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style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>原子吸收分光光度計對比,原子吸收分光光度計</p><p><span>***更新：</span>2021-01-27 17:26:16</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="vzflhth" 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="77rvnb9" class="page-proshow02"><p class="title">詳細說明</p><div id="x7lldzv" class="box"><p><p style="text-indent:25px">原子吸收分光光度計首要用于金屬元素的測定，已多應用于礦藏、金屬、陶瓷、水泥、化工產(chǎn)品、土壤、食物、血液、生物體，原子吸收分光光度計對比、環(huán)境污染物等試樣中的金屬元素的測定中。用樣量少?；鹧嬖游展庾V測定的進樣量為3~6mL·min-1，選用微量進樣時可少至10~50μL。石墨爐原子吸收光譜測定的液體進樣為10~20μL，固體進樣量為毫克量級，需要的樣品量很少。儀器設備相對比較簡單，操作簡潔，易于把握。光纖技術(shù)：光纖的應用可使光路曲折，從而使儀器結(jié)構(gòu)愈加緊湊，原子吸收分光光度計對比，體積更小。它是一臺火焰石墨爐一體化AAS儀器，選用倉庫式設計，火焰在上面，將石墨爐放在下面，原子吸收分光光度計對比，因而在切換時沒有任何機械部件的移動，使儀器的穩(wěn)定性更好。原子吸收光譜儀分析中的干擾效應：化學干擾。原子吸收分光光度計對比</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="原子吸收分光光度計對比,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、化學計量焰、富焰。貧焰是指使用過量氧化劑時的火焰，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定。化學計量焰是按化學計量關(guān)系計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，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，火焰具有較強的還原氣氛，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、稀土元素等。工業(yè)原子吸收分光光度計排名石墨爐原子吸收分光光度計，可以測定近50種元素。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="原子吸收分光光度計對比,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991326259040/7441452.png"></div><p style="text-indent:25px">原子吸收分光光度計能檢測哪些元素：1、堿金屬檢測：堿金屬（Li，Na，K，Rb，Cs）是用原子吸收分光光度法測定的靈敏度比較高的一類元素。堿金屬的沸點較低，通過火焰區(qū)能立刻蒸發(fā)產(chǎn)生背景吸收。2、堿土金屬檢測：堿土金屬元素（Be，Mg，Ca，Sr，Ba）在火焰中易生成氧化物和少量的MOH型化合物，原子化效率強烈地依賴于火焰組成和火焰高度，因此，必須仔細地控制燃氣和助燃氣的比例，恰當?shù)卣{(diào)節(jié)燃燒器的高度。3、有色金屬檢測：這一組元素包括Cu，Zn，Cd，Hg，Sn，Pb，Sb，Bi等。4、黑色金屬檢測：這一組元素包括Fe，Ni，Cr，Mo，Mn等。在合金中，這些元素常共存在一起。5、貴金屬檢測：貴金屬在某些試樣中含量比較低，一般要經(jīng)過化學富集之后才能進行檢測。6、難熔元素檢測：這組元素包括B，Be，Si，Ge，V，Nb，Ta，W，Th，U，Re，Sc，Y和稀土元素。它們?nèi)菀仔纬呻y離解的耐熔氧化物，必須在強還原性空氣—乙炔火焰中進行測定。</p><p style="text-indent:25px">原子吸收分光光度計常見的故障解決方法：故障現(xiàn)象：噴霧器鉑金管外管壁局部被堵塞，造成靈敏度下降或重現(xiàn)性變差。產(chǎn)生原因：當火焰分析靈敏度下降時，有些儀器操作者首先會檢查樣品的提升量，以判斷是否是噴霧器的原因，這種做法無疑是正確的。當檢查者發(fā)現(xiàn)樣品的提升量的確是下降了后，自然而然地聯(lián)想到是噴霧器被堵塞之故，于是用儀器附帶的細通絲來清通噴霧器的內(nèi)鉑金管；可是清通后，樣品的提升量并未得到提高，至此陷入了困惑。的確、噴霧器的鉑金管被堵塞是一種常見故障，用通絲清通也往往見效。但是噴霧器另一個隱性故障往往不是鉑金管管腔被堵，而是鉑金管外壁與外襯管間的環(huán)狀出氣縫隙被壓縮空氣中的油水等物所堵塞，造成空氣流通不足或不暢，從而影響到了提升量，這點是許多使用者不清楚的地方。在一定濃度范圍內(nèi)，原子吸收分光光度計吸收強度與試液中被測元素的含量成正比。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="原子吸收分光光度計對比,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991385859509/5179129.png"></div><p style="text-indent:25px">原子吸收分光光度計詳細組成部分如下：組成部分一：電光體系。在該體系中首要是由鎢燈和相應的電源組成，這種體系對整體的穩(wěn)定性就有很大影響，當該體系不能正常工作后也會導致儀器工作不穩(wěn)定。組成部分二：光學體系。這種體系包含有外光路體系和單色器2個首要部分，其間外光路和單色器都有很多類型，單色器便是紫外可見分光光度計散光的首要來歷。組成部分三：光電體系。該體系是紫外可見分光光度計要害的部件，體系會直接影響到儀器中的靈敏度和適用范圍，里邊有光電倍增管、光電管和硅光電池等。子吸收分光光度計使用的標準溶液在4℃溫度下可保存較長時間，放置室溫后可正常使用。暗箱原子吸收分光光度計報價</p><p style="text-indent:25px">點火時操作人員應處于儀器正面左側(cè)，且右側(cè)及正后方不能站人。原子吸收分光光度計對比</p><p style="text-indent:25px">電熱原子化器普遍應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30多種，若使用氧化亞氮—乙炔火焰，測定的元素可達70多種。但氧化亞氮—乙炔火焰安全性較差，應用不普遍?？諝狻胰不鹧嬖游辗止夤舛扔?，一般可檢測到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），相對標準偏差2%左右。汞(Hg)可用冷原子吸收法測定。原子吸收分光光度計對比</p></p><br /><p>文章來源地址: 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