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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>三用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>2021-02-03 05:20:54</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="vkcz2ih" 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="dspwq8u" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="29kmo7y" class="box"><p><p style="text-indent:25px">原子吸收分光光度計(jì)作用：原子吸收分光光度計(jì)的作用是進(jìn)樣器把溶液中的金屬離子提升到原子化器，用原子化器（石墨爐原子化器或者火焰原子化器）把液體通過(guò)高溫的方式轉(zhuǎn)化為氣態(tài)原子蒸汽，由于元素不同，導(dǎo)致特征譜線不同，不同的原子會(huì)吸收其特征波長(zhǎng)的光子。這時(shí)候從光源（空心陰極燈）發(fā)出來(lái)的特征譜線通過(guò)原子蒸汽被吸收一部分，三用原子吸收分光光度計(jì)單價(jià)，比較原始光強(qiáng)（I0）和吸收后的光強(qiáng)(I)，三用原子吸收分光光度計(jì)單價(jià)，用比爾定律得出吸收比率，三用原子吸收分光光度計(jì)單價(jià)，進(jìn)而用標(biāo)準(zhǔn)曲線法或者標(biāo)準(zhǔn)加入法計(jì)算濃度。原子吸收分光光度計(jì)原子化條件：燃燒器的高度選擇。三用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="三用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/ydfx123/637419991291551872/1267970.png"></div><p style="text-indent:25px">火焰原子吸收光譜儀使用光源大都是空心陰極燈，空心陰極燈的燈電流大小決定著燈輻射強(qiáng)度。在一定范圍內(nèi)增大燈電流可以增大輻射強(qiáng)度，同時(shí)噪音也增大，但是儀器靈敏度降低。如果燈電流過(guò)大，會(huì)導(dǎo)致燈本身發(fā)生自蝕現(xiàn)象而縮短燈使用壽命;會(huì)放電不正常。相反，在一定范圍內(nèi)降低燈電流可以降低輻射強(qiáng)度，儀器靈敏度提高，但燈穩(wěn)定性和信噪比下降。因此，在具體檢測(cè)工作中，如被測(cè)樣濃度高時(shí)，則使用較大燈電流，以獲得較好穩(wěn)定性;如被測(cè)樣濃度低時(shí)，則在保證穩(wěn)定性滿足要求的前提下，使用較低的燈電流，以獲得較好的靈敏度。空氣原子吸收分光光度計(jì)代理點(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="三用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/ydfx123/637419991252020619/9480950.png"></div><p style="text-indent:25px">原子吸收分光光度計(jì)安全操作須知：一.操作人員必須經(jīng)過(guò)儀器生產(chǎn)商的操作培訓(xùn)或持有更高級(jí)別職業(yè)資格證書(shū)；二.儀器室內(nèi)不得使用或存放其他無(wú)關(guān)的易燃、易爆等危險(xiǎn)品；三.禁止在儀器附近抽煙或使用明火；四.儀器使用前，操作人員應(yīng)對(duì)儀器進(jìn)行安全檢查并填寫(xiě)《TAS系列原子吸收分光光度計(jì)安全檢查記錄卡》；五.點(diǎn)火前排風(fēng)裝置必須打開(kāi)；六.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；七.儀器使用完畢后，先關(guān)閉乙炔鋼瓶總開(kāi)關(guān)，待火焰自動(dòng)熄滅后，再關(guān)閉空壓機(jī)；八.為了防止乙炔鋼瓶總開(kāi)關(guān)泄露，所有工作結(jié)束后，應(yīng)再次確認(rèn)乙炔各壓力表指針歸零。</p><p style="text-indent:25px">原子吸收分光光度計(jì)工作原理：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(duì)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)度與試液中被測(cè)元素的含量成正比。其定量關(guān)系可用郎伯-比耳定律，A=-lgI/Io=-lgT=KCL，式中I為透射光強(qiáng)度；I0為發(fā)射光強(qiáng)度；T為透射比；L為光通過(guò)原子化器光程(長(zhǎng)度)，每臺(tái)儀器的L值是固定的；C是被測(cè)樣品濃度；所以A=KC。利用待測(cè)元素的共振輻射，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)。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)操作中必須注意安全。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="三用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/ydfx123/637419988150712025/4463747.png"></div><p style="text-indent:25px">石墨爐原子吸收分光光度計(jì)影響火焰原子吸收光譜儀靈敏度的因素有?1、霧化器：霧化器作用是將試液霧化。它是原子吸收光譜儀重要部件，其性能對(duì)測(cè)定靈敏度、精密度和化學(xué)物理干擾等產(chǎn)生明顯影響。霧化器噴霧越穩(wěn)定，霧滴越微小均勻，霧化效率也就越高，相應(yīng)靈敏度越高，精密度越好，化學(xué)物理干擾越小。霧化器調(diào)節(jié)目前都是通過(guò)人工調(diào)節(jié)撞擊球和毛細(xì)管之間相對(duì)位置來(lái)實(shí)現(xiàn)。石墨爐原子吸收分光光度計(jì)檢測(cè)人員應(yīng)將霧化器調(diào)節(jié)到霧滴細(xì)小而均勻，較好是霧滴在撞擊球周?chē)鶆蚍植肌?、試液提升量：提升量大小影響到靈敏度高低。過(guò)高或過(guò)低的提升量會(huì)使霧化器霧化不穩(wěn)定。每個(gè)廠家儀器提升量范圍各不相同，各自有一定變化范圍。增大提升量辦法有：(1)增大助燃?xì)饬髁浚@樣增大負(fù)壓使提升量增大。(2)縮短進(jìn)樣管長(zhǎng)度，縮短進(jìn)樣管長(zhǎng)度使管阻力減小，使試液流量增大。相反，如想降低提升量，則可以減小助燃?xì)饬髁炕蚣娱L(zhǎng)進(jìn)樣管長(zhǎng)度。火焰原子吸收分光光度計(jì)缺點(diǎn)是：原子化效率低，靈敏度不夠高。工業(yè)原子吸收分光光度計(jì)對(duì)比</p><p style="text-indent:25px">原子吸收分光光度計(jì)的實(shí)際應(yīng)用：有機(jī)物分析中的應(yīng)用。三用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)按光束形成可分為單光束（指從光源中發(fā)出的光只以單一光束的形式通過(guò)原子化器、單色器和檢測(cè)系統(tǒng)）和雙光束（指從光源發(fā)出的光被切光器分成兩束強(qiáng)度相等的光，一束為樣品光束通過(guò)原子化器被基態(tài)原子部分吸收；另一束只作為參比光束，不通過(guò)原子化器，其光強(qiáng)度不被減弱）兩類(lèi)；按包含“單獨(dú)”的分光系統(tǒng)和檢測(cè)系統(tǒng)的數(shù)目又可分為單道（指儀器只有一個(gè)光源，一個(gè)單色器，一個(gè)顯示系統(tǒng)，每次只能測(cè)一種元素）、雙道（指儀器有兩個(gè)不同光源，兩個(gè)單色器兩個(gè)檢測(cè)顯示系統(tǒng)）和多道。目前普遍使用的是單道單光束或單道雙光束原子吸收分光光度計(jì)。原子吸收分光光度計(jì)型號(hào)繁多，不同型號(hào)儀器性能和應(yīng)用范圍不同。三用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/3135462.html</p></div></div></div></div></div><div id="oipr7ip" class="page-right twoColRt"><div id="kzb7rov" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="8hdpryp" 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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