國產(chǎn)**原子吸收分光光度計(jì)銷售廠家推薦咨詢上海儀電分析儀器供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="火焰原子吸收光譜儀使用光源大都是空心陰極燈，國產(chǎn)**原子吸收分光光度計(jì)銷售廠家，空心陰極燈的燈電流大小決定著燈輻射強(qiáng)度。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。如果燈電流過大，會導(dǎo)致燈本身發(fā)生自蝕現(xiàn)象而縮"><meta name="keywords" content="國產(chǎn)**原子吸收分光光度計(jì)銷售廠家,原子吸收分光光度計(jì)"><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 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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>國產(chǎn)**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>2021-01-31 03:12:44</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="3lhzop3" 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="nbt8k7l" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="3su3l97" class="box"><p><p style="text-indent:25px">火焰原子吸收光譜儀使用光源大都是空心陰極燈，國產(chǎn)**原子吸收分光光度計(jì)銷售廠家，空心陰極燈的燈電流大小決定著燈輻射強(qiáng)度。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。如果燈電流過大，會導(dǎo)致燈本身發(fā)生自蝕現(xiàn)象而縮短燈使用壽命;會放電不正常。相反，在一定范圍內(nèi)降低燈電流可以降低輻射強(qiáng)度，儀器靈敏度提高，但燈穩(wěn)定性和信噪比下降。因此，國產(chǎn)**原子吸收分光光度計(jì)銷售廠家，在具體檢測工作中，如被測樣濃度高時(shí)，則使用較大燈電流，以獲得較好穩(wěn)定性;如被測樣濃度低時(shí)，則在保證穩(wěn)定性滿足要求的前提下，國產(chǎn)**原子吸收分光光度計(jì)銷售廠家，使用較低的燈電流，以獲得較好的靈敏度。電熱原子化器普遍應(yīng)用的是原子吸收分光光度計(jì)。國產(chǎn)**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="國產(chǎn)**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/ydfx123/637419988134237392/1056352.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)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(diǎn)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(qiáng)烈地依賴于火焰組成和火焰高度，因此，必須仔細(xì)地控制燃?xì)夂椭細(xì)獾谋壤?，恰?dāng)?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(xué)富集之后才能進(jìn)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(qiáng)還原性空氣—乙炔火焰中進(jìn)行測定。國產(chǎn)原子吸收分光光度計(jì)怎么樣原子吸收分光光度計(jì)具有靈敏度高及選擇性好兩大主要優(yōu)點(diǎn)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國產(chǎn)**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">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，所以這種火焰適用于堿金屬元素的測定?；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，適用于測定較易于形成難熔氧化物的元素如鑰、稀土元素等。</p><p style="text-indent:25px">原子吸收光譜儀分析中的干擾效應(yīng)：1、電離干擾：在高溫下原子電離，使基態(tài)原子的濃度減少，引起原子吸收信號降低，此種干擾稱為電離干擾。電離效應(yīng)隨溫度升高、電離平衡常數(shù)增大而增大，隨被測元素濃度增高而減小。加入更易電離的堿金屬元素，可以有效地消除電離干擾。2、光譜干擾：光譜干擾包括譜線重疊、光譜通帶內(nèi)存在非吸收線、原子化池內(nèi)的直流發(fā)射、分子吸收、光散射等。當(dāng)采用銳線光源和交流調(diào)制技術(shù)時(shí)，主要考慮分子吸收和光散射的影響，它們是形成光譜背景的主要因素。原子吸收分光光度計(jì)采用新的電子技術(shù)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國產(chǎn)**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/ydfx123/637419991252020619/9480950.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)儀器分類：1、火焰原子化法的優(yōu)點(diǎn)是：火焰原子化法的操作簡便，重現(xiàn)性好，有效光程大，對大多數(shù)元素有較高靈敏度，因此應(yīng)用普遍。缺點(diǎn)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(diǎn)是：原子化效率高，在可調(diào)的高溫下試樣利用率達(dá)100%，靈敏度高，試樣用量少，適用于難熔元素的測定。缺點(diǎn)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(yán)重，一般都需要校正背景。原子吸收分光光度計(jì)使對難溶元素的測定靈敏度還不夠理想。國產(chǎn)**原子吸收分光光度計(jì)銷售廠家</p><p style="text-indent:25px">原子吸收光譜儀又稱原子吸收分光光度計(jì)。國產(chǎn)**原子吸收分光光度計(jì)銷售廠家</p><p style="text-indent:25px">理論研討和實(shí)驗(yàn)結(jié)果標(biāo)明，干擾的大小取決于吸收線堆疊水平，干擾元素的濃度及其靈活度。當(dāng)兩種元素的吸收線的波長差小于0.03nm時(shí)，則以為吸收線堆疊干擾是嚴(yán)重的。若堆疊的吸收線是靈活線，即便相差0.1nm，干擾也會明顯表現(xiàn)出來。當(dāng)然這種干擾還和干擾元素的濃度及單色儀的分辨率有關(guān)。有一些譜線，在理論上是堆疊線，但實(shí)驗(yàn)中并沒有察看到干擾。有可能是干擾元素在測定條件下原子化效率低而未能產(chǎn)生足夠的基態(tài)原子，也可能這些干擾元素的吸收線靈活度比較低，所以在通常狀況下表現(xiàn)不出來。消弭這種干擾普通是選用其它的剖析線或預(yù)別離干擾元素。國產(chǎn)**原子吸收分光光度計(jì)銷售廠家</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3087701.html</p></div></div></div></div></div><div id="8fmjgik" class="page-right twoColRt"><div id="z398rgs" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="8f79hgn" 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) 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