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#f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>專業(yè)原子吸收分光光度計(jì)排行,原子吸收分光光度計(jì)</p><p><span>***更新：</span>2021-02-02 06:11:25</p><p><span id="click" >瀏覽次數(shù)：5次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="9hvtftp" 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="f9vl7jr" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="j7bzfrp" class="box"><p><p style="text-indent:25px">原子吸收分光光度計(jì)原子化條件：(1)火焰類型和特性:在火焰原子化法中，火焰類型和特性是影響原子化效率的主要因素。對(duì)低、中溫元素，使用空氣-乙炔火焰;對(duì)高溫元素，宜采用氧化亞氮-乙炔高溫火焰;對(duì)分析線位于短波區(qū)(200nm以下)的元素，使用空氣-氫火焰是合適的。對(duì)于確定類型的火焰，稍富燃的火焰(燃?xì)饬看笥诨瘜W(xué)計(jì)量)是有利的。對(duì)氧化物不十分穩(wěn)定的元素如Cu，專業(yè)原子吸收分光光度計(jì)排行、Mg、Fe、Co、Ni等，專業(yè)原子吸收分光光度計(jì)排行，用化學(xué)計(jì)量火焰(燃?xì)馀c助燃?xì)獾谋壤c它們之間化學(xué)反應(yīng)計(jì)量量相近)或貧燃火焰(燃?xì)饬啃∮诨瘜W(xué)計(jì)量)也是可以的。為了獲得所需特性的火焰，需要調(diào)節(jié)燃?xì)馀c助燃?xì)獾谋壤?2)燃燒器的高度選擇:在火焰區(qū)內(nèi)，自由原子的空間分布是不均勻，且隨火焰條件而改變，因此，應(yīng)調(diào)節(jié)燃燒器的高度，以使來自空心陰極燈的光束從自由原子濃度較大的火焰區(qū)域通過，專業(yè)原子吸收分光光度計(jì)排行，以期獲得高的靈敏度。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)的一些基本性能進(jìn)行測(cè)定和研究。專業(yè)原子吸收分光光度計(jì)排行</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="專業(yè)原子吸收分光光度計(jì)排行,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">電熱原子化器電熱原子化器的種類有多種，如電熱高溫管式石墨爐原子化器、石墨杯原子化器、鉭舟原子化器、碳棒原子化器、鎳杯原子化器、高頻感應(yīng)爐和等離子噴焰等。在商品儀器中常用的電熱原子化器是管式石墨爐原子化器。石墨爐是用石墨管做成，將樣品用進(jìn)樣器定量注入石墨管中，并以石墨管作為電阻發(fā)熱體，通電后迅速升溫，使試樣達(dá)到原子化目的。它由加熱電源、保護(hù)氣控制系統(tǒng)和石墨管狀爐組成。外電源加于石墨管兩端供給原子化器能量，電流通過石墨管產(chǎn)生3000℃的高溫，使置于石墨管中的被測(cè)元素變?yōu)榛鶓B(tài)原子蒸氣。保護(hù)氣系統(tǒng)是控制保護(hù)氣的。外氣路中的Ar氣沿石墨管外壁流動(dòng)，以保護(hù)石墨管不被燒蝕；內(nèi)氣路中的Ar從管兩端流向管中心由管中心孔流出以有效地除去在干燥和灰化過程中產(chǎn)生的基體成分，同時(shí)保護(hù)已經(jīng)原子化了的原子不再被氧化。建材原子吸收分光光度計(jì)儀器原子吸收分光光度計(jì)分析速度較快，操作簡(jiǎn)便，半個(gè)小時(shí)內(nèi)能連續(xù)測(cè)定幾十個(gè)試樣中的5、6種元素。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="專業(yè)原子吸收分光光度計(jì)排行,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">原子吸收分光光度計(jì)的基本部件：原子吸收分光光度計(jì)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(cè)裝置）。原子化器主要有兩大類，即火焰原子化器和電熱原子化器?；鹧嬗卸喾N火焰，目前普遍應(yīng)用的是空氣—乙炔火焰。電熱原子化器普遍應(yīng)用的是石墨爐原子化器，因而原子吸收分光光度計(jì)，就有火焰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。</p><p style="text-indent:25px">原子吸收分光光度計(jì)把有單光束和雙度光束兩種類型如果將原子化質(zhì)器當(dāng)作分光光度計(jì)的比色皿，其儀器的構(gòu)造到與分光光度計(jì)比較相似。與分光光度計(jì)相比，不同點(diǎn)：(1)采用銳線光源；(2)單色器在火焰與檢測(cè)器之間。如果像分光光度計(jì)那樣，把單色器置于原子化器之前，火焰本身所發(fā)射的連續(xù)光譜就會(huì)直接照射在PMT上，會(huì)導(dǎo)致PMT壽命縮短，甚至不能正常工作。(3)原子化系統(tǒng)：除了光源發(fā)射的光外，還存在：a.火焰本身所發(fā)射的連續(xù)光譜；b.原子吸收中的原子發(fā)射現(xiàn)象。在原子化過程中，基態(tài)原子受到輻射躍遷到激發(fā)態(tài)后，處于不穩(wěn)定狀態(tài)，返回基態(tài)時(shí)，可能將能量又以光的形式釋放出來。故既存在原子吸收，也有原子發(fā)射。產(chǎn)生的輻射也不一定在一個(gè)方向上，但對(duì)測(cè)量仍將產(chǎn)生一定干擾?；鹧嬖游辗止夤舛扔?jì)對(duì)大多數(shù)元素有較高靈敏度。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="專業(yè)原子吸收分光光度計(jì)排行,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991236161257/4858141.png"></div><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(duì)靈敏度高低起著重要作用，應(yīng)根據(jù)被測(cè)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(cè)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(cè)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(cè)定火焰中難于離解的元素如釩、鋁等。火焰按狀態(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，所以這種火焰適用于堿金屬元素的測(cè)定?；瘜W(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，所以，這種火焰具有還原性，適用于測(cè)定較易于形成難熔氧化物的元素如鑰、稀土元素等。原子吸收分光度計(jì)分析樣品優(yōu)點(diǎn)：準(zhǔn)確度好。建材原子吸收分光光度計(jì)儀器</p><p style="text-indent:25px">原子吸收分光光度計(jì)國(guó)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。專業(yè)原子吸收分光光度計(jì)排行</p><p style="text-indent:25px">原子吸收分光光度計(jì)作用：原子吸收分光光度計(jì)的作用是進(jìn)樣器把溶液中的金屬離子提升到原子化器，用原子化器（石墨爐原子化器或者火焰原子化器）把液體通過高溫的方式轉(zhuǎn)化為氣態(tài)原子蒸汽，由于元素不同，導(dǎo)致特征譜線不同，不同的原子會(huì)吸收其特征波長(zhǎng)的光子。這時(shí)候從光源（空心陰極燈）發(fā)出來的特征譜線通過原子蒸汽被吸收一部分，比較原始光強(qiáng)（I0）和吸收后的光強(qiáng)(I)，用比爾定律得出吸收比率，進(jìn)而用標(biāo)準(zhǔn)曲線法或者標(biāo)準(zhǔn)加入法計(jì)算濃度。專業(yè)原子吸收分光光度計(jì)排行</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3122576.html</p></div></div></div></div></div><div id="nltzv7f" class="page-right twoColRt"><div id="rpn9drl" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="7r9vlzf" 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" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="z7pntp9" 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