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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>石油原子吸收分光光度計(jì)差價(jià),原子吸收分光光度計(jì)</p><p><span>***更新：</span>2021-01-30 09:16:38</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="rby32jb" 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="j2t7szr" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="febdk2b" class="box"><p><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)分析線。通常選用共振吸收線為分析線，測(cè)定高含量元素時(shí)，可以選用靈敏度較低的非共振吸收線為分析線。As、Se等共振吸收線位于200nm以下的遠(yuǎn)紫外區(qū)，火焰組分對(duì)其有明顯吸收，石油原子吸收分光光度計(jì)差價(jià)，故用火焰原子吸收法測(cè)定這些元素時(shí)，石油原子吸收分光光度計(jì)差價(jià)，不宜選用共振吸收線為分析線。2.原子吸收分光光度計(jì)狹縫寬度。狹縫寬度影響光譜通帶寬度與檢測(cè)器接受的能量。原子吸收光譜分析中，光譜重疊干擾的幾率小，可以允許使用較寬的狹縫，石油原子吸收分光光度計(jì)差價(jià)。調(diào)節(jié)不同的狹縫寬度，測(cè)定吸光度隨狹縫寬度而變化，當(dāng)有其它的譜線或非吸收光進(jìn)入光譜通帶內(nèi)，吸光度將立即減小。不引起吸光度減小的較大狹縫寬度，即為應(yīng)選取的合適的狹縫寬度。為使原子吸收分光光度計(jì)檢測(cè)功能在檢定期間內(nèi)處于正常的工作狀態(tài)，確保檢驗(yàn)結(jié)果的準(zhǔn)確性和有效性。石油原子吸收分光光度計(jì)差價(jià)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="石油原子吸收分光光度計(jì)差價(jià),原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991291551872/1267970.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)安全操作須知：實(shí)驗(yàn)室高壓氣體的安全管理。1.建議將氣瓶安裝在不受陽光直接照射的室外。2.注意不能讓氣瓶的溫度超過40°C，并且2m之內(nèi)不得有明火。3.氣瓶安放位置需牢靠穩(wěn)固，避免氣瓶翻倒、強(qiáng)烈震動(dòng)、擊撞或受強(qiáng)外力等情況的發(fā)生。4.氣瓶不得倒置、橫放或大幅度傾斜，需時(shí)刻保持直立。5.使用乙炔前，請(qǐng)安裝由正規(guī)廠家生產(chǎn)的乙炔專屬減壓閥。為了防止金屬和乙炔發(fā)生化合作用，請(qǐng)不要使用銅、銀、汞以及它們的合金做成的管道。這些化合物與乙炔會(huì)生成金屬乙炔化物，受到?jīng)_擊后可能分解而爆開。6.乙炔氣瓶含有可溶解性的物質(zhì)。若氣瓶?jī)?nèi)壓力低于0.50MPa,為了避免可溶解性物質(zhì)的擴(kuò)散，請(qǐng)更換新的乙炔氣瓶。元素原子吸收分光光度計(jì)廠家原子吸收分光光度計(jì)應(yīng)用也有一定的局限性。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="石油原子吸收分光光度計(jì)差價(jià),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。</p><p style="text-indent:25px">原子吸收分光光度計(jì)基線漂移測(cè)試注意事項(xiàng)：①我國(guó)的原子吸收分光光度計(jì)計(jì)量檢定規(guī)程規(guī)定：測(cè)試基線漂移時(shí)銅燈預(yù)熱3min，這是不妥的。因?yàn)閺睦碚撋现v，銅燈一般在30min左右才能達(dá)到穩(wěn)定狀態(tài)，所以操作時(shí)應(yīng)該預(yù)熱30min。②雙光束和單光束的測(cè)試結(jié)果不應(yīng)該相同，因?yàn)閺睦碚撋现v，雙光束測(cè)試指標(biāo)應(yīng)稍優(yōu)于單光束儀器，否則雙光束儀器沒有意義。③計(jì)量檢定規(guī)程規(guī)定測(cè)試基線漂移的時(shí)間為30min，這也是欠妥當(dāng)?shù)?。目前，?guó)際上的做法是連續(xù)測(cè)試一小時(shí)。然而，有些制造廠商采用測(cè)試lOmin或測(cè)試30min等，來作為基線漂移的測(cè)試時(shí)間，這是不科學(xué)的。因?yàn)?，如果使用者做一個(gè)實(shí)驗(yàn)，在lOmin內(nèi)還未做完，儀器的基線就已經(jīng)漂掉了，這怎么能保證分析測(cè)試數(shù)據(jù)的可靠性呢?30min的測(cè)試時(shí)間也不科學(xué)，因?yàn)榭招年帢O燈是一種氣體放電燈，從物理學(xué)或從氣體發(fā)光的理論來講，一般的氣體放電燈其發(fā)光要在30min左右才能達(dá)到穩(wěn)定。特別是1Omin時(shí)間，燈泡的發(fā)光也未達(dá)到較佳值，何況還有其他比較多因素決定了儀器還未達(dá)到測(cè)試穩(wěn)定的狀態(tài)。所以，測(cè)試穩(wěn)定性應(yīng)該保證一小時(shí)才能得出正確的結(jié)果。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="石油原子吸收分光光度計(jì)差價(jià),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)利用待測(cè)元素的共振輻射，原子吸收分光光度計(jì)價(jià)格通過其原子蒸汽，測(cè)定其吸光度的裝置稱為原子吸收分光光度計(jì)。原子吸收分光光度計(jì)價(jià)格它有單光束，雙光束，雙波道，多波道等結(jié)構(gòu)形式。其基本結(jié)構(gòu)包括光源，原子化器，光學(xué)系統(tǒng)和檢測(cè)系統(tǒng)。它主要用于痕量元素雜質(zhì)的分析，具有靈敏度高及選擇性好兩大主要優(yōu)點(diǎn)。普遍應(yīng)用于各種氣體，金屬有機(jī)化合物，金屬醇鹽中微量元素的分析。但是測(cè)定每種元素均需要相應(yīng)的空心陰極燈，這對(duì)檢測(cè)工作帶來不便。霧化器：霧化器作用是將試液霧化。暗箱原子吸收分光光度計(jì)比較</p><p style="text-indent:25px">原子吸收分光度計(jì)分析樣品優(yōu)點(diǎn)：操作方便、快速。石油原子吸收分光光度計(jì)差價(jià)</p><p style="text-indent:25px">火焰原子化器火焰原子化包括兩個(gè)步驟:先將試樣溶液變成細(xì)小霧滴（即霧化階段），然后使霧滴接受火焰供給的能量形成基態(tài)原子（即原子化階段）?；鹧嬖踊饔伸F化器、預(yù)混室和燃燒器等部分組成。嘛余霧化器的作用是將試液霧化成微小的霧滴。霧化器的性能會(huì)對(duì)靈敏度、測(cè)量精度和化學(xué)干擾等產(chǎn)生影響，因此要求其噴霧穩(wěn)定、霧滴細(xì)微均勻和霧化效率高。目前，商品原子化器多數(shù)使用氣動(dòng)型霧化器。塑預(yù)混室也稱霧化室，其作用是進(jìn)一步細(xì)化霧滴，并使之與燃料氣均勻混合后進(jìn)入火焰。燃燒器的作用是使燃?xì)庠谥細(xì)獾淖饔孟滦纬苫鹧妫惯M(jìn)入火焰的試樣微粒原子化。原子吸收光譜分析較常用的火焰是空氣-乙炔火焰和氧化亞氮（笑氣）-乙炔火焰。當(dāng)采用不同的燃燒氣時(shí)，應(yīng)注意調(diào)整燃燒器的狹縫寬度和長(zhǎng)度以適應(yīng)不同燃燒氣的燃燒速率，防止回火爆開。由于火焰原子化法的操作簡(jiǎn)便，重現(xiàn)性好，有效光程大，對(duì)大多數(shù)元素有較高靈敏度，因此應(yīng)用普遍。但火焰原子化法原子化效率低，靈敏度不夠高，而且一般不能直接分析固體樣品?；鹧嬖踊ㄟ@些不足之處，促使無火焰原子化法的發(fā)展。石油原子吸收分光光度計(jì)差價(jià)</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3080588.html</p></div></div></div></div></div><div id="nct8o3w" class="page-right twoColRt"><div id="wl7a28a" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="bqjahyv" class="recomPic likePro"><a 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