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#f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>高效原子吸收分光光度計(jì)性價(jià)比,原子吸收分光光度計(jì)</p><p><span>***更新：</span>2021-01-27 16:40:55</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="dholiel" 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="qzgnugd" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="cr3mzbi" class="box"><p><p style="text-indent:25px">現(xiàn)在AAS在水質(zhì)中的微量重金屬(As、Hg、Cd、Cr、Cu等)檢測方面十分受用戶的青睞。例如：水中Cu大于1，高效原子吸收分光光度計(jì)性價(jià)比.5mg/L會有苦味;Cu對心病影響很大;水中Cu超標(biāo)會按捺藻類生長，影響水產(chǎn)飼養(yǎng);特別要注意的還有飲用水中的Hg，高效原子吸收分光光度計(jì)性價(jià)比、As等對人類損害特別大，都是致的微量元素。為什么AAS在剖析檢測工作中倍受青睞?一是價(jià)格便宜、性價(jià)比高;二是操作比較簡單;三是靈敏度較高。所以，廣闊科技工作者應(yīng)該重視AAS的應(yīng)用開展情況，高效原子吸收分光光度計(jì)性價(jià)比。許多第三方檢測機(jī)構(gòu)都在很多使用AAS，現(xiàn)在開展很快值得我們高度重視。原子化往往是將溶液噴霧到火焰中去實(shí)現(xiàn)。高效原子吸收分光光度計(jì)性價(jià)比</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高效原子吸收分光光度計(jì)性價(jià)比,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">原子吸收分光光度計(jì)的兩大特色：1.選擇性強(qiáng)。因?yàn)樵游辗止夤舛扔?jì)譜線*發(fā)生在主線系，并且譜線很窄，線重疊幾率較發(fā)射光譜要小得多，所以光譜攪擾較小選擇性強(qiáng)，并且光譜攪擾簡單戰(zhàn)勝。在大多數(shù)情況下，共存元素不對原子吸收分光光度計(jì)剖析發(fā)生攪擾。因?yàn)檫x擇性強(qiáng)，使得剖析精細(xì)快速。即每種待測元素都要有一個(gè)能發(fā)射特定波長譜線的光源。原子吸收分光光度計(jì)剖析中，首要要使待測元素呈原子狀態(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攪擾，使對難溶元素的測定靈敏度還不夠抱負(fù)，因此實(shí)際效果抱負(fù)的元素*30余個(gè)；因?yàn)閮x器運(yùn)用中，需用乙炔、氫氣、氬氣、氧化亞氮等，操作中需要注意。氮?dú)庠游辗止夤舛扔?jì)生產(chǎn)廠家點(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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高效原子吸收分光光度計(jì)性價(jià)比,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)常見的故障解決方法：產(chǎn)生原因：由于經(jīng)常對燃燒器進(jìn)行清洗和調(diào)整，難免使燃燒縫偏離了光軸，致使陰極燈射出的光束不能完全照射到原子蒸汽中去，使檢測靈敏度下降，這種隱蔽性比較強(qiáng)的故障往往被使用者忽略。排除方法：（1）使用銅燈（或其他燈），只通空氣，不點(diǎn)火；邊吸入蒸餾水邊前后調(diào)整燃燒頭的位置，使儀器的透過率較小或背景吸光度較大。這樣做的依據(jù)是：使汽化的樣品密度較大的區(qū)域被調(diào)整到光軸中心，已達(dá)到較佳吸收狀態(tài)。此種方法稱為“冷吸收法”。（2）將儀器自帶或者自制的光軸校準(zhǔn)器具插在燃燒縫中，來校準(zhǔn)燃燒器與光軸的相對位置。注意：有燃燒器前后調(diào)整旋鈕的儀器調(diào)整較為簡便，無此設(shè)備的儀器麻煩一些。</p><p style="text-indent:25px">原子吸收光譜儀又稱原子吸收分光光度計(jì)，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。氣態(tài)的原子能發(fā)射某些特征譜線，也能吸收同樣波長的這些譜線。這是歷史上用原子吸收光譜進(jìn)行定性分析的一例證。很長一段時(shí)間，原子吸收主要局限于天體物理方面的研究，在分析化學(xué)中的應(yīng)用未能引起重視，其主要原因是未找到可產(chǎn)生銳線光譜的光源。直至20世紀(jì)30年代，由于汞的多應(yīng)用，對大氣中微量汞的測定曾利用原子吸收光譜原理設(shè)計(jì)了測汞儀，這是原子吸收在分析中的早應(yīng)用。我國在1963年開始對原子吸收分光光度計(jì)有一般性介紹。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高效原子吸收分光光度計(jì)性價(jià)比,原子吸收分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637419991236161257/4858141.png"></div><p style="text-indent:25px">原子吸收分光度計(jì)分析樣品優(yōu)點(diǎn)：1、抗干擾能力強(qiáng)。從玻爾茲曼方程可知，火焰溫度的波動(dòng)對發(fā)射光譜的譜線強(qiáng)度影響比較大，而對原子吸收分析的影響則要小的多。2、準(zhǔn)確度好?？招娟帢O燈輻射出的特征譜線只被其特定元素所吸收。所以，原子吸收分析的準(zhǔn)確度較高。當(dāng)然，原子吸收光譜分析也存在一些不足之處，原子吸收光譜法的光源是單元素空芯陰極燈，測定一種元素就必須選用該元素的空芯陰極燈，這一原因造成本法不適用于物質(zhì)組成的定性分析，對于難熔元素的測定不能令人滿意。另外原子吸收不能對共振線處于真空紫外區(qū)的元素進(jìn)行直接測定。原子吸收分光光度計(jì)安全操作須知：禁止在儀器附近抽煙或使用明火。高效原子吸收分光光度計(jì)性價(jià)比</p><p style="text-indent:25px">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。高效原子吸收分光光度計(jì)性價(jià)比</p><p style="text-indent:25px">目前原子吸收法已用來測定地質(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。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、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)道近些年來越來越多。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定某些非金屬元素。高效原子吸收分光光度計(jì)性價(jià)比</p></p><br /><p>文章來源地址: 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