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src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988134237392/1056352.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="bqxzwlm" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419988134237392/1056352.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="tc38gyf" 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>工廠原子吸收分光光度計(jì)單價(jià),原子吸收分光光度計(jì)</p><p><span>***更新：</span>2021-01-31 04:12:57</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="3ss8mjq" 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="wlikcg3" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="fel7gip" class="box"><p><p style="text-indent:25px">目前原子吸收法已用來(lái)測(cè)定地質(zhì)樣品中70多種元素，并且大部分能夠達(dá)到足夠的靈敏度和比較好的精密度。鋼鐵、合金和高純金屬中多種痕量元素的分析現(xiàn)在也多用原子吸收法。原子吸收在食品分析中越來(lái)越普遍。食品和飲料中的20多種元素已有滿意的原子吸收分析方法，工廠原子吸收分光光度計(jì)單價(jià)，工廠原子吸收分光光度計(jì)單價(jià)。生化和臨床樣品中必需元素和有害元素的分析現(xiàn)已采用原子吸收法。有關(guān)石油產(chǎn)品、陶瓷，工廠原子吸收分光光度計(jì)單價(jià)、農(nóng)業(yè)樣品、藥物和涂料中金屬元素的原子吸收分析的文獻(xiàn)報(bào)道近些年來(lái)越來(lái)越多。水體和大氣等環(huán)境樣品的微量金屬元素分析已成為原子吸收分析的重要領(lǐng)域之一。利用間接原子吸收法尚可測(cè)定某些非金屬元素。原子吸收分光光度計(jì)安全操作須知：點(diǎn)火前排風(fēng)裝置必須打開(kāi)。工廠原子吸收分光光度計(jì)單價(jià)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="工廠原子吸收分光光度計(jì)單價(jià),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)的基本部件：原子吸收分光光度計(jì)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(cè)裝置）。原子化器主要有兩大類，即火焰原子化器和電熱原子化器?；鹧嬗卸喾N火焰，目前普遍應(yīng)用的是空氣—乙炔火焰。電熱原子化器普遍應(yīng)用的是石墨爐原子化器，因而原子吸收分光光度計(jì)，就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)。前者原子化的溫度在2100℃～2400℃之間，后者在2900℃～3000℃之間。學(xué)校原子吸收分光光度計(jì)性價(jià)比原子吸收分光光度計(jì)根據(jù)物質(zhì)基態(tài)原子蒸汽對(duì)特征輻射吸收的作用來(lái)進(jìn)行金屬元素分析。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="工廠原子吸收分光光度計(jì)單價(jià),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">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(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，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，干擾背景比較嚴(yán)重，一般都需要校正背景。</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(méi)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(lái)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(lái)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。原子吸收分光度計(jì)分析樣品優(yōu)點(diǎn)：準(zhǔn)確度好。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="工廠原子吸收分光光度計(jì)單價(jià),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">火焰中有兩種以上原子的吸收線與光源發(fā)射的剖析線相堆疊時(shí)產(chǎn)生臨近線干擾，這種干擾使結(jié)果偏高。當(dāng)剖析元素的吸收線和共存元素的吸收線完整堆疊，而剖析元素的含量比較低時(shí)，測(cè)得的只是共存元素的吸收信號(hào)。當(dāng)剖析元素的剖析線中心位置和共存元素的吸收線的中心位置稍有偏離，但仍有相當(dāng)水平的堆疊，此時(shí)得于的吸收信號(hào)仍有比較大一局部是共存元素產(chǎn)生的。當(dāng)共存元素的吸收線和剖析元素的吸收線稍有堆疊時(shí)，吸收信號(hào)中仍有小局部是共存元素產(chǎn)生的。只要剖析元素的吸收線和共存元素的吸收線完整別離時(shí)，共存元素才不產(chǎn)生干擾。Co253.649對(duì)Hg253.652r的干擾是典型的吸收線堆疊干擾。原子吸收分光光度計(jì)實(shí)際效果理想的元素*30余個(gè)。元素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)使儀器顯示數(shù)字化、進(jìn)樣自動(dòng)化。工廠原子吸收分光光度計(jì)單價(jià)</p><p style="text-indent:25px">原子吸收分光光度計(jì)根據(jù)物質(zhì)基態(tài)原子蒸汽對(duì)特征輻射吸收的作用來(lái)進(jìn)行金屬元素分析，它能夠靈敏可靠的測(cè)定微量或痕量元素。原子吸收分光光度計(jì)一般由光源（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)四大部分組成。原子吸收分光光度法應(yīng)用也有一定的局限性，即每種待測(cè)元素都要有一個(gè)能發(fā)射特定波長(zhǎng)譜線的光源。原子吸收分析中，首先要使待測(cè)元素呈原子狀態(tài)，而原子化往往是將溶液噴霧到火焰中去實(shí)現(xiàn)，這就存在理化方面的干擾，使對(duì)難溶元素的測(cè)定靈敏度還不夠理想，因此實(shí)際效果理想的元素只30余個(gè)；由于儀器使用中，需用乙炔、氫氣、氬氣、氧化亞氮（俗稱笑氣）等，操作中必須注意安全。工廠原子吸收分光光度計(jì)單價(jià)</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3089137.html</p></div></div></div></div></div><div id="y8wo3jg" class="page-right twoColRt"><div id="c43suw8" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="tfxzl3i" 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" 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