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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>高校原子吸收分光光度計(jì)選擇,原子吸收分光光度計(jì)</p><p><span>***更新：</span>2021-02-02 05:14:51</p><p><span id="click" >瀏覽次數(shù)：4次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="lzz3mru" 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(huà): </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(xiàn)] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="uahaoog" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="jtlsc0s" class="box"><p><p style="text-indent:25px">原子吸收分光光度計(jì)儀器分類(lèi)：1、火焰原子化法的優(yōu)點(diǎn)是：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。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，高校原子吸收分光光度計(jì)選擇，適用于難熔元素的測(cè)定。缺點(diǎn)是：試樣組成不均勻性的影響較大，測(cè)定精密度較低，共存化合物的干擾比火焰原子化法大，高校原子吸收分光光度計(jì)選擇，高校原子吸收分光光度計(jì)選擇，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)安全操作須知：注意不能讓氣瓶的溫度超過(guò)40°C，并且2m之內(nèi)不得有明火。高校原子吸收分光光度計(jì)選擇</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高校原子吸收分光光度計(jì)選擇,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991311337342/3521940.png"></div><p style="text-indent:25px">火焰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，若使用氧化亞氮—乙炔火焰，測(cè)定的元素可達(dá)70多種。但氧化亞氮—乙炔火焰安全性較差，應(yīng)用不普遍。空氣—乙炔火焰原子吸收分光光度法，一般可檢測(cè)到PPm級(jí)（10－6），精密度1％左右。國(guó)產(chǎn)的火焰原子吸收分光光度計(jì)，都可配備各種型號(hào)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(cè)定砷（As）、銻（Sb）、鍺（Ge）、碲（Te）等元素。一般靈敏度在ng／ml級(jí)（10－9），相對(duì)標(biāo)準(zhǔn)偏差2％左右。汞(Hg)可用冷原子吸收法測(cè)定。食品安全原子吸收分光光度計(jì)代理石墨爐法，進(jìn)樣量少，靈敏度高，有的元素也可以分析到pg/mL級(jí)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高校原子吸收分光光度計(jì)選擇,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988188495975/1516361.png"></div><p style="text-indent:25px">霧化器是原子化系統(tǒng)的中心部件，剖析的靈活度和精細(xì)度比較大水平上取決于霧化器的質(zhì)量。質(zhì)量良好的噴霧器,應(yīng)是霧滴小、霧量大、霧滴勻、噴霧穩(wěn),這取決于吸液毛細(xì)管?chē)娍诤凸?jié)流嘴端面的相對(duì)位置和同心度。毛細(xì)管和節(jié)流嘴端面相對(duì)位置和同心度,應(yīng)在放大鏡下精心調(diào)理。每次調(diào)整效果可經(jīng)過(guò)察看霧化情況來(lái)判別。正常狀況下,霧滴分開(kāi)噴嘴后應(yīng)沿毛細(xì)管線(xiàn)方向,向前成一錐形,上下左右對(duì)稱(chēng)地散射開(kāi)。也可經(jīng)過(guò)吸噴規(guī)范溶液測(cè)定吸光度來(lái)判別,直至呈現(xiàn)大吸光度時(shí),行將位置固定下來(lái)。需求指出的是,任何時(shí)分一定制止在氧化亞氮一乙烘火焰中調(diào)理噴霧器,否則會(huì)發(fā)作回火。</p><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(yáng)光直接照射的室外。2.注意不能讓氣瓶的溫度超過(guò)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(chǎng)家生產(chǎn)的乙炔專(zhuān)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(kāi)。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。子吸收分光光度計(jì)使用的標(biāo)準(zhǔn)溶液在4℃溫度下可保存較長(zhǎng)時(shí)間，放置室溫后可正常使用。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高校原子吸收分光光度計(jì)選擇,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">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(guò)其原子蒸汽，測(cè)定其吸光度的裝置稱(chēng)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(lái)不便。原子吸收分光光度計(jì)，有火焰原子吸收分光光度計(jì)和帶石墨爐的原子吸收分光光度計(jì)兩種。食品安全原子吸收分光光度計(jì)代理</p><p style="text-indent:25px">原子吸收分光度計(jì)分析樣品優(yōu)點(diǎn)：靈敏度高。高校原子吸收分光光度計(jì)選擇</p><p style="text-indent:25px">原子吸收分光光度計(jì)，有火焰原子吸收分光光度計(jì)和帶石墨爐的原子吸收分光光度計(jì)兩種。前者原子化的溫度在2100℃～2400℃之間，后者在2900℃～3000℃之間?；鹧嬖游辗止夤舛扔?jì)，利用空氣—乙炔測(cè)定的元素可達(dá)30多種，若使用笑氣—乙炔火焰，測(cè)定的元素可達(dá)70多種。但笑氣—乙炔火焰安全性較差，客戶(hù)應(yīng)用不普遍，基本上實(shí)驗(yàn)室都取締了?？諝狻胰不鹧嬖游辗止夤舛确?，一般可檢測(cè)到PPm級(jí)（10-6），精密度1%左右。國(guó)產(chǎn)的火焰原子吸收分光光度計(jì)，AA-1800C，都可配備各種型號(hào)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(cè)定砷（As）、銻（Sb）、鍺（Ge）、碲（Te）等元素。一般靈敏度在ng/ml級(jí)（10－9），相對(duì)標(biāo)準(zhǔn)偏差2%左右。汞(Hg)可用冷原子吸收法測(cè)定。石墨爐原子吸收分光光度計(jì)，可以測(cè)定近50種元素。石墨爐法，進(jìn)樣量少，靈敏度高，有的元素也可以分析到pg/ml級(jí)。高校原子吸收分光光度計(jì)選擇</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3121180.html</p></div></div></div></div></div><div id="x8hd3yg" class="page-right twoColRt"><div id="083hd8i" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="uhg3xt5" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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