**原子吸收分光光度計代理服務為先上海儀電分析儀器供應-b2b網站_b2b電子商務平臺【買產品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="儀器出廠前需經質檢部門按專業(yè)規(guī)范或企業(yè)規(guī)范檢定。實驗室中的儀器也需經計量部門按檢定規(guī)程定期檢定前方可運用,理解和控制儀器的檢定驗收技術尤為重要。本節(jié)引見有關儀器主要技術指標的測試和檢定辦法。譜線的理論波長與儀器波長機構讀數的差值稱為波長示值"><meta name="keywords" content="**原子吸收分光光度計代理,原子吸收分光光度計"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" content="no-transform" /> <meta 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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="zyaxzgy" 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="ztv23nh" class="content"><p><span>需求數量：</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>產品關鍵詞：</span>**原子吸收分光光度計代理,原子吸收分光光度計</p><p><span>***更新：</span>2021-02-04 00:21:25</p><p><span id="click" >瀏覽次數：2次</span></p><a rel="nofollow" class="button">聯系我們</a></div></div><div id="e7vmj7r" 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="7qxzwip" class="page-proshow02"><p class="title">詳細說明</p><div id="afcubtv" class="box"><p><p style="text-indent:25px">儀器出廠前需經質檢部門按專業(yè)規(guī)范或企業(yè)規(guī)范檢定。實驗室中的儀器也需經計量部門按檢定規(guī)程定期檢定前方可運用,理解和控制儀器的檢定驗收技術尤為重要。本節(jié)引見有關儀器主要技術指標的測試和檢定辦法。譜線的理論波長與儀器波長機構讀數的差值稱為波長示值誤差。目前,原子吸收分光光度計大多以正弦機構調理波長。商品儀器經過長途運輸的振動,波長示值可能超差，**原子吸收分光光度計代理。按波長次第假如一直是正誤差或負誤差,但差值不等,能夠經過調整正弦機構來校正；若差值大致相等,則可調理波長鼓輪或數碼輪來校正；若差值隨波長變化而正負動搖,則需重新調理光學系統(tǒng)。專業(yè)規(guī)范和檢定規(guī)程請求,波長示值誤差應不大于0.5nm，波長反復性應優(yōu)于0.3nm。原子吸收分光光度計由于儀器使用中，**原子吸收分光光度計代理，需用乙炔、氫氣，**原子吸收分光光度計代理、氬氣、氧化亞氮（俗稱笑氣）等。**原子吸收分光光度計代理</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代理,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作用：原子吸收分光光度計的作用是進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化為氣態(tài)原子蒸汽，由于元素不同，導致特征譜線不同，不同的原子會吸收其特征波長的光子。這時候從光源（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（I0）和吸收后的光強(I)，用比爾定律得出吸收比率，進而用標準曲線法或者標準加入法計算濃度。車載原子吸收分光光度計單價火焰原子吸收分光光度計對大多數元素有較高靈敏度。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="**原子吸收分光光度計代理,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儀器分類：1、火焰原子化法的優(yōu)點是：火焰原子化法的操作簡便，重現性好，有效光程大，對大多數元素有較高靈敏度，因此應用普遍。缺點是：原子化效率低，靈敏度不夠高，而且一般不能直接分析固體樣品；2、石墨爐原子化器的優(yōu)點是：原子化效率高，在可調的高溫下試樣利用率達100%，靈敏度高，試樣用量少，適用于難熔元素的測定。缺點是：試樣組成不均勻性的影響較大，測定精密度較低，共存化合物的干擾比火焰原子化法大，干擾背景比較嚴重，一般都需要校正背景。</p><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?；瘜W計量焰是按化學計量關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。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。</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代理,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988246893719/5353894.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，恰當地調節(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。它們容易形成難離解的耐熔氧化物，必須在強還原性空氣—乙炔火焰中進行測定。原子吸收分光光度計安全操作須知：點火前排風裝置必須打開。水質原子吸收分光光度計單價</p><p style="text-indent:25px">點火時操作人員應處于儀器正面左側，且右側及正后方不能站人。**原子吸收分光光度計代理</p><p style="text-indent:25px">原子吸收分光光度計的安全運用留意事項：1、乙炔氣源鄰近禁止明火或過熱高溫物體寄存，乙炔氣源不應與氧化性氣源同放。2、排放的廢液應及時傾倒處理或與當地環(huán)保部門。3、禁止帶電插拔數據線纜。4、在日常作業(yè)中應經常檢查乙炔鋼瓶與減壓閥連接是否結實無漏氣。5、留意燃燒、關火次序。燃燒后操作人員不得離開！在當天不必儀器操作時,請將乙炔管道里的剩下氣體燃燒完，即直接關乙炔總開關再管空氣。6、帶石墨爐的儀器必定要留意用電安全,因為會運用380V動力電，加熱時瞬間會發(fā)生比較大的電流,所以在石墨爐處于作業(yè)狀況時，不要直接觸碰爐體部分，避免造成風險.在做試驗時隨時調查氬氣的總壓力和內氣流量計的流量,以確保石墨管可以長期運用和試驗的準確和一致性。**原子吸收分光光度計代理</p></p><br /><p>文章來源地址: 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