可靠紫外可見(jiàn)分光光度計(jì)廠家鑄造輝煌上海儀電分析儀器供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="重要性能指標(biāo)的考察，包括：光度準(zhǔn)確度，雜散光，光譜帶寬，穩(wěn)定性，噪聲，波長(zhǎng)的準(zhǔn)確度和重復(fù)性是幾個(gè)重要指標(biāo)。各指標(biāo)間相互獨(dú)立有相互影響，需要綜合考量選購(gòu)目標(biāo)紫外可見(jiàn)光分光光度計(jì)。使用前，閱讀儀器使用說(shuō)明書和做好儀器使用前的工程師培訓(xùn)。使用過(guò)程"><meta name="keywords" content="可靠紫外可見(jiàn)分光光度計(jì)廠家,紫外可見(jiàn)分光光度計(jì)"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta 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src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593893024301/8360761.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="lr9dzxj" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593893024301/8360761.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="l9rxt9p" 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>可靠紫外可見(jiàn)分光光度計(jì)廠家,紫外可見(jiàn)分光光度計(jì)</p><p><span>***更新：</span>2021-01-12 06:13:47</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="9tx7lz1" 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="zxjlplx" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="tpnznpb" class="box"><p><p> <p> 重要性能指標(biāo)的考察，包括：光度準(zhǔn)確度，雜散光，光譜帶寬，穩(wěn)定性，噪聲，波長(zhǎng)的準(zhǔn)確度和重復(fù)性是幾個(gè)重要指標(biāo)。各指標(biāo)間相互獨(dú)立有相互影響，需要綜合考量選購(gòu)目標(biāo)紫外可見(jiàn)光分光光度計(jì)。 </p> <p> 使用前，閱讀儀器使用說(shuō)明書和做好儀器使用前的工程師培訓(xùn)。使用過(guò)程中，正確操作、認(rèn)真了解儀器指標(biāo)的物理意義和測(cè)試方法以及結(jié)合儀器使用中的相關(guān)設(shè)備的調(diào)試。掌握儀器的基本保養(yǎng)維護(hù)知識(shí)，建立相關(guān)指標(biāo)與分析測(cè)試結(jié)果之間的誤差影響條件，經(jīng)常檢測(cè)和調(diào)試儀器，確保儀器處在合適的工作狀態(tài)。 </p> 綜合評(píng)價(jià)紫外可見(jiàn)光分光光度計(jì)儀器：根據(jù)使用領(lǐng)域進(jìn)行初步篩選，科研、制藥領(lǐng)域注重選擇光譜可調(diào)的紫外可見(jiàn)光分光光度計(jì)，可靠紫外可見(jiàn)分光光度計(jì)廠家。其中，制藥中藥檢儀器要符合藥典規(guī)定，光譜帶寬要求為2nm以下，可靠紫外可見(jiàn)分光光度計(jì)廠家，可靠紫外可見(jiàn)分光光度計(jì)廠家。 </p> <p> <br /> 使用紫外分光光度計(jì)應(yīng)具備四季恒濕的儀器室，配置恒溫設(shè)備，特別是地處南方地區(qū)的實(shí)驗(yàn)室?？煽孔贤饪梢?jiàn)分光光度計(jì)廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="可靠紫外可見(jiàn)分光光度計(jì)廠家,紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593893024301/8360761.png"></div><p> 分光光度計(jì)作為一種精密儀器，在運(yùn)行工作過(guò)程中由于工作環(huán)境、操作方法等種種原因，其技術(shù)狀況必然會(huì)發(fā)生某些變化，可能影響設(shè)備的性能，甚至誘發(fā)設(shè)備故障及事故。因此，分析工作者必須了解分光光度計(jì)的基本原理和使用說(shuō)明，并能及時(shí)發(fā)現(xiàn)和排除這些隱患，對(duì)已產(chǎn)生的故障及時(shí)維修才能保證儀器設(shè)備的正常運(yùn)行。 </p> <p> 紫外可見(jiàn)分光光度計(jì)--使用經(jīng)驗(yàn) </p> <p> 若大幅度改變測(cè)試波長(zhǎng)，需稍等片刻，等燈熱平衡后，重新校正“0”和“100%”然后再測(cè)量。 </p> <p> 指針式儀器在未接通電源時(shí)，電表的指針必須位于零刻度上。若不是這種情況，需進(jìn)行機(jī)械調(diào)零。 </p> <p> 比色皿使用完畢后，請(qǐng)立即用蒸餾水沖洗干凈，并用干凈柔軟的紗布將水跡擦去，以防止表面光潔度被破壞，影響比色皿的透光率。 </p> <p> 操作人員不應(yīng)輕易動(dòng)燈泡及反光鏡燈，以免影響光效率。 </p> <p> 1900型等分光光度計(jì)，由于其光電接收裝置為光電倍增管，它本身的特點(diǎn)是放大倍數(shù)大，因而可以用于檢測(cè)微弱光電信號(hào)，而不能用來(lái)檢測(cè)強(qiáng)光。否則容易產(chǎn)生信號(hào)漂移，靈敏度下降。 </p> <p> 針對(duì)其上述特點(diǎn)，在維修、使用此類儀器時(shí)應(yīng)注意不讓光電倍增管長(zhǎng)時(shí)間暴露于光下，因此在預(yù)熱時(shí)，應(yīng)打開比色皿蓋或使用擋光桿，避免長(zhǎng)時(shí)間照射使其性能漂移而導(dǎo)致工作不穩(wěn)。中國(guó)**紫外可見(jiàn)分光光度計(jì)多少錢波長(zhǎng)范圍越寬的價(jià)格越貴;波長(zhǎng)準(zhǔn)確度及雜散光參數(shù)的數(shù)值越低，表示性能越好。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="可靠紫外可見(jiàn)分光光度計(jì)廠家,紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593091764635/4502162.png"></div><p> 分光光度計(jì)是杜包斯克(Duboscq)和奈斯勒(Nessler)等人在1854年將朗伯-比爾(Lambert-Beer)定律應(yīng)用于定量分析化學(xué)領(lǐng)域，并且設(shè)計(jì)了第1臺(tái)比色計(jì)。到1918年，美國(guó)國(guó)家標(biāo)準(zhǔn)局制成了第1臺(tái)紫外可見(jiàn)分光光度計(jì)。此后，紫外可見(jiàn)分光光度計(jì)經(jīng)不斷改進(jìn)，又出現(xiàn)自動(dòng)記錄、自動(dòng)打印、數(shù)字顯示、微機(jī)控制等各種類型的儀器，使光度法的靈敏度和準(zhǔn)確度也不斷提高，其應(yīng)用范圍也不斷擴(kuò)大。紫外可見(jiàn)分光光度法從問(wèn)世以來(lái)，在應(yīng)用方面有了很大的發(fā)展，尤其是在相關(guān)學(xué)科發(fā)展的基礎(chǔ)上，促使分光光度計(jì)儀器的不斷創(chuàng)新，功能更加齊全，使得光度法的應(yīng)用更拓寬了范圍。目前，分光光度法已為工農(nóng)業(yè)各個(gè)部門和科學(xué)研究的各個(gè)領(lǐng)域所采用，成為人們從事生產(chǎn)和科研的有力測(cè)試手段。目前市場(chǎng)上有兩類主流產(chǎn)品:掃描光柵式分光光度計(jì)和固定光柵式分光光度計(jì)。 </p> <p> 什么是紫外可見(jiàn)分光光度計(jì)？紫外可見(jiàn)分光光度計(jì)是一類很重要的分析儀器，無(wú)論在物理學(xué)、化學(xué)、生物學(xué)、醫(yī)學(xué)、材料學(xué)、環(huán)境科學(xué)等科學(xué)研究領(lǐng)域，還是在化工、醫(yī)藥、環(huán)境檢測(cè)、冶金等現(xiàn)代化生產(chǎn)與管理部門，紫外可見(jiàn)分光光度計(jì)都有重要的應(yīng)用。 </p><p> 棱鏡單色器是利用不同波長(zhǎng)的光在棱鏡內(nèi)折射率不同將復(fù)合光色散為單色光，這種現(xiàn)象稱為棱鏡的色散作用。常用的棱鏡由玻璃或石英制成。可見(jiàn)光范圍常采用玻璃棱鏡，其色散力強(qiáng)，價(jià)格低廉，但是玻璃吸收紫外光，所以不宜用于紫外光區(qū)。紫外光范圍常用石英作為材料，石英棱鏡的工作波長(zhǎng)范圍為185~4000nm，在紫外光區(qū)有較好的分辨力，而且也適用于可見(jiàn)光區(qū)和近紅外光區(qū)。棱鏡單色器的特點(diǎn)是波長(zhǎng)越短，色散程度越好。越趨向長(zhǎng)波，色散程度越差，所以，單色器用棱鏡的分光光度計(jì)，其波長(zhǎng)刻度在紫外光區(qū)可達(dá)到0.2nm，而在長(zhǎng)波段，只能達(dá)到5nm。紫外分光光度計(jì)的單色器是將光源發(fā)出的連續(xù)光譜分解成單色光，并能準(zhǔn)確方便地“取出”所需要的某一波長(zhǎng)的光的光學(xué)裝置，它是光度計(jì)的心臟。單色器主要由狹縫、色散元件和透鏡系統(tǒng)組成。其中色散元件是單色器的主要部件。常用的色散元件是棱鏡、光柵，或者是兩者的組合。 </p> <p> <br /> 分光光度計(jì)元器件方面，經(jīng)歷了棱鏡、機(jī)刻光柵和全息光柵，商品化的全息閃耀光柵已迅速取代一般刻劃光柵。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="可靠紫外可見(jiàn)分光光度計(jì)廠家,紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593980700101/5381945.png"></div><p> 紫外可見(jiàn)分光光度計(jì)條件設(shè)定 <p> 可通過(guò)控制被測(cè)物濃度或改變吸收池厚度來(lái)實(shí)現(xiàn)吸光度合理的范圍，以盡量減小測(cè)量誤差。一般吸光度盡量控制在0.1-0.8范圍。 </p> <p> 空白溶液是用來(lái)調(diào)節(jié)吸光度測(cè)量工作零點(diǎn)即A=0，T=100%的溶液，以消除溶液中其它基體組分以及吸收池和溶劑對(duì)入射光的反射和吸收所帶來(lái)的誤差。根據(jù)情況不同，常用空白溶液有如下幾種選擇。 </p> </p> <p> 在定量分析中，為了提高測(cè)定的靈敏度，入射光的波長(zhǎng)應(yīng)選擇被測(cè)物的MAX吸收波長(zhǎng)λmax，如果λmax有干擾，可選擇另一條靈敏度稍低、但能避免干擾的譜線，所以，適當(dāng)選擇入射光的波長(zhǎng)，不僅能提高測(cè)定的靈敏度，還能提高測(cè)定的準(zhǔn)確度。 </p> <p> 狹縫寬度過(guò)大，入射光的單色性差；狹縫寬度太小，入射光的強(qiáng)減弱。狹縫寬度過(guò)大或過(guò)小均會(huì)造成靈敏度降低，選擇是產(chǎn)生MIN誤差情下的MAX狹縫。一般選用儀器的狹縫寬琶度應(yīng)小于待測(cè)樣品吸收帶的半寬度，否則測(cè)得的吸光度值會(huì)偏低，狹縫寬度的選擇應(yīng)以減少狹縫寬度時(shí)供試品的吸光度不再；加為準(zhǔn)，對(duì)于大部分被測(cè)品種，可以使用2nm縫寬。 </p> <p> <br /> </p> <p> <br /> 紫外分光光度計(jì)可用于藥品的鑒別、純度檢查及含量測(cè)定，既可以定性分析，又可以定量分析。可靠紫外可見(jiàn)分光光度計(jì)廠家</p><p style="text-indent:25px">在大部分的樣品類型中，分光光度計(jì)可接受樣品孔、小玻璃管cuvette、吸漿管和微孔板。可靠紫外可見(jiàn)分光光度計(jì)廠家</p><p> <p> 環(huán)境中的塵埃和腐蝕性氣體亦可以影響機(jī)械系統(tǒng)的靈活性、降低各種限位開關(guān)、按鍵、光電偶合器的可靠性，也是造成必須學(xué)部件鋁膜銹蝕的原因之一： </p> <p> 紫外分光光度計(jì)儀器使用一定周期后，內(nèi)部會(huì)積累一定量的塵埃，由維修工程師或在工程師指導(dǎo)下定期開啟儀器外罩對(duì)內(nèi)部進(jìn)行除塵工作： </p> <p> 將各發(fā)熱元件的散熱器重新緊固，對(duì)光學(xué)盒的密封窗口進(jìn)行清潔，必要時(shí)對(duì)光路進(jìn)行校準(zhǔn)，對(duì)機(jī)械部分進(jìn)行清潔和必要的潤(rùn)滑?；謴?fù)原狀，再進(jìn)行一些必要的檢測(cè)、調(diào)校與記錄。分析儀器工作者要懂得儀器的日常維護(hù)和對(duì)主要技術(shù)指標(biāo)的簡(jiǎn)易測(cè)試方法，自己經(jīng)常對(duì)儀器進(jìn)行維護(hù)和測(cè)試，以保證儀器工作在良好狀態(tài)。 </p> 紫外分光光度法是根據(jù)物質(zhì)的吸收光譜，來(lái)研究物質(zhì)的成分、結(jié)構(gòu)和物質(zhì)間相互作用的有效手段。紫外分光光度計(jì)可以在紫外可見(jiàn)光區(qū)任意選擇不同波長(zhǎng)的光。物質(zhì)的吸收光譜就是物質(zhì)中的分子和原子吸收了入射光中的某些特定波長(zhǎng)的光能量，相應(yīng)地發(fā)生了分子振動(dòng)能級(jí)躍遷和電子能級(jí)躍遷的結(jié)果。 </p> <p> <br /> 可靠紫外可見(jiàn)分光光度計(jì)廠家</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(jì)，氣相色譜，原子吸收，食品安全。儀電分析致力于把技術(shù)上的創(chuàng)新展現(xiàn)成對(duì)用戶產(chǎn)品上的貼心，為用戶帶來(lái)良好體驗(yàn)。儀電分析始終關(guān)注儀器儀表行業(yè)。滿足市場(chǎng)需求，提高產(chǎn)品價(jià)值，是我們前行的力量。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2811564.html</p></div></div></div></div></div><div id="91blpnn" class="page-right twoColRt"><div 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