影響到靈敏度高低。過高或過低的提升量會使霧化器霧化不穩(wěn)定。每個廠家儀器提升量范圍各不相同，各自有一定變化范圍。增大提升量辦法有：(1)增大助燃氣流量，這樣增大負壓使提升量增大。(2)縮短進樣管長度，縮短進樣管長度使管阻力減小，使試液流量增大。相反，如想降低提升量，則可以減小助燃氣流量或加長進樣管長度。**原子吸收分光光度計銷售廠家原子吸收分光光度計汞(Hg)可用冷原子吸收法測定。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="三用原子吸收分光光度計生產廠家,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">原子吸收分光光度計的實際應用：1．理論研究中的應用：原子吸收可作為物理和物理化學的一種實驗手段，對物質的一些基本性能進行測定和研究。電熱原子化器容易做到控制蒸發(fā)過程和原子化過程，所以用它測定一些基本參數有比較多優(yōu)點。用電熱原子化器所測定的一些有元素離開機體的活化能、氣態(tài)原子擴散系數、解離能、振子強度、光譜線輪廓的變寬、溶解度、蒸氣壓等。2．元素分析中的應用：原子吸收光譜分析，由于其靈敏度高、干擾少、分析方法簡單快速，現已普遍地應用于工業(yè)、農業(yè)、生化、地質、冶金、食品、環(huán)保等各個領域，目前原子吸收已成為金屬元素分析的強有力工具之一，而且在許多領域已作為標準分析方法。原子吸收光譜分析的特點決定了它在地質和冶金分析中的重要地位，它不只取代了許多一般的濕法化學分析，而且還與X-射線熒光分析，甚至與中子活化分析有著同等的地位。</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、光源:紫外可見分光光度計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。2、檢測器：紫外可見分光光度計一般使用光電管來檢測。而原子吸收分光光度計使用的是光電倍增管，分辨力比光電管強。3、應用：原子吸收分光光度計是屬于原子光譜。紫外可見分光光度計屬于分子光譜，兩者都符合朗伯-比耳定律；4、檢出限:原子吸收分光光度計檢出限低，火焰原子吸收法的檢出限可達到ppb級。紫外可見分光光度計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不一樣。原子吸收分光光度計在分析化學中的應用未能引起重視。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="三用原子吸收分光光度計生產廠家,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">火焰原子吸收分光光度計使用的注意事項：1、應放在干燥的房間內，使用時放置在堅固平穩(wěn)的工作臺上，室內照明不宜太強。熱天時不能用電扇直接向儀器吹風，防止燈泡燈絲發(fā)亮不穩(wěn)定。2、為了防止光電管疲勞，不測定時必須將試樣室蓋打開，使光路切斷，以延長光電管的使用壽命。、取拿比色皿時，手指只能捏住比色皿的毛玻璃面，而不能碰比色皿的光學表面。4、比色皿不能用堿溶液或氧化性強的洗滌液洗滌，也不能用毛刷清洗。比色皿外壁附著的水或溶液應用擦鏡紙或細而軟的吸水紙吸干，不要擦拭，以免損傷它的光學表面。5、使用光度計前，應該首先了解本儀器的結構和工作原理，以及各個操縱旋鈕之功能。在未按通電源之前，原子吸收分光光度計應該對火焰原子吸收分光光度計的安全性能進行檢查，電源接線應牢固，通電也要良好，各個調節(jié)旋鈕的起始位置應該正確，然后再按通電源開關。6、長期不用時，需用將儀器使用防護罩罩住。原子吸收分光度計分析樣品優(yōu)點：準確度好。國產**原子吸收分光光度計生產廠家</p><p style="text-indent:25px">完成試樣原子化所用的設備稱為原子化器或原子化系統(tǒng)。三用原子吸收分光光度計生產廠家</p><p style="text-indent:25px">隨著儀器儀表和計算機的完美結合，為了更好的滿足人們對精神世界的需求，體驗多維世界給人們帶來的**，儀器儀表的虛擬化開始發(fā)展。身臨其境接受客觀實物，給美又增添了一絲創(chuàng)意。進一步提升我國儀器儀表技術和水平，有限責任公司企業(yè)要順應產業(yè)發(fā)展潮流，在穩(wěn)固常規(guī)品種的同時，進一步發(fā)展智能儀器儀表，提升產業(yè)數字化、智能化、集成化水平。工業(yè)領域轉型升級、提升發(fā)展質量等有利于儀器儀表行業(yè)的發(fā)展；**安全、社會安全、產業(yè)和信息安全等需要自主、分光光度計，氣相色譜，原子吸收，食品安全裝備，成為全社會共識；為迎接生產型百年未有之大變局，行家認為，要重新定義中國在世界經濟版圖中的地位，要順應形勢實現制造升級。以華立集團在境外開發(fā)“中國工業(yè)園”的成功案例來闡述，跨國經營要成為企業(yè)主動的戰(zhàn)略選擇，在不確定性中更好地活下去，以全球化視野看問題，很多困惑在全球化過程中會迎刃而解。三用原子吸收分光光度計生產廠家</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3108488.html</p></div></div></div></div></div><div id="oupg962" class="page-right twoColRt"><div id="zml1l4p" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="hnto12a" 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配件哪家強信息推薦自業(yè)物資供應" class="vcenter" 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