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clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="kip3hfr" class="twoCol"><div id="8dzypw7" 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>?工業(yè)原子吸收分光光度計排行鑄造輝煌上海儀電分析儀器供應</p><div id="bzqcovm" class="leftbox clearfix"><h1>工業(yè)原子吸收分光光度計排行鑄造輝煌上海儀電分析儀器供應</h1><div id="8njqcjv" class="proBig"><div id="82qvsev" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988105282341/1372565.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="fov2awn" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988105282341/1372565.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="8pqxofm" 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(guān)鍵詞：</span>工業(yè)原子吸收分光光度計排行,原子吸收分光光度計</p><p><span>***更新：</span>2021-01-31 04:12:57</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="8a8k2b7" 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="87wiu2y" class="page-proshow02"><p class="title">詳細說明</p><div id="k7dfwfb" class="box"><p><p style="text-indent:25px">火焰中有兩種以上原子的吸收線與光源發(fā)射的剖析線相堆疊時產(chǎn)生臨近線干擾，這種干擾使結(jié)果偏高。當剖析元素的吸收線和共存元素的吸收線完整堆疊，工業(yè)原子吸收分光光度計排行，而剖析元素的含量比較低時，測得的只是共存元素的吸收信號。當剖析元素的剖析線中心位置和共存元素的吸收線的中心位置稍有偏離，但仍有相當水平的堆疊，此時得于的吸收信號仍有比較大一局部是共存元素產(chǎn)生的，工業(yè)原子吸收分光光度計排行。當共存元素的吸收線和剖析元素的吸收線稍有堆疊時，吸收信號中仍有小局部是共存元素產(chǎn)生的。只要剖析元素的吸收線和共存元素的吸收線完整別離時，共存元素才不產(chǎn)生干擾。Co253.649對Hg253.652r的干擾是典型的吸收線堆疊干擾，工業(yè)原子吸收分光光度計排行?；鹧嬗卸喾N火焰，目前普遍應用的是空氣—乙炔火焰。工業(yè)原子吸收分光光度計排行</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="工業(yè)原子吸收分光光度計排行,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">目前原子吸收法已用來測定地質(zhì)樣品中70多種元素，并且大部分能夠達到足夠的靈敏度和比較好的精密度。鋼鐵、合金和高純金屬中多種痕量元素的分析現(xiàn)在也多用原子吸收法。原子吸收在食品分析中越來越普遍。食品和飲料中的20多種元素已有滿意的原子吸收分析方法。生化和臨床樣品中必需元素和有害元素的分析現(xiàn)已采用原子吸收法。有關(guān)石油產(chǎn)品、陶瓷、農(nóng)業(yè)樣品、藥物和涂料中金屬元素的原子吸收分析的文獻報道近些年來越來越多。水體和大氣等環(huán)境樣品的微量金屬元素分析已成為原子吸收分析的重要領域之一。利用間接原子吸收法尚可測定某些非金屬元素。工業(yè)原子吸收分光光度計排行原子吸收分光光度計是屬于原子光譜。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="工業(yè)原子吸收分光光度計排行,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991326259040/7441452.png"></div><p style="text-indent:25px">理論研討和實驗結(jié)果標明，干擾的大小取決于吸收線堆疊水平，干擾元素的濃度及其靈活度。當兩種元素的吸收線的波長差小于0.03nm時，則以為吸收線堆疊干擾是嚴重的。若堆疊的吸收線是靈活線，即便相差0.1nm，干擾也會明顯表現(xiàn)出來。當然這種干擾還和干擾元素的濃度及單色儀的分辨率有關(guān)。有一些譜線，在理論上是堆疊線，但實驗中并沒有察看到干擾。有可能是干擾元素在測定條件下原子化效率低而未能產(chǎn)生足夠的基態(tài)原子，也可能這些干擾元素的吸收線靈活度比較低，所以在通常狀況下表現(xiàn)不出來。消弭這種干擾普通是選用其它的剖析線或預別離干擾元素。</p><p style="text-indent:25px">原子吸收分光光度計原子化條件：(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(燃氣量大于化學計量)是有利的。對氧化物不十分穩(wěn)定的元素如Cu、Mg、Fe、Co、Ni等，用化學計量火焰(燃氣與助燃氣的比例與它們之間化學反應計量量相近)或貧燃火焰(燃氣量小于化學計量)也是可以的。為了獲得所需特性的火焰，需要調(diào)節(jié)燃氣與助燃氣的比例。(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。為便于操作與維修，實驗臺周圍應留出足夠的空間。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="工業(yè)原子吸收分光光度計排行,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(zhuǎn)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(zhì)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(guān)元素不能有效原子化，都是化學干擾的例子。化學干擾是一種選擇性干擾。原子吸收分光光度計分析速度較快，操作簡便，半個小時內(nèi)能連續(xù)測定幾十個試樣中的5、6種元素。手持原子吸收分光光度計生產(chǎn)廠家</p><p style="text-indent:25px">原子吸收分光光度計在分析化學中的應用未能引起重視。工業(yè)原子吸收分光光度計排行</p><p style="text-indent:25px">原子吸收分光光度計安全操作須知：一.操作人員必須經(jīng)過儀器生產(chǎn)商的操作培訓或持有更高級別職業(yè)資格證書；二.儀器室內(nèi)不得使用或存放其他無關(guān)的易燃、易爆等危險品；三.禁止在儀器附近抽煙或使用明火；四.儀器使用前，操作人員應對儀器進行安全檢查并填寫《TAS系列原子吸收分光光度計安全檢查記錄卡》；五.點火前排風裝置必須打開；六.點火時操作人員應處于儀器正面左側(cè)，且右側(cè)及正后方不能站人；七.儀器使用完畢后，先關(guān)閉乙炔鋼瓶總開關(guān)，待火焰自動熄滅后，再關(guān)閉空壓機；八.為了防止乙炔鋼瓶總開關(guān)泄露，所有工作結(jié)束后，應再次確認乙炔各壓力表指針歸零。工業(yè)原子吸收分光光度計排行</p></p><br /><p>文章來源地址: 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