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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="wlnkmoa" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988163192494/7997740.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ysu323m" 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>直讀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>2021-01-23 00:21:22</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="tdkhovs" 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="chegikb" class="page-proshow02"><p class="title">詳細說明</p><div id="nxzr2ei" class="box"><p><p style="text-indent:25px">原子吸收分光光度計每次燃燒前檢查廢液管是否打好水封；確認水封無誤時方可開機燃燒。乙炔鋼瓶放置在接近儀器室的房間內(nèi)，直讀原子吸收分光光度計選擇，保持空氣流通，并應(yīng)有防火標識。必定要運用的乙炔**減壓閥，并裝有防回火設(shè)備。乙炔減壓閥的出口壓力為0，直讀原子吸收分光光度計選擇.07MPa，不能大于0.1MPa，空氣出口壓力在0.25-0，直讀原子吸收分光光度計選擇.3MPa。鋼瓶壓力顯示低于0.3MPa時要更換新瓶。乙炔氣源鄰近禁止明火或過熱高溫物體寄存，乙炔氣源不應(yīng)與氧化性氣源同放。排放的廢液應(yīng)及時傾倒處理或與當?shù)丨h(huán)保部門。禁止帶電插拔數(shù)據(jù)線纜。原子吸收分光光度計氧化亞氮—乙炔火焰安全性較差。直讀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="直讀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">原子吸收分光光度計的兩大特色：1.選擇性強。因為原子吸收分光光度計譜線*發(fā)生在主線系，并且譜線很窄，線重疊幾率較發(fā)射光譜要小得多，所以光譜攪擾較小選擇性強，并且光譜攪擾簡單戰(zhàn)勝。在大多數(shù)情況下，共存元素不對原子吸收分光光度計剖析發(fā)生攪擾。因為選擇性強，使得剖析精細快速。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。原子吸收分光光度計剖析中，首要要使待測元素呈原子狀態(tài)，而原子化往往是將溶液噴霧到火焰中去實現(xiàn)，這就存在理化方面的攪擾，使對難溶元素的測定靈敏度還不夠抱負，因此實際效果抱負的元素*30余個；因為儀器運用中，需用乙炔、氫氣、氬氣、氧化亞氮等，操作中需要注意?？煽吭游辗止夤舛扔嬙趺礃釉游辗止夤舛扔嫺鶕?jù)物質(zhì)基態(tài)原子蒸汽對特征輻射吸收的作用來進行金屬元素分析。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="直讀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/ydfx123/637419991311337342/3521940.png"></div><p style="text-indent:25px">原子吸收分光光度計的優(yōu)點是：原子化效率高，在可調(diào)的高溫下試樣利用率達100%，靈敏度高，試樣用量少，適用于難熔元素的測定。缺點是：試樣組成不均勻性的影響較大，測定精密度較低，共存化合物的干擾比火焰原子化法大，干擾背景比較嚴重，一般都需要校正背景。原子吸收光譜分析現(xiàn)已多用于各個分析領(lǐng)域，主要有四個方面：理論研究；元素分析；有機物分析；金屬化學(xué)形態(tài)分析。理論研究中的應(yīng)用：原子吸收可作為物理和物理化學(xué)的一種實驗手段，對物質(zhì)的一些基本性能進行測定和研究。電熱原子化器容易做到控制蒸發(fā)過程和原子化過程，所以用它測定一些基本參數(shù)有很多優(yōu)點。用電熱原子化器所測定的一些有元素離開機體的活化能、氣態(tài)原子擴散系數(shù)、解離能、振子強度、光譜線輪廓的變寬、溶解度、蒸氣壓等。</p><p style="text-indent:25px">原子吸收分光光度計安全使用的前提條件：原子吸收分光光度計是基于從光源中輻射出的待測元素的特征光波通過樣品的原子蒸氣時，被蒸氣中待測元素的基態(tài)原子所吸收，使通過的光波強度削弱，依據(jù)光波強度削弱的程度，可以求出樣品中待測元素的含量。利用待測元素的共振輻射，通過其原子蒸汽，測定其吸光度的裝置稱為原子吸收分光光光源，原子化器，光學(xué)系統(tǒng)和檢測系統(tǒng)。它主要用于痕量元素雜質(zhì)的分析，具有靈敏度高、精確度好和選擇性好三大主要優(yōu)點。多應(yīng)用于特種氣體，金屬有機化合物，金屬醇鹽中微量元素的分析。但是測定每種元素均需要相應(yīng)的空心陰極燈，這對檢測工作帶來不便。原子吸收分析中，首先要使待測元素呈原子狀態(tài)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="直讀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/ydfx123/637419988150712025/4463747.png"></div><p style="text-indent:25px">原子吸收分光光度計采用新的電子技術(shù)，使儀器顯示數(shù)字化、進樣自動化，計算機數(shù)據(jù)處理系統(tǒng)使整個分析實現(xiàn)自動化。我國在1963年開始對原子吸收分光光度計有一般性介紹。1965年復(fù)旦大學(xué)電光源實驗室和冶金工業(yè)部有色金屬研究所分別研制成功空心陰極燈光源。1970年北京科學(xué)儀器廠試制成WFD-Y1型單光束原子吸收分光光度計?，F(xiàn)在我國已有多家企業(yè)生產(chǎn)多種型號、性能較先進的原子吸收分光光度計。原子吸收分光光度計應(yīng)用也有一定的局限性，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。元素在熱解石墨爐中被加熱原子化，成為基態(tài)原子蒸汽。直讀原子吸收分光光度計選擇</p><p style="text-indent:25px">很長一段時間，原子吸收主要局限于天體物理方面的研究。直讀原子吸收分光光度計選擇</p><p style="text-indent:25px">原子吸收分析中，首先要使待測元素呈原子狀態(tài)，而原子化往往是將溶液噴霧到火焰中去實現(xiàn)，這就存在理化方面的干擾，使對難溶元素的測定靈敏度還不夠理想，因此實際效果理想的元素*30余個；由于儀器使用中，需用乙炔、氫氣、氬氣、氧化亞氮（俗稱笑氣）等，操作中必須注意安全。原子吸收分光光度計一般由四大部分組成，即光源（單色銳線輻射源）、試樣原子化器、單色儀和數(shù)據(jù)處理系統(tǒng)（包括光電轉(zhuǎn)換器及相應(yīng)的檢測裝置）。原子化器主要有兩大類，即原子吸收分光光度計和電熱原子化器?；鹧嬗卸喾N火焰，目前普遍應(yīng)用的是空氣—乙炔火焰。直讀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/2963600.html</p></div></div></div></div></div><div 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