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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="wik3fdd" class="content"><p><span>需求數(shù)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(chǎn)品關(guān)鍵詞：</span>教學(xué)原子吸收分光光度計設(shè)備,原子吸收分光光度計</p><p><span>***更新：</span>2021-01-06 03:11:36</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="crya2ry" 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="oda7lbj" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="pe8onri" class="box"><p><p style="text-indent:25px">原子吸收光譜儀配件的根本原理儀器從光源輻射出具有待測元素特征譜線的光，經(jīng)過試樣蒸氣時被蒸氣中待測元素基態(tài)原子所吸收，由輻射特征譜線光被削弱的程度來測定試樣中待測元素的含量。原子吸收光譜儀配件的使用因原子吸收光譜儀的活絡(luò)、準(zhǔn)確、簡潔等特點(diǎn)，現(xiàn)已多用于冶金、地質(zhì)、采礦、石油，教學(xué)原子吸收分光光度計設(shè)備、輕工、農(nóng)業(yè)、醫(yī)藥，教學(xué)原子吸收分光光度計設(shè)備、衛(wèi)生、食物及環(huán)境監(jiān)測等方面的常量及微痕量元素剖析。原子吸收光譜法是根據(jù)從光源發(fā)射的待測元素的特征輻射經(jīng)過樣品蒸氣時,被蒸氣中待測元素的基態(tài)原子所吸收，教學(xué)原子吸收分光光度計設(shè)備,根據(jù)輻射強(qiáng)度的削弱程度以求得樣品中待測元素的含量。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。教學(xué)原子吸收分光光度計設(shè)備</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="教學(xué)原子吸收分光光度計設(shè)備,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988150712025/4463747.png"></div><p style="text-indent:25px">哪些是原子吸收分光光度計的特點(diǎn)?原子吸收分光光度計(AAS)簡稱原子吸收法，是使用被測元素基態(tài)原子蒸氣對其共振輻射線的吸收特性進(jìn)行元素定量剖析的方法。原子吸收分光光度計具有以下特色：①靈敏度高：慣例剖析法對大多數(shù)元素可到達(dá)ppm級;使用特別手法可到達(dá)ppb級的濃度范圍;②精密度好：一般測定RSD約為1%～3%，使用特別方法精密度可小于1%。③使用范圍廣：周期表中70多種元素可使用該法測定：④干擾少：原子吸收光譜為分立的銳線光譜，且譜線堆疊性少，干擾性小;⑤試樣用量少：選用石墨爐無火焰原子吸收法，每次丈量*需5～20μl試液或0.05～10mg的固體試樣;⑥快速簡潔，易于自動化：液體試樣?？芍苯舆M(jìn)樣，一般樣品無需進(jìn)行預(yù)別離處理，新型號產(chǎn)品儀器的進(jìn)樣和測定步驟全部自動化完成。常見原子吸收分光光度計賣價原子吸收分光光度計氧化亞氮—乙炔火焰安全性較差。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="教學(xué)原子吸收分光光度計設(shè)備,原子吸收分光光度計" 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的工作原理：原子吸收光譜儀又稱原子吸收分光光度計，根據(jù)物質(zhì)基態(tài)原子蒸汽對特征輻射吸收的作用來進(jìn)行金屬元素分析。它能夠靈敏可靠地測定微量或痕量元素。原子吸收分光光度計一般由四大部分組成，即光源(單色銳線輻射源)、試樣原子化器、單色儀和數(shù)據(jù)處理系統(tǒng)(包括光電轉(zhuǎn)換器及相應(yīng)的檢測裝置)。元素在熱解石墨爐中被加熱原子化，成為基態(tài)原子蒸汽，對空心陰極燈發(fā)射的特征輻射進(jìn)行選擇性吸收。在一定濃度范圍內(nèi)，其吸收強(qiáng)度與試液中被的含量成正比。</p><p style="text-indent:25px">金屬化學(xué)形態(tài)分析中的應(yīng)用：通過氣相色譜和液體色譜分離然后以原子吸收光譜加以測定，可以分析同種金屬元素的不同有機(jī)化合物。例如汽油中5種烷基鉛，大氣中的5種烷基鉛、烷基硒、烷基胂、烷基錫，水體中的烷基胂、烷基鉛、烷基揭、烷基汞、有機(jī)鉻，生物中的烷基鉛、烷基汞、有機(jī)鋅、有機(jī)銅等多種金屬有機(jī)化合物，均可通過不同類型的光譜原子吸收聯(lián)用方式加以鑒別和測定?？傠娫粗甘緹舨涣凉收显颍簝x器電源線斷路或接觸不良2.儀器保險絲熔斷3.保險管接觸不良。原子吸收分光光度計由于儀器使用中，需用乙炔、氫氣、氬氣、氧化亞氮（俗稱笑氣）等。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="教學(xué)原子吸收分光光度計設(shè)備,原子吸收分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988188495975/1516361.png"></div><p style="text-indent:25px">原子吸收分光光度計內(nèi)標(biāo)法是在試樣各含量不同的一系列規(guī)范試樣中，分別參加固定量的純物質(zhì)，即內(nèi)標(biāo)物。在規(guī)范條件下測定剖析元素和內(nèi)標(biāo)元素的吸光度比，以此比值對濃度作圖，制作規(guī)范曲線，在同樣條件下，測定試樣中被測元素和內(nèi)標(biāo)元素的吸光度比值，在從規(guī)范曲線上讀取對應(yīng)的濃度。長處：可以減少試驗(yàn)條件按變化引起的隨機(jī)誤差，進(jìn)步精細(xì)度。缺乏：需要使用雙通道原子吸收光譜儀，使用上受到限制。剖析速度快，可多元素和常量、微量元素一起進(jìn)行剖析。一般的發(fā)射光譜剖析法不適用于測定樣品中含量高的元素，假如通過辦法研究滿意了準(zhǔn)確測定高含量元素的要求，則常不能滿意微量元素的需要。采用電感耦合等離子體發(fā)射光譜剖析辦法成功地處理了這類問題。原子吸收分光光度計計算機(jī)數(shù)據(jù)處理系統(tǒng)使整個分析實(shí)現(xiàn)自動化。教學(xué)原子吸收分光光度計設(shè)備</p><p style="text-indent:25px">原子吸收分光光度計定量關(guān)系可用郎伯-比耳定律。教學(xué)原子吸收分光光度計設(shè)備</p><p style="text-indent:25px">原子吸收分光光度計測土壤巖石中砷銻鉍汞時常見問題的剖析：氫化物的產(chǎn)生條件與技術(shù)指標(biāo)是作業(yè)曲線是否滿足要求的條件，測驗(yàn)不同的元素應(yīng)設(shè)定不同的氫化物的產(chǎn)生條件，條件的設(shè)定符合儀器使用說明書中給定的推薦剖析條件。在測驗(yàn)規(guī)范系列時，如儀器靈敏度不符合要求，則應(yīng)加大負(fù)高壓或加大電流，從頭測定空白，然后測規(guī)范系列。別的，當(dāng)規(guī)范系列含量太低時，該儀器靈敏度達(dá)不到。規(guī)范貯備液主張購買國家規(guī)范物質(zhì)中間制造的規(guī)范溶液。在配置的過程中應(yīng)注意所用水、試劑、容器的污染問題，所用容器應(yīng)該在使用前用硝酸溶液浸泡24小時，沖凈后使用。規(guī)范溶液在長期貯備過程中也會出現(xiàn)蒸發(fā)，因而需要確保規(guī)范溶液在有效期之內(nèi)。教學(xué)原子吸收分光光度計設(shè)備</p><p style="text-indent:25px">上海儀電分析儀器有限公司致力于儀器儀表，以科技創(chuàng)新實(shí)現(xiàn)***管理的追求。儀電分析深耕行業(yè)多年，始終以客戶的需求為向?qū)?，為客戶提?**的分光光度計，氣相色譜，原子吸收，食品安全。儀電分析始終以本分踏實(shí)的精神和必勝的信念，影響并帶動團(tuán)隊取得成功。儀電分析始終關(guān)注儀器儀表市場，以敏銳的市場洞察力，實(shí)現(xiàn)與客戶的成長共贏。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2721207.html</p></div></div></div></div></div><div id="ztl88ta" class="page-right twoColRt"><div id="nc38k8h" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="rwya8vs" 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