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href="http://www.cdcfah.com/cp/third-fenxiyiqi_ysfxyq/">元素分析儀器</a>?石油原子吸收分光光度計(jì)銷售廠家服務(wù)為先上海儀電分析儀器供應(yīng)</p><div id="c3jxurd" class="leftbox clearfix"><h1>石油原子吸收分光光度計(jì)銷售廠家服務(wù)為先上海儀電分析儀器供應(yīng)</h1><div id="i9noqse" class="proBig"><div id="yprtlxu" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988085019176/8464581.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="fmebd8h" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988085019176/8464581.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="sc7xpby" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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>石油原子吸收分光光度計(jì)銷售廠家,原子吸收分光光度計(jì)</p><p><span>***更新：</span>2021-01-04 07:14:14</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="wlifmyv" 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(hào)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="rbiph84" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="8dpmyah" class="box"><p><p style="text-indent:25px">在原子化進(jìn)程中，用高達(dá)數(shù)百安培電流加熱石墨管，在一秒鐘內(nèi)使之達(dá)到2000℃～3000℃，樣品在如此短的時(shí)刻被加熱蒸騰、解離成分子、原子蒸氣是一個(gè)急速分散脹大改變進(jìn)程。石墨管內(nèi)待測元素原子和共存物質(zhì)蒸氣的濃度具有激烈的時(shí)空特性，即管內(nèi)不同點(diǎn)的濃度隨時(shí)刻而急速改變，同一時(shí)刻不同方位的濃度也不同。用快速響應(yīng)檢測電路系統(tǒng)取得的原子吸收和背景吸收信號(hào)是兩條隨時(shí)刻改變的曲線，這便是原子化信號(hào)的瞬態(tài)性。這一點(diǎn)與火焰法的安穩(wěn)信號(hào)完全不同，石油原子吸收分光光度計(jì)銷售廠家。此外，石油原子吸收分光光度計(jì)銷售廠家，原子化進(jìn)程的瞬態(tài)信號(hào)還受制于石墨管的時(shí)刻和空間溫度特性，石油原子吸收分光光度計(jì)銷售廠家，此乃人們感興趣也是研究很多的問題之一。原子吸收分光光度計(jì)應(yīng)用也有一定的局限性。石油原子吸收分光光度計(jì)銷售廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="石油原子吸收分光光度計(jì)銷售廠家,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988085019176/8464581.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)空心陰方燈的作業(yè)電流挑選：空心陰方燈一般需求預(yù)熱10-30min才干到達(dá)安穩(wěn)輸出。燈電流過小，放電不安穩(wěn)，故光譜輸出不安穩(wěn)，且光譜輸出強(qiáng)度小；燈電流過大，發(fā)射譜線變寬，導(dǎo)致靈敏度下降，校正曲線曲折，燈壽數(shù)縮短。選用燈電流的一般原則是，在保證有滿足強(qiáng)且安穩(wěn)的光強(qiáng)輸出條件下，盡量運(yùn)用較低的作業(yè)電流。通常以空心陰方燈上標(biāo)明的很大電流的一半至三分之二作為作業(yè)電流。在具體的剖析場合，很適宜的作業(yè)電流由實(shí)驗(yàn)確定。石油原子吸收分光光度計(jì)銷售廠家原子吸收分光光度計(jì)，利用空氣—乙炔測定的元素可達(dá)30多種。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="石油原子吸收分光光度計(jì)銷售廠家,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)現(xiàn)已多用于各個(gè)剖析領(lǐng)域，主要有四個(gè)方面:理論研究;元素剖析;有機(jī)物剖析;金屬化學(xué)形狀剖析，理論研究中的使用:原子吸收可作為物理和物理化學(xué)的一種實(shí)驗(yàn)手段，對(duì)物質(zhì)的一些根本性能進(jìn)行測定和研究。電熱原子化器簡單做到控制蒸發(fā)進(jìn)程和原子化進(jìn)程，所以用它測定一些根本參數(shù)有很多長處。用電熱原子化器所測定的一些有元素脫離機(jī)體的活化能、氣態(tài)原子擴(kuò)散系數(shù)、解離能、振子強(qiáng)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(jì)安全使用的前提條件：原子吸收分光光度計(jì)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(shí)，被蒸氣中待測元素的基態(tài)原子所吸收，使通過的光波強(qiáng)度削弱，依據(jù)光波強(qiáng)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(diǎn)。多應(yīng)用于特種氣體，金屬有機(jī)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(duì)檢測工作帶來不便。原子吸收分光光度計(jì)能夠靈敏可靠地測定微量或痕量元素。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="石油原子吸收分光光度計(jì)銷售廠家,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991311337342/3521940.png"></div><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(jì)，因而原子吸收分光光度計(jì)，就有原子吸收分光光度計(jì)和帶石墨爐的原子吸收分光光度計(jì)。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(jì)，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?jì)，一般可檢測到PPm級(jí)（10-6），精密度1%左右。國產(chǎn)的原子吸收分光光度計(jì)，都可配備各種型號(hào)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(jí)（10-9），相對(duì)標(biāo)準(zhǔn)偏差2%左右。汞(Hg)可用冷原子吸收法測定。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(jì)。中國原子吸收分光光度計(jì)經(jīng)銷商</p><p style="text-indent:25px">原子吸收分光光度計(jì)基本結(jié)構(gòu)包括光源，原子化器，光學(xué)系統(tǒng)和檢測系統(tǒng)。石油原子吸收分光光度計(jì)銷售廠家</p><p style="text-indent:25px">原子吸收分光光度計(jì)中常用的定量辦法：規(guī)范曲線法。規(guī)范曲線法是用規(guī)范物質(zhì)制造一系列已知濃度的規(guī)范試樣，在規(guī)范條件下，測得每一濃度對(duì)應(yīng)的吸光度值，以吸光度對(duì)濃度作圖，制作規(guī)范曲線。在相同條件下測定樣品吸光度，從規(guī)范曲線上讀取樣品濃度。長處：適用范圍廣，快速簡便，合適大批量樣品的測定。缺乏：試驗(yàn)準(zhǔn)確度受基體干擾嚴(yán)重。規(guī)范參加法：規(guī)范參加法是在數(shù)個(gè)等分的試樣平分別參加呈比例的規(guī)范試樣，然后稀釋到一定體積。根據(jù)測定的吸光度值，制作吸光度A-c（濃度）曲線。用外推法求得稀釋后試樣中待測物的濃度。石油原子吸收分光光度計(jì)銷售廠家</p><p style="text-indent:25px">上海儀電分析儀器有限公司致力于儀器儀表，是一家生產(chǎn)型公司。公司自成立以來，以質(zhì)量為發(fā)展，讓匠心彌散在每個(gè)細(xì)節(jié)，公司旗下分光光度計(jì)，氣相色譜，原子吸收，食品安全深受客戶的喜愛。公司從事儀器儀表多年，有著創(chuàng)新的設(shè)計(jì)、強(qiáng)大的技術(shù)，還有一批**的專業(yè)化的隊(duì)伍，確保為客戶提供良好的產(chǎn)品及服務(wù)。儀電分析憑借創(chuàng)新的產(chǎn)品、專業(yè)的服務(wù)、眾多的成功案例積累起來的聲譽(yù)和口碑，讓企業(yè)發(fā)展再上新高。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2698422.html</p></div></div></div></div></div><div id="gvifcel" class="page-right twoColRt"><div id="ts7og8p" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="zo7phol" 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