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class="leftbox clearfix"><h1>國產(chǎn)**原子吸收分光光度計排名真誠推薦上海儀電分析儀器供應(yīng)</h1><div id="zwhnevh" class="proBig"><div id="sgxjkqr" 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="rkqr38p" 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="2qtul7k" 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排名,原子吸收分光光度計</p><p><span>***更新：</span>2021-01-21 10:14:43</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="wz8mbso" 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="2fm239s" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="pcdukr2" class="box"><p><p style="text-indent:25px">你知道怎樣正確挑選原子吸收分光光度計嗎？1.剖析線挑選：通常選用共振吸收線為剖析線，測定高含量元素時，能夠選用靈敏度較低的非共振吸收線為剖析線。As、Se等共振吸收線位于200nm以下的遠(yuǎn)紫外區(qū)，火焰組分對其有明顯吸收，故用火焰原子吸收法測定這些元素時，不宜選用共振吸收線為剖析線。2.狹縫寬度挑選：狹縫寬度影響光譜通帶寬度與檢測器接受的能量，國產(chǎn)**原子吸收分光光度計排名。原子吸收分光光度計中，國產(chǎn)**原子吸收分光光度計排名，光譜堆疊干擾的幾率小，能夠答應(yīng)運用較寬的狹縫。調(diào)節(jié)不同的狹縫寬度，測定吸光度隨狹縫寬度而變化，當(dāng)有其它的譜線或非吸收光進(jìn)入光譜通帶內(nèi)，吸光度將當(dāng)即減小，國產(chǎn)**原子吸收分光光度計排名。不引起吸光度減小的很大狹縫寬度，即為應(yīng)選取的合適的狹縫寬度。原子吸收分光光度計，利用空氣—乙炔測定的元素可達(dá)30多種。國產(chǎn)**原子吸收分光光度計排名</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排名,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">原子吸收分光光度計職業(yè)開展現(xiàn)狀剖析：通過一代科學(xué)技能工作者的努力，現(xiàn)在，我國已經(jīng)成功地掌握了原子吸收光譜儀的設(shè)計、生產(chǎn)技能。在火焰剖析方面，與國外同類型儀器比較，國產(chǎn)儀器的典型元素檢出達(dá)到相同水平，甚至超過國外。但由于我國在新產(chǎn)品研討開發(fā)方面投入缺乏，使國產(chǎn)儀器在自動化程度和長時間工作可靠性方面還有不少距離，尤其是石墨爐剖析技能不同更大。為了改變這一落后面貌，北京、上海等地的企業(yè)及研討所著重投入資金用于無火焰石墨爐技能的研討開發(fā)，在剖析重復(fù)性與元素檢出限等方面取得不少發(fā)展，并有新產(chǎn)品推出。水質(zhì)原子吸收分光光度計比較原子吸收分光光度計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="國產(chǎn)**原子吸收分光光度計排名,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">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，進(jìn)樣量少，靈敏度高，有的元素也可以分析到pg/mL級。元素在熱解石墨爐中被加熱原子化，成為基態(tài)原子蒸汽，對空心陰極燈發(fā)射的特征輻射進(jìn)行選擇性吸收。在一定濃度范圍內(nèi)，其吸收強度與試液中被測元素的含量成正比。其定量關(guān)系可用郎伯-比耳定律，A=-lgI/Io=-lgT=KCL，式中I為透射光強度；I0為發(fā)射光強度；T為透射比；L為光通過原子化器光程(長度)，每臺儀器的L值是固定的；C是被測樣品濃度；所以A=KC。</p><p style="text-indent:25px">電熱原子化器普遍應(yīng)用的是原子吸收分光光度計，因而原子吸收分光光度計，就有原子吸收分光光度計和帶石墨爐的原子吸收分光光度計。前者原子化的溫度在2100℃～2400℃之間，后者在2900℃～3000℃之間。原子吸收分光光度計，利用空氣—乙炔測定的元素可達(dá)30多種，若使用氧化亞氮—乙炔火焰，測定的元素可達(dá)70多種。但氧化亞氮—乙炔火焰安全性較差，應(yīng)用不普遍?？諝狻胰不鹧嬖游辗止夤舛扔嫞话憧蓹z測到PPm級（10-6），精密度1%左右。國產(chǎn)的原子吸收分光光度計，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(biāo)準(zhǔn)偏差2%左右。汞(Hg)可用冷原子吸收法測定?；鹧嬗卸喾N火焰，目前普遍應(yīng)用的是空氣—乙炔火焰。</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排名,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991252020619/9480950.png"></div><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?，F(xiàn)在我國已有多家企業(yè)生產(chǎn)多種型號、性能較先進(jìn)的原子吸收分光光度計。中國原子吸收分光光度計廠家供應(yīng)</p><p style="text-indent:25px">原子吸收光譜分析工作原理：利用待測元素的共振輻射。國產(chǎn)**原子吸收分光光度計排名</p><p style="text-indent:25px">原子吸收光譜分析，由于其靈敏度高、干擾少、分析方法簡單快速，現(xiàn)已多地應(yīng)用于工業(yè)、農(nóng)業(yè)、生化、地質(zhì)、冶金、食品、環(huán)保等各個領(lǐng)域，目前原子吸收已成為金屬元素分析的強有力工具之一，而且在許多領(lǐng)域已作為標(biāo)準(zhǔn)分析方法。原子吸收光譜分析的特點決定了它在地質(zhì)和冶金分析中的重要地位，它不*取代了許多一般的濕法化學(xué)分析，而且還與X-射線熒光分析，甚至與中子活化分析有著同等的地位。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(dá)到足夠的靈敏度和很好的精密度。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。國產(chǎn)**原子吸收分光光度計排名</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2946183.html</p></div></div></div></div></div><div id="mi7rdeq" 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