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當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</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>?國產(chǎn)原子吸收分光光度計怎么樣來電咨詢上海儀電分析儀器供應(yīng)</p><div id="qk4s2ki" class="leftbox clearfix"><h1>國產(chǎn)原子吸收分光光度計怎么樣來電咨詢上海儀電分析儀器供應(yīng)</h1><div id="8iywciw" class="proBig"><div id="usioeci" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991311337342/3521940.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="64iywkq" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991311337342/3521940.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="8wu4kau" 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>國產(chǎn)原子吸收分光光度計怎么樣,原子吸收分光光度計</p><p><span>***更新：</span>2021-01-31 03:12:44</p><p><span id="click" >瀏覽次數(shù)：3次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="omkaq44" 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(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="cy4y0em" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="ko4gmyo" class="box"><p><p style="text-indent:25px">石墨爐原子化器相對于火焰原子化器具有體積小、檢出限低用樣量少等特點；石墨爐原子化的缺點主要是基體蒸發(fā)時可能造成較大的分子吸收，爐管本身的氧化也產(chǎn)生分子吸收，背景吸收較大，一些固體微粒引起光散射造成假吸收，因此使用石墨爐原子化器必須使用背景校正裝置校正。石墨爐原子化器主要包括爐體、電源、冷卻水、氣路系統(tǒng)等，目前商品儀器的爐體又分為縱向加熱和橫向加熱?？v向加熱石墨爐（國產(chǎn)儀器的石墨爐體多為縱向加熱）由于要在石墨管兩端的電極上進行水冷，造成沿光路方向上存在溫度梯度，使整個石墨管內(nèi)具有不等溫性導(dǎo)致基體干擾嚴(yán)重，影響原子化過程。針對上述問題，商品儀器經(jīng)過多次的改進，又發(fā)展了平臺原子化（在改善縱向石墨爐加熱方面有比較大的貢獻），國產(chǎn)原子吸收分光光度計怎么樣、探針原子化、電容放電強脈沖加熱石墨爐，這些技術(shù)都在一定程度上或多或少地彌補了縱向加熱的缺點，但還是沒有解決根本問題。而橫向加熱石墨爐技術(shù)恰恰能解決縱向的不等溫性的缺點，它較大增加了管內(nèi)恒溫區(qū)域，降低原子化溫度和時間，國產(chǎn)原子吸收分光光度計怎么樣，使得原子濃度均勻且穩(wěn)定性好，明顯地降低基體效應(yīng)和消除記憶效應(yīng)，同時還可降低對爐體的要求，國產(chǎn)原子吸收分光光度計怎么樣，增加了石墨管的使用壽命。原子吸收分光光度計主要用于痕量元素雜質(zhì)的分析。國產(chǎn)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="國產(chǎn)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">光源的作用是發(fā)射出能被待測元素吸收的特征波長譜線，供測量用。為了保證峰值吸收的測量，要求光源必須能發(fā)射出比吸收線寬度更窄的銳線光譜，并且強度大而穩(wěn)定，背景低且噪聲小，使用壽命長?？招年帢O燈（hollowcathodelamp，HCL）、無極放電燈、蒸氣放電燈和激光光源燈都能滿足上述要求，其中應(yīng)用較普遍的是空心陰極燈和無極放電燈。量寶空心陰極燈又稱元素?zé)?，根?jù)陰極材料的不同，分為單元素?zé)艉投嘣責(zé)敉ǔ?，單元素的空心陰極燈只能用于一種元素的測定，這類燈發(fā)射線干擾少，強度高，但每測一種元素需要更換一種燈。多元素?zé)艨蛇B續(xù)測定幾種元素，減少了換燈的麻煩，但光強度較弱，容易產(chǎn)生干擾。目前，中國生產(chǎn)的空心陰極燈可以滿足國內(nèi)外各種型號的原子吸收分光光度計的要求，元素品種達60余種。全自動原子吸收分光光度計賣價很長一段時間，原子吸收主要局限于天體物理方面的研究。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國產(chǎn)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/ydfx123/637419988105282341/1372565.png"></div><p style="text-indent:25px">如何才能正確選擇原子吸收分光光度計？1、原子吸收分光光度計空心陰極燈的工作電流?？招年帢O燈一般需要預(yù)熱10-30min才能達到穩(wěn)定輸出。燈電流過小，放電不穩(wěn)定，故光譜輸出不穩(wěn)定，且光譜輸出強度小;燈電流過大，發(fā)射譜線變寬，導(dǎo)致靈敏度下降，校正曲線彎曲，燈壽命縮短。選用燈電流的一般原則是，在保證有足夠強且穩(wěn)定的光強輸出條件下，盡量使用較低的工作電流。通常以空心陰極燈上標(biāo)明的Z大電流的一半至三分之二作為工作電流。在具體的分析場合，較適宜的工作電流由實驗確定。2、原子吸收分光光度計進樣量。進樣量過小，吸收信號弱，不便于測量;進樣量過大，在火焰原子化法中，對火焰產(chǎn)生冷卻效應(yīng)，在石墨爐原子化法中，會增加除殘的困難。在實際工作中，應(yīng)測定吸光度隨進樣量的變化，達到滿意的吸光度的進樣量，即為應(yīng)選擇的進樣量。</p><p style="text-indent:25px">原子吸收分光光度計按光束形成可分為單光束（指從光源中發(fā)出的光只以單一光束的形式通過原子化器、單色器和檢測系統(tǒng)）和雙光束（指從光源發(fā)出的光被切光器分成兩束強度相等的光，一束為樣品光束通過原子化器被基態(tài)原子部分吸收；另一束只作為參比光束，不通過原子化器，其光強度不被減弱）兩類；按包含“單獨”的分光系統(tǒng)和檢測系統(tǒng)的數(shù)目又可分為單道（指儀器只有一個光源，一個單色器，一個顯示系統(tǒng)，每次只能測一種元素）、雙道（指儀器有兩個不同光源，兩個單色器兩個檢測顯示系統(tǒng)）和多道。目前普遍使用的是單道單光束或單道雙光束原子吸收分光光度計。原子吸收分光光度計型號繁多，不同型號儀器性能和應(yīng)用范圍不同。原子吸收分光光度計安全操作須知：建議將氣瓶安裝在不受陽光直接照射的室外。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國產(chǎn)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/ydfx123/637419988188495975/1516361.png"></div><p style="text-indent:25px">火焰原子吸收光譜儀使用光源大都是空心陰極燈，空心陰極燈的燈電流大小決定著燈輻射強度。在一定范圍內(nèi)增大燈電流可以增大輻射強度，同時噪音也增大，但是儀器靈敏度降低。如果燈電流過大，會導(dǎo)致燈本身發(fā)生自蝕現(xiàn)象而縮短燈使用壽命;會放電不正常。相反，在一定范圍內(nèi)降低燈電流可以降低輻射強度，儀器靈敏度提高，但燈穩(wěn)定性和信噪比下降。因此，在具體檢測工作中，如被測樣濃度高時，則使用較大燈電流，以獲得較好穩(wěn)定性;如被測樣濃度低時，則在保證穩(wěn)定性滿足要求的前提下，使用較低的燈電流，以獲得較好的靈敏度。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。全自動原子吸收分光光度計賣價</p><p style="text-indent:25px">原子吸收分光光度計實際效果理想的元素*30余個。國產(chǎn)原子吸收分光光度計怎么樣</p><p style="text-indent:25px">調(diào)整熄滅器位置的目的在于使其縫口平行于外光路的光軸并位于正下方,以保證空心陰極燈的光束完整經(jīng)過火焰并集聚于火焰中心而取得較高的靈活度。熄滅器的調(diào)整是在靜態(tài)下停止的。常以銅燈(324.1nm)作光源,按前述調(diào)整好燈的位置,調(diào)理負(fù)高壓,使透射比為1：100％，然后用儀器附帶的透光檢驗工具或一根火柴棒插入熄滅器縫口里。當(dāng)對光棒直立在熄滅器縫口的正中心時,透射比應(yīng)接近0%,否則仍需對熄滅器位置作前后調(diào)整，然后拍對光棒垂直置于縫口兩端,其透射比應(yīng)降至30%,否則應(yīng)改動熄滅器轉(zhuǎn)角直至到達請求為止。當(dāng)靜態(tài)調(diào)整終了之后,若有必要,可在點火的狀況下,吸噴銅規(guī)范溶液,調(diào)整熄滅器的前后轉(zhuǎn)角及其高度，丈量不同位置時的吸光度。對應(yīng)予大吸光度的位置為位置,但熄滅器不應(yīng)擋光。由于不同元素的熄滅器高度是不同的，運用時應(yīng)依據(jù)不同的元素重新調(diào)理熄滅器高度。國產(chǎn)原子吸收分光光度計怎么樣</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3087702.html</p></div></div></div></div></div><div id="4eeu2wm" class="page-right twoColRt"><div id="6g2ekg2" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="gkaioci" 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" 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