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</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="n33ez9m" class="page-proshow02"><p class="title">詳細說明</p><div id="celnpyc" class="box"><p><p style="text-indent:25px">原子吸收分光光度計現(xiàn)已多用于各個剖析領域，高效原子吸收分光光度計怎么樣，主要有四個方面:理論研究;元素剖析;有機物剖析;金屬化學形狀剖析，高效原子吸收分光光度計怎么樣，理論研究中的使用:原子吸收可作為物理和物理化學的一種實驗手段，高效原子吸收分光光度計怎么樣，對物質的一些根本性能進行測定和研究。電熱原子化器簡單做到控制蒸發(fā)進程和原子化進程，所以用它測定一些根本參數有很多長處。用電熱原子化器所測定的一些有元素脫離機體的活化能、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。原子化往往是將溶液噴霧到火焰中去實現(xiàn)。高效原子吸收分光光度計怎么樣</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高效原子吸收分光光度計怎么樣,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988134237392/1056352.png"></div><p style="text-indent:25px">原子吸收分光光度計和ICP的比較：原理：原子吸收分光光度計：經過測定某一具有特定波長的光經過試樣原子蒸氣后被吸收的多少來測定被測元素的含量的一種方法。選擇性強，簡潔、快速。因為其選用銳線光源，樣品不需要經繁瑣的分離，可在同一溶液中直接測定多種元素，測定一個元素只需要數分鐘，分析操作簡潔、迅速?？垢蓴_能力強。原子吸收線數目少，光譜干擾少，一般不存在共存元素的光譜堆疊干擾。應用范圍廣?？蓽y60多種元素；既能用于微量分析又能用于超微量分析。另外，還可用直接的辦法測定非金屬元素和有機化合物。高性能原子吸收分光光度計廠家供應原子吸收分光光度計具有靈敏度高及選擇性好兩大主要優(yōu)點。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高效原子吸收分光光度計怎么樣,原子吸收分光光度計" 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的優(yōu)點是：（1）檢出限低，靈敏度高。火焰原子吸收法的檢出限可達10-9g（ppm級），石墨爐原子吸收法更高，可達ppb級。（2）丈量精度好?；鹧嬖游辗y定中等和高含量元素的相對偏差可小于0.01，丈量精度已接近于經典化學辦法。石墨爐原子吸收法的丈量精度一般為3-5。樣品由載氣（氬）帶入霧化系統(tǒng)進行霧化后，以氣溶膠形式進入等離子體的軸向通道，在高溫文惰性氣氛中被充沛蒸騰、原子化、電離和激起，發(fā)射出所含元素的特征譜線。依據特征譜線的存在與否，鑒別樣品中是否含有某種元素（定性分析）；根依據特征譜線強度確定樣品中相應元素的含量（定量分析）。</p><p style="text-indent:25px">石墨爐原子吸收分光光度計，可以測定近50種元素。石墨爐法，進樣量少，靈敏度高，有的元素也可以分析到pg/mL級。元素在熱解石墨爐中被加熱原子化，成為基態(tài)原子蒸汽，對空心陰極燈發(fā)射的特征輻射進行選擇性吸收。在一定濃度范圍內，其吸收強度與試液中被測元素的含量成正比。其定量關系可用郎伯-比耳定律，A=-lgI/Io=-lgT=KCL，式中I為透射光強度；I0為發(fā)射光強度；T為透射比；L為光通過原子化器光程(長度)，每臺儀器的L值是固定的；C是被測樣品濃度；所以A=KC。石墨爐原子吸收分光光度計，可以測定近50種元素。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高效原子吸收分光光度計怎么樣,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991311337342/3521940.png"></div><p style="text-indent:25px">你知道怎樣正確挑選原子吸收分光光度計嗎？1.剖析線挑選：通常選用共振吸收線為剖析線，測定高含量元素時，能夠選用靈敏度較低的非共振吸收線為剖析線。As、Se等共振吸收線位于200nm以下的遠紫外區(qū)，火焰組分對其有明顯吸收，故用火焰原子吸收法測定這些元素時，不宜選用共振吸收線為剖析線。2.狹縫寬度挑選：狹縫寬度影響光譜通帶寬度與檢測器接受的能量。原子吸收分光光度計中，光譜堆疊干擾的幾率小，能夠答應運用較寬的狹縫。調節(jié)不同的狹縫寬度，測定吸光度隨狹縫寬度而變化，當有其它的譜線或非吸收光進入光譜通帶內，吸光度將當即減小。不引起吸光度減小的很大狹縫寬度，即為應選取的合適的狹縫寬度。原子吸收分光光度計一般靈敏度在ng/ml級（10-9），相對標準偏差2%左右。高性能原子吸收分光光度計廠家供應</p><p style="text-indent:25px">火焰原子化法的優(yōu)點是：火焰原子化法的操作簡便，重現(xiàn)性好，有效光程大。高效原子吸收分光光度計怎么樣</p><p style="text-indent:25px">原子吸收分光光度計，所謂微量元素，在環(huán)境地球化學中，指*占地球組成部分的0.01的60余種元素，微量元素分析儀的合量一般在1×10-8~1×108。在醫(yī)學領域從人體結構來看，占人體總重量萬分之一以下者即為微量元素。什么是需微量元素和條性微量元素從營養(yǎng)化學、毒理學和環(huán)境污染等研討角度出發(fā)將微量元素分紅需微量元素或營養(yǎng)微量元素和毒性微量元素。原子吸收分光光度計微量元素分析儀廠家生產的微量元素分析儀需徵量元素是指能維持人體正常功用或結構所需的微量元素，每日只需攝入Q.01g以下，即能滿足人體生理功用的需求。高效原子吸收分光光度計怎么樣</p><p style="text-indent:25px">上海儀電分析儀器有限公司是一家儀器儀表、電子元器件及相關的系統(tǒng)集成的生產、服務及銷售，計算機軟件開發(fā)及銷售，從事貨物進出口及技術進出口業(yè)務。【依法須經批準的項目，經相關部門批準后方可開展經營活動】儀器儀表、電子元器件及相關的系統(tǒng)集成的生產、服務及銷售，計算機軟件開發(fā)及銷售，從事貨物進出口及技術進出口業(yè)務。【依法須經批準的項目，經相關部門批準后方可開展經營活動】的公司，是一家集研發(fā)、設計、生產和銷售為一體的專業(yè)化公司。公司自創(chuàng)立以來，投身于分光光度計，氣相色譜，原子吸收，食品安全，是儀器儀表的主力軍。儀電分析不斷開拓創(chuàng)新，追求出色，以技術為先導，以產品為平臺，以應用為重點，以服務為保證，不斷為客戶創(chuàng)造更高價值，提供更優(yōu)服務。儀電分析始終關注儀器儀表行業(yè)。滿足市場需求，提高產品價值，是我們前行的力量。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/2771959.html</p></div></div></div></div></div><div id="jy83suw" class="page-right 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