高性能原子吸收分光光度計(jì)廠家誠信互利上海儀電分析儀器供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="原子吸收分光光度計(jì)的安全運(yùn)用留意事項(xiàng)：1，高性能原子吸收分光光度計(jì)廠家、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(yīng)與氧化性氣源同放。2、排放的廢液應(yīng)及時(shí)傾倒處理或與當(dāng)?shù)丨h(huán)保部門。3、禁止帶電插拔數(shù)據(jù)線纜。4、在日常作業(yè)中應(yīng)經(jīng)常檢查"><meta name="keywords" content="高性能原子吸收分光光度計(jì)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" 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style="text-indent:25px">原子吸收分光光度計(jì)的安全運(yùn)用留意事項(xiàng)：1，高性能原子吸收分光光度計(jì)廠家、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(yīng)與氧化性氣源同放。2、排放的廢液應(yīng)及時(shí)傾倒處理或與當(dāng)?shù)丨h(huán)保部門。3、禁止帶電插拔數(shù)據(jù)線纜。4、在日常作業(yè)中應(yīng)經(jīng)常檢查乙炔鋼瓶與減壓閥連接是否結(jié)實(shí)無漏氣。5、留意燃燒、關(guān)火次序。燃燒后操作人員不得離開！在當(dāng)天不必儀器操作時(shí),請(qǐng)將乙炔管道里的剩下氣體燃燒完，即直接關(guān)乙炔總開關(guān)再管空氣。6、帶石墨爐的儀器必定要留意用電安全,因?yàn)闀?huì)運(yùn)用380V動(dòng)力電，加熱時(shí)瞬間會(huì)發(fā)生比較大的電流，高性能原子吸收分光光度計(jì)廠家,所以在石墨爐處于作業(yè)狀況時(shí)，高性能原子吸收分光光度計(jì)廠家，不要直接觸碰爐體部分，避免造成風(fēng)險(xiǎn).在做試驗(yàn)時(shí)隨時(shí)調(diào)查氬氣的總壓力和內(nèi)氣流量計(jì)的流量,以確保石墨管可以長(zhǎng)期運(yùn)用和試驗(yàn)的準(zhǔn)確和一致性。點(diǎn)火時(shí)操作人員應(yīng)處于儀器正面左側(cè)，且右側(cè)及正后方不能站人。高性能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="高性能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/ydfx123/637419988150712025/4463747.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(cè)定時(shí)必須將試樣室蓋打開，使光路切斷，以延長(zhǎng)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(duì)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(zhǎng)期不用時(shí)，需用將儀器使用防護(hù)罩罩住。上海原子吸收分光光度計(jì)廠家1970年北京科學(xué)儀器廠試制成WFD-Y1型單光束原子吸收分光光度計(jì)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高性能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">如何才能正確選擇原子吸收分光光度計(jì)？1、原子吸收分光光度計(jì)空心陰極燈的工作電流。空心陰極燈一般需要預(yù)熱10-30min才能達(dá)到穩(wěn)定輸出。燈電流過小，放電不穩(wěn)定，故光譜輸出不穩(wěn)定，且光譜輸出強(qiáng)度小;燈電流過大，發(fā)射譜線變寬，導(dǎo)致靈敏度下降，校正曲線彎曲，燈壽命縮短。選用燈電流的一般原則是，在保證有足夠強(qiáng)且穩(wěn)定的光強(qiáng)輸出條件下，盡量使用較低的工作電流。通常以空心陰極燈上標(biāo)明的Z大電流的一半至三分之二作為工作電流。在具體的分析場(chǎng)合，較適宜的工作電流由實(shí)驗(yàn)確定。2、原子吸收分光光度計(jì)進(jìn)樣量。進(jìn)樣量過小，吸收信號(hào)弱，不便于測(cè)量;進(jìn)樣量過大，在火焰原子化法中，對(duì)火焰產(chǎn)生冷卻效應(yīng)，在石墨爐原子化法中，會(huì)增加除殘的困難。在實(shí)際工作中，應(yīng)測(cè)定吸光度隨進(jìn)樣量的變化，達(dá)到滿意的吸光度的進(jìn)樣量，即為應(yīng)選擇的進(jìn)樣量。</p><p style="text-indent:25px">原子吸收分光光度計(jì)按光束形成可分為單光束（指從光源中發(fā)出的光只以單一光束的形式通過原子化器、單色器和檢測(cè)系統(tǒng)）和雙光束（指從光源發(fā)出的光被切光器分成兩束強(qiáng)度相等的光，一束為樣品光束通過原子化器被基態(tài)原子部分吸收；另一束只作為參比光束，不通過原子化器，其光強(qiáng)度不被減弱）兩類；按包含“單獨(dú)”的分光系統(tǒng)和檢測(cè)系統(tǒng)的數(shù)目又可分為單道（指儀器只有一個(gè)光源，一個(gè)單色器，一個(gè)顯示系統(tǒng)，每次只能測(cè)一種元素）、雙道（指儀器有兩個(gè)不同光源，兩個(gè)單色器兩個(gè)檢測(cè)顯示系統(tǒng)）和多道。目前普遍使用的是單道單光束或單道雙光束原子吸收分光光度計(jì)。原子吸收分光光度計(jì)型號(hào)繁多，不同型號(hào)儀器性能和應(yīng)用范圍不同。原子吸收分光光度計(jì)主要用于痕量元素雜質(zhì)的分析。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高性能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/ydfx123/637419988246893719/5353894.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)原子化條件：程序升溫的條件選擇:在石墨爐原子化法中，合理選擇干燥、灰化、原子化及除殘溫度與時(shí)間是十分重要的。干燥應(yīng)在稍低于溶劑沸點(diǎn)的溫度下進(jìn)行，以防止試液飛濺?；一哪康氖浅セw和局外組分，在保證被測(cè)元素沒有損失的前提下應(yīng)盡可能使用較高的灰化溫度。原子化溫度的選擇原則是，選用達(dá)到較大吸收信號(hào)的較低溫度作為原子化溫度。原子化時(shí)間的選擇，應(yīng)以保證完全原子化為準(zhǔn)。原子化階段停止通保護(hù)氣，以延長(zhǎng)自由原子在石墨爐內(nèi)的平均停留時(shí)間。除殘的目的是為了消除殘留物產(chǎn)生的記憶效應(yīng)，除殘溫度應(yīng)高于原子化溫度。原子吸收分光光度計(jì)，利用空氣—乙炔測(cè)定的元素可達(dá)30多種。國產(chǎn)**原子吸收分光光度計(jì)比較</p><p style="text-indent:25px">原子吸收分光光度計(jì)采用新的電子技術(shù)。高性能原子吸收分光光度計(jì)廠家</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(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?；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(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。高性能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/3180205.html</p></div></div></div></div></div><div id="ih8xegi" class="page-right twoColRt"><div id="ujgipr8" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="7k2qcz8" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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