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href="http://www.cdcfah.com/cp/third-fenxiyiqi_ysfxyq/">元素分析儀器</a>?低端原子吸收分光光度計(jì)廠家來電咨詢上海儀電分析儀器供應(yīng)</p><div id="yzopw8g" class="leftbox clearfix"><h1>低端原子吸收分光光度計(jì)廠家來電咨詢上海儀電分析儀器供應(yīng)</h1><div id="amn84pm" class="proBig"><div id="7q4z7bx" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988188495975/1516361.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="sx8s9su" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988188495975/1516361.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ujae3vm" 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>低端原子吸收分光光度計(jì)廠家,原子吸收分光光度計(jì)</p><p><span>***更新：</span>2021-02-07 00:21:53</p><p><span id="click" >瀏覽次數(shù)：6次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="t333yhd" 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="rgi8uqh" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="a29xlcy" class="box"><p><p style="text-indent:25px">石墨爐原子吸收分光光度計(jì)火焰類型：火焰類型和狀態(tài)對靈敏度高低起著重要作用，應(yīng)根據(jù)被測元素特性去選擇不同火焰。目前火焰按類型分有空氣一氫火焰、空氣一乙炔火焰、一氧化氮一乙炔火焰?？諝庖粴浠鹧娴幕鹧鏈囟容^低，用于測定火焰中容易原子化的元素如砷、硒等;空氣一乙炔火焰屬于中溫火焰，用于測定火焰中較難離解的元素如鎂、鈣、銅、鋅、鉛、錳等;一氧化氮一乙炔火焰屬于高溫火焰，用于測定火焰中難于離解的元素如釩、鋁等?；鹧姘礌顟B(tài)分有貧焰、化學(xué)計(jì)量焰、富焰。貧焰是指使用過量氧化劑時(shí)的火焰，由于大量冷的氧化劑帶走火焰中的熱量，這種火焰溫度較低，又由于氧化劑充分，燃燒完全，火焰具有氧化性氣氛，低端原子吸收分光光度計(jì)廠家，所以這種火焰適用于堿金屬元素的測定。化學(xué)計(jì)量焰是按化學(xué)計(jì)量關(guān)系計(jì)算的燃料和氧化劑比率燃燒的火焰，它具有溫度高、干擾少、穩(wěn)定、背景低等特點(diǎn)，除堿金屬和易形成難離解氧化物的元素，大多數(shù)常見元素常用這種火焰。富焰是便用過量燃料的火焰，由于燃燒不完全，火焰具有較強(qiáng)的還原氣氛，低端原子吸收分光光度計(jì)廠家，所以，這種火焰具有還原性，適用于測定較易于形成難熔氧化物的元素如鑰，低端原子吸收分光光度計(jì)廠家、稀土元素等?；鹧嬖踊ㄖ校鹧骖愋秃吞匦允怯绊懺踊实闹饕蛩?。低端原子吸收分光光度計(jì)廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="低端原子吸收分光光度計(jì)廠家,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988188495975/1516361.png"></div><p style="text-indent:25px">火焰原子吸收分光光度計(jì)使用的注意事項(xiàng)：1、應(yīng)放在干燥的房間內(nèi)，使用時(shí)放置在堅(jiān)固平穩(wěn)的工作臺(tái)上，室內(nèi)照明不宜太強(qiáng)。熱天時(shí)不能用電扇直接向儀器吹風(fēng)，防止燈泡燈絲發(fā)亮不穩(wěn)定。2、為了防止光電管疲勞，不測定時(shí)必須將試樣室蓋打開，使光路切斷，以延長光電管的使用壽命。、取拿比色皿時(shí)，手指只能捏住比色皿的毛玻璃面，而不能碰比色皿的光學(xué)表面。4、比色皿不能用堿溶液或氧化性強(qiáng)的洗滌液洗滌，也不能用毛刷清洗。比色皿外壁附著的水或溶液應(yīng)用擦鏡紙或細(xì)而軟的吸水紙吸干，不要擦拭，以免損傷它的光學(xué)表面。5、使用光度計(jì)前，應(yīng)該首先了解本儀器的結(jié)構(gòu)和工作原理，以及各個(gè)操縱旋鈕之功能。在未按通電源之前，原子吸收分光光度計(jì)應(yīng)該對火焰原子吸收分光光度計(jì)的安全性能進(jìn)行檢查，電源接線應(yīng)牢固，通電也要良好，各個(gè)調(diào)節(jié)旋鈕的起始位置應(yīng)該正確，然后再按通電源開關(guān)。6、長期不用時(shí)，需用將儀器使用防護(hù)罩罩住。低端原子吸收分光光度計(jì)廠家原子吸收分光光度計(jì)氧化亞氮—乙炔火焰安全性較差。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="低端原子吸收分光光度計(jì)廠家,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">原子吸收光譜儀所檢測，導(dǎo)致吸光度值偏高：光譜背景除了波長特征之外，還有時(shí)間、空間分布特征。分子吸收通常先于原子吸收信號之前產(chǎn)生，當(dāng)有快速響應(yīng)電路和記錄裝置時(shí)，可以從時(shí)間上分辨分子吸收和原子吸收信號。樣品蒸氣在石墨爐內(nèi)分布的不均勻性，導(dǎo)致了背景吸收空間分布的不均勻性。提高溫度使單位時(shí)間內(nèi)蒸發(fā)出的背景物的濃度增加，同時(shí)也使分子解離增加。這兩個(gè)因素共同制約著背景吸收。在恒溫爐中，提高溫度和升溫速率，使分子吸收明顯下降。</p><p style="text-indent:25px">原子吸收分光光度計(jì)工作原理：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(qiáng)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(qiáng)度；I0為發(fā)射光強(qiáng)度；T為透射比；L為光通過原子化器光程(長度)，每臺(tái)儀器的L值是固定的；C是被測樣品濃度；所以A=KC。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度計(jì)。它有單光束，雙光束，雙波道，多波道等結(jié)構(gòu)形式。其基本結(jié)構(gòu)包括光源，原子化器，光學(xué)系統(tǒng)和檢測系統(tǒng)。它主要用于痕量元素雜質(zhì)的分析，具有靈敏度高及選擇性好兩大主要優(yōu)點(diǎn)。普遍應(yīng)用于各種氣體，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，這對檢測工作帶來不便。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(qiáng)度。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="低端原子吸收分光光度計(jì)廠家,原子吸收分光光度計(jì)" 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(jì)常見的故障解決方法：故障現(xiàn)象：燃燒縫因生銹被腐蝕，致使汽化的樣品不能全部被原子化，降低了靈敏度。產(chǎn)生原因：液體樣品在噴霧器和撞擊球雙重作用下被汽化，結(jié)尾這些汽化的樣品集中流經(jīng)到燃燒縫處被火焰加熱到原子化狀態(tài)參與測試。解決方法：如果火焰燃燒頭的燃燒縫被堵塞，勢必造成靈敏度的下降，解決的辦法就是用稀酸清洗燃燒縫。另一個(gè)有關(guān)燃燒縫的故障是燃燒縫因生銹而被腐蝕，造成縫隙處不光潔，從而影響了靈敏度的下降。在一定范圍內(nèi)增大燈電流可以增大輻射強(qiáng)度，同時(shí)噪音也增大，但是儀器靈敏度降低。環(huán)境檢測原子吸收分光光度計(jì)現(xiàn)貨</p><p style="text-indent:25px">實(shí)驗(yàn)臺(tái)：應(yīng)鞏固穩(wěn)定，臺(tái)面平整。低端原子吸收分光光度計(jì)廠家</p><p style="text-indent:25px">原子吸收分光光度計(jì)的實(shí)際應(yīng)用：1、有機(jī)物分析中的應(yīng)用：利用間接法可以測定多種有機(jī)物。8-羥基喹啉(Cu)、醇類(Cr)、醛類(Ag)、酯類(Fe)、酚類(Fe)、聯(lián)乙酰(Ni)、酞酸(Cu)、脂肪胺(co)、氨基酸(Cu)、維生素C(Ni)、氨茴酸(Co)、雷米封(Cu)、甲酸奎寧(Zn)、有機(jī)酸酐(Fe)、苯甲基青霉素(Cu)、葡萄糖(Ca)、環(huán)氧化物水解酶(PbO、含鹵素的有機(jī)化合物(Ag)等多種有機(jī)物，均通過與相應(yīng)的金屬元素之間的化學(xué)計(jì)量反應(yīng)而間接測定。2、金屬化學(xué)形態(tài)分析中的應(yīng)用：通過氣相色譜和液體色譜分離然后以原子吸收光譜加以測定，可以分析同種金屬元素的不同有機(jī)化合物。例如汽油中5種烷基鉛，大氣中的5種烷基鉛、烷基硒、烷基胂、烷基錫，水體中的烷基胂、烷基鉛、烷基揭、烷基汞、有機(jī)鉻，生物中的烷基鉛、烷基汞、有機(jī)鋅、有機(jī)銅等多種金屬有機(jī)化合物，均可通過不同類型的光譜原子吸收聯(lián)用方式加以鑒別和測定。低端原子吸收分光光度計(jì)廠家</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3195407.html</p></div></div></div></div></div><div id="hgn9ahd" class="page-right twoColRt"><div id="i7kgdk8" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="uovf33g" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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