化工紫外可見分光光度計(jì) 真誠推薦上海儀電分析儀器供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="紫外可見分光光度計(jì)的展望紫外可見分光光度計(jì)雖然是一類有著很長歷史的分析儀器，但每一次吸收了新的技術(shù)成果都使它煥發(fā)出新的活力。掃描光柵型分光光度計(jì)依托成熟的設(shè)計(jì)制造工藝，并結(jié)合計(jì)算機(jī)控制等新的技術(shù)成果，仍有很強(qiáng)的生命力。在很多方面，掃描型產(chǎn)品"><meta name="keywords" content="化工紫外可見分光光度計(jì),紫外可見分光光度計(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 name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta 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class="leftbox clearfix"><h1>化工紫外可見分光光度計(jì) 真誠推薦上海儀電分析儀器供應(yīng)</h1><div id="3gx2yeg" class="proBig"><div id="zjw8sdv" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="wlnf8dh" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="h7h7ykh" 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>化工紫外可見分光光度計(jì),紫外可見分光光度計(jì)</p><p><span>***更新：</span>2020-11-13 08:24:26</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="aumebs2" 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="txz3acz" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="ds3oiuw" class="box"><p><p style="text-indent:25px">紫外可見分光光度計(jì)的展望紫外可見分光光度計(jì)雖然是一類有著很長歷史的分析儀器，但每一次吸收了新的技術(shù)成果都使它煥發(fā)出新的活力。掃描光柵型分光光度計(jì)依托成熟的設(shè)計(jì)制造工藝，并結(jié)合計(jì)算機(jī)控制等新的技術(shù)成果，仍有很強(qiáng)的生命力。在很多方面，掃描型產(chǎn)品仍體現(xiàn)了技術(shù)水平。陣列式探測器的產(chǎn)生直接促成了固定光柵分光光度計(jì)的設(shè)計(jì)，使得它在測量地更快、更穩(wěn)定、適應(yīng)性更強(qiáng)的方向邁出了一大步。并且，從今后的發(fā)展來看，儀器的小型化、在線化，測量的現(xiàn)場化，化工紫外可見分光光度計(jì)、實(shí)時化將是一大方向。要使分光光度計(jì)走出實(shí)驗(yàn)室，成為一種應(yīng)用更廣，更為普及的測量分析設(shè)備，陣列式探測器以及其它的固態(tài)式設(shè)計(jì)可發(fā)揮重要的作用。光纖也將是其中的一項(xiàng)重要技術(shù)，它已使得紫外可見分光光度計(jì)的使用變得更方便，化工紫外可見分光光度計(jì)，化工紫外可見分光光度計(jì)，同時也使分光光度計(jì)的配置變得更靈活。光纖結(jié)合模塊化設(shè)計(jì)，可能使得分光光度計(jì)可以突破完全固定、靜態(tài)的組成，而變成可以自由搭配，自助式構(gòu)建的儀器。光纖同時也是實(shí)現(xiàn)在線測量的重要手段。計(jì)算機(jī)技術(shù)的影響將更為增進(jìn)。分光光度計(jì)的自動化、智能化是一個方面。另一方面，軟件已經(jīng)在一定程度上使實(shí)在的儀器接近了虛擬的程序，網(wǎng)絡(luò)和信息技術(shù)的結(jié)合可能帶來進(jìn)一步的影響。通常我們所理解的單色光，只是存于理想狀態(tài)下，實(shí)際上得到的“單色光”，是帶有一定寬度和波長范圍的譜帶。化工紫外可見分光光度計(jì)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="化工紫外可見分光光度計(jì),紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png"></div><p> 掌握紫外可見光分光光度計(jì)基本工作原理：一定頻率紫外可見光照射所需要分析的目標(biāo)樣品，引起目標(biāo)樣品中價電子發(fā)生躍遷，從而變現(xiàn)隨著吸收波長變化而引起光譜變化，形成可供分析數(shù)據(jù)。 </p> <p> 以朗伯-比耳定律(Lambert-beer)為理論基礎(chǔ)，特定波長吸收中，吸收程度正比于試樣成分濃度，因此，可進(jìn)行光譜的定性分析。且根據(jù)吸收與已知濃度標(biāo)樣比較，能進(jìn)行定量分析。 </p> <p> 紫外可見光分光光度計(jì)種類及優(yōu)缺點(diǎn)對比：傳統(tǒng)機(jī)型：單光束UV、全程密閉、以光柵進(jìn)行分光，標(biāo)樣和測試樣品分別測試，全波段掃描時間至多2min；比例雙光束UV：單光束UV，全程密閉、經(jīng)光柵再經(jīng)棱鏡，全程密閉、標(biāo)樣和測試樣品分別測試、測試靈敏度降低，全波段分析時間長。工廠紫外可見分光光度計(jì)對比目前市場上有兩類主流紫外分光光度計(jì)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><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="化工紫外可見分光光度計(jì),紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593808795839/2949755.png"></div><p style="text-indent:25px"><p>紫外可見分光光度計(jì)定量、定性分析需注意的問題<p>重復(fù)測定次數(shù)和波長掃描速度：對吸光度不是很大的樣品，或者狹縫不是很小，這是檢測器檢測的光信號的強(qiáng)度是比較大的，重復(fù)性較好，可選擇較少的重復(fù)次數(shù)。相反，如果樣品吸光度很大，狹縫很小，選擇較大的重復(fù)次數(shù)可獲得更好的結(jié)果。5測定波長間隔：在掃描光譜時需要選擇，可根據(jù)樣品吸收峰的寬度進(jìn)行選擇，峰寬較大時，可選擇較大的波長間隔。反之亦反。通常每個正常的吸收峰應(yīng)該用不少于30個數(shù)據(jù)點(diǎn)表示出來。</p><p> 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> 棱鏡單色器是利用不同波長的光在棱鏡內(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?？梢姽夥秶２捎貌ＡЮ忡R，其色散力強(qiáng)，價格低廉，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，而且也適用于可見光區(qū)和近紅外光區(qū)。棱鏡單色器的特點(diǎn)是波長越短，色散程度越好。越趨向長波，色散程度越差，所以，單色器用棱鏡的分光光度計(jì)，其波長刻度在紫外光區(qū)可達(dá)到0.2nm，而在長波段，只能達(dá)到5nm。一般來說，紫外光分光光度計(jì)分為單光束和雙光束兩類。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="化工紫外可見分光光度計(jì),紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png"></div><p> 色譜技術(shù)比它起步晚了二百多年，但如今的色譜儀器（氣相、液相、氣質(zhì)、液質(zhì)）占了分析界的大半壁江山。相較璀璨如星的各類的色譜儀器，紫外-可見分光光度計(jì)黯然了很多。 </p> <p> 紫外-可見分光光度計(jì)可以被更精確更高級的檢測手段所取代？可以退出“分析史”的舞臺？ </p> <p> NO！NO！NO！ </p> <p> 事實(shí)上紫外-可見分光光度計(jì)（下文簡稱紫外分光光度計(jì)），依然是“分析舞臺”的美玉，低調(diào)有內(nèi)涵，親民有價值。一起來發(fā)現(xiàn)它在日化產(chǎn)品分析中的美和價值吧。原理分子的紫外可見吸收光譜是由于分子中的某些基團(tuán)吸收了紫外可見輻射光后，發(fā)生了電子能級躍遷而產(chǎn)生的吸收光譜。由于各種物質(zhì)具有各自不同的分子、原子和分子空間結(jié)構(gòu)，其吸收光能量的情況也就不會相同，因此，每種物質(zhì)都有其特有的、固定的吸收光譜曲線，可根據(jù)吸收光譜上某些特征波長處吸光度的高低判別或測定該物質(zhì)的含量，這就是分光光度定性和定量分析的基礎(chǔ)。現(xiàn)在的許多紫外分光光度計(jì)裝的是“長壽”型燈源，據(jù)說氘燈可達(dá)2000小時，鎢燈3000小時。民用紫外可見分光光度計(jì)選擇</p><p style="text-indent:25px">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?；ぷ贤饪梢姺止夤舛扔?jì)</p><p> 眾所周知，紫外可見分光光度計(jì)的光源部需要經(jīng)常更換光源燈（鎢燈或氘燈），一般來說這種工作均由儀器廠家的工程師來進(jìn)行；如果儀器用戶自己可以掌握這種更換和調(diào)整技術(shù)，既能節(jié)約等待時間又能節(jié)省維修費(fèi)用，可謂一舉兩得。 </p> <p> 雖然有些用戶也曾經(jīng)自行嘗試過這種工作，但往往效果不太理想，究其原因則是沒有掌握要領(lǐng)，他們將這種更換光源燈的工作看做與更換室內(nèi)照明燈泡的性質(zhì)一樣，認(rèn)為只要換上的光源燈被亮即萬事大吉；為此，我談?wù)勥@方面的調(diào)整要領(lǐng)。 </p> <p> 一般簡易型分光光度計(jì)的光源室**設(shè)計(jì)了一支鎢燈來涵蓋整個波長區(qū)域的使用，由于鎢燈的能量在紫外區(qū)很弱，因此、此類儀器在紫外區(qū)的測量信號的噪聲較大。 </p> <p> 當(dāng)然、也有**的紫外分光光度計(jì)，同理、光源燈就改用一支氘燈了。 </p> <p> <br /> </p> <p> 為了保障在190～1100nm區(qū)域內(nèi)的高信噪比，目前的儀器均采用兩只光源燈互補(bǔ)使用，即在紫外區(qū)采用氘燈，而在可見區(qū)使用鎢燈，兩只燈的選擇采用旋轉(zhuǎn)光源鏡來切換。化工紫外可見分光光度計(jì)</p><p style="text-indent:25px">上海儀電分析儀器有限公司位于徐塘路88號7幢4層、9幢，是一家專業(yè)的儀器儀表、電子元器件及相關(guān)的系統(tǒng)集成的生產(chǎn)、服務(wù)及銷售，計(jì)算機(jī)軟件開發(fā)及銷售，從事貨物進(jìn)出口及技術(shù)進(jìn)出口業(yè)務(wù)?！疽婪毥?jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營活動】儀器儀表、電子元器件及相關(guān)的系統(tǒng)集成的生產(chǎn)、服務(wù)及銷售，計(jì)算機(jī)軟件開發(fā)及銷售，從事貨物進(jìn)出口及技術(shù)進(jìn)出口業(yè)務(wù)?！疽婪毥?jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營活動】公司。專業(yè)的團(tuán)隊(duì)大多數(shù)員工都有多年工作經(jīng)驗(yàn)，熟悉行業(yè)專業(yè)知識技能，致力于發(fā)展儀電分析,上分的品牌。公司以用心服務(wù)為重點(diǎn)價值，希望通過我們的專業(yè)水平和不懈努力，將儀器儀表、電子元器件及相關(guān)的系統(tǒng)集成的生產(chǎn)、服務(wù)及銷售，計(jì)算機(jī)軟件開發(fā)及銷售，從事貨物進(jìn)出口及技術(shù)進(jìn)出口業(yè)務(wù)。【依法須經(jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營活動】儀器儀表、電子元器件及相關(guān)的系統(tǒng)集成的生產(chǎn)、服務(wù)及銷售，計(jì)算機(jī)軟件開發(fā)及銷售，從事貨物進(jìn)出口及技術(shù)進(jìn)出口業(yè)務(wù)?！疽婪毥?jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營活動】等業(yè)務(wù)進(jìn)行到底。儀電分析始終以質(zhì)量為發(fā)展，把顧客的滿意作為公司發(fā)展的動力，致力于為顧客帶來***的分光光度計(jì)，氣相色譜，原子吸收，食品安全。</p></p><br 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