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clearfix tcPro"><section class="home-main container clearfix"><div id="zdac3zt" class="twoCol"><div id="xh3wq77" class="page-proshow clearfix"><p class="current"> 當前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應</a>?<a href="http://www.cdcfah.com/cp/first-_yiqiyibiao/">儀器儀表</a>?<a href="http://www.cdcfah.com/cp/second-yiqiyibiao_fenxiyiqi/">分析儀器</a>?<a href="http://www.cdcfah.com/cp/third-fenxiyiqi_ysfxyq/">元素分析儀器</a>?分析原子吸收分光光度計選擇服務為先上海儀電分析儀器供應</p><div id="ymebdkw" class="leftbox clearfix"><h1>分析原子吸收分光光度計選擇服務為先上海儀電分析儀器供應</h1><div id="pz3vh79" class="proBig"><div id="icebiur" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991291551872/1267970.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="wvsuw8d" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991291551872/1267970.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="3x3olip" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</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)品關鍵詞：</span>分析原子吸收分光光度計選擇,原子吸收分光光度計</p><p><span>***更新：</span>2021-01-28 00:21:47</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="f33jfmo" 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: </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="32t7o2b" class="page-proshow02"><p class="title">詳細說明</p><div id="w82fc33" class="box"><p><p style="text-indent:25px">原子吸收分光光度計，有火焰原子吸收分光光度計和帶石墨爐的原子吸收分光光度計兩種。前者原子化的溫度在2100℃～2400℃之間，后者在2900℃～3000℃之間?；鹧嬖游辗止夤舛扔?，利用空氣—乙炔測定的元素可達30多種，若使用笑氣—乙炔火焰，測定的元素可達70多種。但笑氣—乙炔火焰安全性較差，客戶應用不普遍，基本上實驗室都取締了?？諝狻胰不鹧嬖游辗止夤舛确?，一般可檢測到PPm級（10-6），精密度1%左右，分析原子吸收分光光度計選擇。國產(chǎn)的火焰原子吸收分光光度計，AA-1800C，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），相對標準偏差2%左右。汞(Hg)可用冷原子吸收法測定。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，分析原子吸收分光光度計選擇，進樣量少，靈敏度高，分析原子吸收分光光度計選擇，有的元素也可以分析到pg/ml級。原子吸收光譜儀分析中的干擾效應：電離干擾。分析原子吸收分光光度計選擇</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="分析原子吸收分光光度計選擇,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991291551872/1267970.png"></div><p style="text-indent:25px">原子吸收分光光度計中常用的定量辦法：規(guī)范曲線法。規(guī)范曲線法是用規(guī)范物質制造一系列已知濃度的規(guī)范試樣，在規(guī)范條件下，測得每一濃度對應的吸光度值，以吸光度對濃度作圖，制作規(guī)范曲線。在相同條件下測定樣品吸光度，從規(guī)范曲線上讀取樣品濃度。長處：適用范圍廣，快速簡便，合適大批量樣品的測定。缺乏：試驗準確度受基體干擾嚴重。規(guī)范參加法：規(guī)范參加法是在數(shù)個等分的試樣平分別參加呈比例的規(guī)范試樣，然后稀釋到一定體積。根據(jù)測定的吸光度值，制作吸光度A-c（濃度）曲線。用外推法求得稀釋后試樣中待測物的濃度。中國**原子吸收分光光度計比較由于汞的多應用，對大氣中微量汞的測定曾利用原子吸收光譜原理設計了測汞儀。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="分析原子吸收分光光度計選擇,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988163192494/7997740.png"></div><p style="text-indent:25px">原子吸收光譜儀分析中的干擾效應：1.物理干擾：物理干擾是指試樣在轉移、蒸發(fā)和原子化過程中，由于試樣任何物理特性（如粘度、表面張力、密度等）的變化而引起的原子吸收強度下降的效應。物理干擾是非選擇性干擾，對試樣各元素的影響基本是相似的。配制與被測試樣相似組成的標準樣品，是消除物理干擾較常用的方法。在不知道試樣組成或無法匹配試樣時，可采用標準加入法或稀釋法來減小和消除物理干擾。2.化學干擾：化學干擾是由于液相或氣相中被測元素的原子與干擾物質組分之間形成熱力學更穩(wěn)定的化合物，從而影響被測元素化合物的解離及其原子化。磷酸根對鈣的干擾，硅、鈦形成難解離的氧化物、鎢、硼、希土元素等生成難解離的碳化物，從而使有關元素不能有效原子化，都是化學干擾的例子?；瘜W干擾是一種選擇性干擾。</p><p style="text-indent:25px">原子吸收分光光度計剖析是現(xiàn)在很靈敏的方法之一?；鹧嬖游盏南鄬`敏度為ug/ml-ng/ml，無火焰原子吸收分光光度計的肯定靈敏度在10-10-10-14之間。如果采取預富集，可進一步進步剖析靈敏度。因為該方法的靈敏度高，使剖析手續(xù)簡化可直接測定，則縮短剖析周期加快丈量進程。因為靈敏度高，則需樣量少。微量進樣熱核的引進，可使火趣味的需樣量少至20-300ul。無火焰原子吸收分光光度計剖析的需樣量*5–100ul。固體直接進樣石墨爐原子吸收法*需0.005-30mg，這關于實驗來歷困難的剖析是很為有利的。原子吸收分光光度計空氣—乙炔火焰原子吸收分光光度計。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="分析原子吸收分光光度計選擇,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">原子吸收分光光度計可普遍應用于食品、醫(yī)藥、環(huán)境、生物、農(nóng)業(yè)、石油化工、建筑、材料、地質、冶金、科研等領域。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金屬元素而言，火焰原子吸收法簡單而快捷，結果的準確度非常高。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**認為，之所以原子吸收分光光度計沒有被淘汰至今還在普遍的適用正是因為原子吸收的石墨爐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的配置。原子吸收分光光度計原子化條件：程序升溫的條件選擇。環(huán)保原子吸收分光光度計賣價</p><p style="text-indent:25px">我國在1963年開始對原子吸收分光光度計有一般性介紹。分析原子吸收分光光度計選擇</p><p style="text-indent:25px">原子吸收分光光度計噴口氣流通道阻塞：可取下撞擊球帽用反向氣流或水沖刷，也可用注射器灌水沖刷。噴口內管或氣流通道被有機質、積累的灰塵或干涸的鹽類等阻塞，可取下撞擊球帽將噴口刺進加熱或發(fā)煙的硫酸－重鉻酸鉀溶液中幾秒鐘，冷后用水沖刷（留意：不行使洗液進入霧化器內部），運用半年以上或發(fā)現(xiàn)流量削減，也應照此處理。原子吸收分光光度計每次運用結束，用蒸餾水吸噴2～3分鐘（不行用自來水防止溶液干涸阻塞）。工作室溫不行低于10度，不然噴口的降溫效果可使溶液結冰阻塞霧化器。分析原子吸收分光光度計選擇</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3038020.html</p></div></div></div></div></div><div id="zoa88wt" class="page-right 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