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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>專業(yè)原子吸收分光光度計(jì)代理,原子吸收分光光度計(jì)</p><p><span>***更新：</span>2021-02-06 02:11:36</p><p><span id="click" >瀏覽次數(shù)：4次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="wfxj3pm" 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="p3crjq2" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="8vpxzl3" 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）把液體通過高溫的方式轉(zhuǎn)化為氣態(tài)原子蒸汽，專業(yè)原子吸收分光光度計(jì)代理，由于元素不同，導(dǎo)致特征譜線不同，專業(yè)原子吸收分光光度計(jì)代理，不同的原子會吸收其特征波長的光子。這時候從光源（空心陰極燈）發(fā)出來的特征譜線通過原子蒸汽被吸收一部分，比較原始光強(qiáng)（I0）和吸收后的光強(qiáng)(I)，專業(yè)原子吸收分光光度計(jì)代理，用比爾定律得出吸收比率，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。通常選用共振吸收線為分析線，測定高含量元素時，可以選用靈敏度較低的非共振吸收線為分析線。專業(yè)原子吸收分光光度計(jì)代理</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="專業(yè)原子吸收分光光度計(jì)代理,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)與紫外可見分光光度計(jì)的區(qū)別：1、標(biāo)準(zhǔn)溶液:原子吸收分光光度計(jì)使用的標(biāo)準(zhǔn)溶液在4℃溫度下可保存較長時間，放置室溫后可正常使用。紫外可見分光光度計(jì)樣品及標(biāo)準(zhǔn)溶液顯色穩(wěn)定后需在半小時之內(nèi)測定，且對溫度及時間要求比較苛刻。2、檢測時間:原子吸收分光光度計(jì)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。紫外可見分光光度計(jì)由于有顯色過程，測量時間相對而言較長，操作比較麻煩。3、應(yīng)用對象：原子吸收分光光度計(jì)針對于金屬微量元素的定量分析，火焰法：液樣含量范圍通常在0。1PPM~15PPM之間（個別元素如錫會高些）；石墨爐分析在火焰法的基礎(chǔ)上則能提高2~3個數(shù)級，即液樣含量范圍通常在0。001PPM~0。100PPM之間。紫外可見分光光度計(jì)分析含量范圍一般在1PPM以上，主要分析高含量的樣品。4、操作性：原子吸收分光光度計(jì)操作簡單,對化驗(yàn)員要求比較低，干擾低。紫外可見分光光度計(jì)樣品處理極為復(fù)雜,對化驗(yàn)員要求比較高。全自動原子吸收分光光度計(jì)排名原子吸收分光光度計(jì)是屬于原子光譜。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="專業(yè)原子吸收分光光度計(jì)代理,原子吸收分光光度計(jì)" 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(jì)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?xì)饬看笥诨瘜W(xué)計(jì)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(xué)計(jì)量火焰(燃?xì)馀c助燃?xì)獾谋壤c它們之間化學(xué)反應(yīng)計(jì)量量相近)或貧燃火焰(燃?xì)饬啃∮诨瘜W(xué)計(jì)量)也是可以的。為了獲得所需特性的火焰，需要調(diào)節(jié)燃?xì)馀c助燃?xì)獾谋壤?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(yīng)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。</p><p style="text-indent:25px">原子吸收分光光度法常使用哪些定量分析方法?規(guī)范曲線法：先配制相同基體的含有不同濃度待測元素的系列規(guī)范溶液，在選定的實(shí)驗(yàn)條件下分別測其吸光度.以扣除空白值之后的吸光度為縱坐標(biāo)，規(guī)范溶液濃度為橫坐標(biāo)繪制規(guī)范曲線。在同樣操作條件下測定試樣溶液的吸光度，從規(guī)范曲線查得試樣溶液的濃度。運(yùn)用該辦法時應(yīng)留意：配制的規(guī)范溶液濃度應(yīng)在吸光度與濃度成線性的范圍內(nèi)；整個剖析過程中操作條件應(yīng)堅(jiān)持不變。另外，規(guī)范曲線法固然簡單，但必需保證規(guī)范樣品與試樣的物理性質(zhì)相同，保證不存在干擾物，關(guān)于組成尚不分明的樣品不能用規(guī)范曲線法。原子吸收分光光度計(jì)即每種待測元素都要有一個能發(fā)射特定波長譜線的光源。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="專業(yè)原子吸收分光光度計(jì)代理,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991326259040/7441452.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)常見的故障解決方法：1、故障現(xiàn)象：燃燒器底座不光潔，造成汽化的樣品被阻擋，影響靈敏度。產(chǎn)生原因：一般燃燒器均是由上蓋部分（燃燒縫也在此處）和底座結(jié)合而成，但是，當(dāng)?shù)鬃暗鬃鼙诒桓g后同樣會生銹，從而造成汽化樣品因受阻而流通不暢，使測試靈敏度降低。排除方法：與清潔燃燒縫的方法一樣，用1000目水砂紙打磨底座和底座管壁。2、故障現(xiàn)象：冷卻循環(huán)水溫度過低，致使燃燒縫結(jié)露造成不易點(diǎn)火或火焰分叉故障。產(chǎn)生原因：當(dāng)冷卻循環(huán)水的溫度遠(yuǎn)遠(yuǎn)低于室內(nèi)溫度時，燃燒器的溫度同樣低于室內(nèi)溫度，于是，當(dāng)被汽化的樣品經(jīng)過燃燒縫時，比較多樣品因受急速降溫所形成的水珠被潴留在縫原子吸收分光光度計(jì)定量關(guān)系可用郎伯-比耳定律。元素原子吸收分光光度計(jì)經(jīng)銷商</p><p style="text-indent:25px">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。專業(yè)原子吸收分光光度計(jì)代理</p><p style="text-indent:25px">原子吸收分光光度計(jì)與紫外可見分光光度計(jì)的區(qū)別：1、原理：原子吸收觀察的是構(gòu)成物質(zhì)的元素（原子）中的電子在原子軌道中的躍遷，屬于原子吸收。紫外可見光吸收觀察的是構(gòu)成物質(zhì)的分子中的電子在分子軌道中的躍遷，屬于分子吸收。2、能量:兩者有所同，又有所不同。定量分析的原則同，而測量所需的光能量不同：原子吸收為X射線，能量大，可激發(fā)電子從低的原子軌道向高的原子軌道躍遷。紫外可見吸收為紫外光及可見光，能量小，只能激發(fā)電子從分子軌道向較低（或次低）的空的分子軌道躍遷。通俗的說，原子吸收分光光度計(jì)是用較高的溫度來燃燒分子，使之原子化（變?yōu)榛鶓B(tài)原子），再通過特征輻射，把基態(tài)原子激發(fā)，并吸收能量，通過這個能量差（透過率）來計(jì)算出濃度。而紫外—可見分光光度計(jì)是通過顯色劑（一種能和我們被測元素產(chǎn)生絡(luò)合反應(yīng)的分子），與我們的被測元素產(chǎn)生反應(yīng)，并且反應(yīng)物分子帶有特定的顏色，經(jīng)過分子吸收氘燈（紫外區(qū)）或鎢燈（可見區(qū)）的照射，吸收燈發(fā)射的能量，通過能量差（透過率）來計(jì)算出濃度。專業(yè)原子吸收分光光度計(jì)代理</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3183118.html</p></div></div></div></div></div><div id="xij2ykh" class="page-right twoColRt"><div id="v378kc7" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="vgd8tqn" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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