低端紫外可見分光光度計(jì)銷售廠家誠信互利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="雙光束UV：經(jīng)棱鏡分光后通過光柵，加強(qiáng)了靈敏度，同時(shí)測量空白樣品與目標(biāo)樣品的優(yōu)點(diǎn)，全波段分析時(shí)間長。全波段UV：樣品與空白樣品可以暴露在空氣中，照射樣品后，進(jìn)入密閉箱，通過光柵，進(jìn)入DAD檢測器檢測。檢測樣品不需要密閉，外界光線對測試無影響"><meta name="keywords" content="低端紫外可見分光光度計(jì)銷售廠家,紫外可見分光光度計(jì)"><link rel="canonical" href="http://m.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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href="http://m.cdcfah.com/">首頁?<a href="http://m.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://m.cdcfah.com/cp/first-_yiqiyibiao/">儀器儀表</a>?<a href="http://m.cdcfah.com/cp/second-yiqiyibiao_gxyq/">光學(xué)儀器</a>?<a href="http://m.cdcfah.com/cp/third-gxyq_gpygdj/">光譜儀、光度計(jì)</a>?低端紫外可見分光光度計(jì)銷售廠家誠信互利上海儀電分析儀器供應(yīng)</p><div id="nwtacel" class="leftbox clearfix"><h1>低端紫外可見分光光度計(jì)銷售廠家誠信互利上海儀電分析儀器供應(yīng)</h1><div id="f7qheqn" class="proBig"><div id="hgdfxj2" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594919157259/9098588.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="mumov87" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594919157259/9098588.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ospwtf2" 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>低端紫外可見分光光度計(jì)銷售廠家,紫外可見分光光度計(jì)</p><p><span>***更新：</span>2020-11-02 00:31:41</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="ocjqi3b" 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="qphegnp" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="3vnkroa" class="box"><p><p> 雙光束UV：經(jīng)棱鏡分光后通過光柵，加強(qiáng)了靈敏度，同時(shí)測量空白樣品與目標(biāo)樣品的優(yōu)點(diǎn)，全波段分析時(shí)間長。全波段UV：樣品與空白樣品可以暴露在空氣中，照射樣品后，進(jìn)入密閉箱，通過光柵，進(jìn)入DAD檢測器檢測。檢測樣品不需要密閉，外界光線對測試無影響，使用方便準(zhǔn)確且空白只需要檢測一次，全波段分析時(shí)間小于1s。 </p> <p> 紫外可見光分光光度計(jì)的體積大小以及外觀美學(xué)性。紫外可見分光光度計(jì)的儀器體積大小，會牽扯儀器所需要的擺放位置以及儀器使用的方便程度。 </p> <p> 儀器的外形美觀，給人以大氣、上檔次、舒適、新鮮的感覺。首先，會讓使用儀器者對儀器分外的愛護(hù)、維護(hù)和保養(yǎng)，有利于延長儀器的使用壽命。同時(shí)，也會讓儀器使用者的工作環(huán)境更舒適、優(yōu)美，也有利于提高工作效率。 </p> <p> 紫外可見光分光光度計(jì)儀器使用范圍。紫外可見光分光光度的使用范圍是有儀器的性能指標(biāo)所決定。采購紫外可見光分光光度計(jì)根據(jù)測試樣品的具體要求，參考儀器的使用范圍，滿足即可，低端紫外可見分光光度計(jì)銷售廠家，不必苛求，低端紫外可見分光光度計(jì)銷售廠家。當(dāng)然，土豪可以忽略，低端紫外可見分光光度計(jì)銷售廠家。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。低端紫外可見分光光度計(jì)銷售廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="低端紫外可見分光光度計(jì)銷售廠家,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594919157259/9098588.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(jià)值。一起來發(fā)現(xiàn)它在日化產(chǎn)品分析中的美和價(jià)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)。中端紫外可見分光光度計(jì)賣價(jià)紫外可見光的范圍內(nèi)，對于一個(gè)特定的波長，吸收的程度正比于試樣中該成分的濃度，可以進(jìn)行定性分析。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="低端紫外可見分光光度計(jì)銷售廠家,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">紫外分光光度計(jì)檢測器是將光信號轉(zhuǎn)變?yōu)殡娦盘柕难b置。測量吸光度時(shí)，并非直接測量透過吸收池的光強(qiáng)度，而是將光強(qiáng)度轉(zhuǎn)換成電流進(jìn)行測量，這種光電轉(zhuǎn)換器件稱為檢測器，又叫接受器。常用的檢測器有光電池、光電管、光電倍增管及光電二極管陣列檢測器等。光電池價(jià)格便宜，但長時(shí)間曝光，會使靈敏度降低。光電管的靈敏度比光電池高；光電倍增管不僅靈敏度比普通光電管高，而且響應(yīng)速度快，目前中、高性能分光光度計(jì)中一般采用它作為檢測器。光電二極管陣列檢測器是紫外可見分光光度計(jì)檢測的一個(gè)重要進(jìn)展。</p><p> 定性定量。利用特定的吸收峰，快速對待測樣品進(jìn)行定性和定量分析。如聚六亞甲基雙胍鹽酸鹽的檢測。利用雙波長，以很快的速度辨別是單胍還是雙胍，并進(jìn)行粗略定量。這是液相色譜無論如何也做不到的。 </p> <p> 測定透過率。透光率是一個(gè)物理詞匯，是表示光線透過介質(zhì)的的能力，是透過透明或半透明物體的光通量與其入射光通量的百分率。吸光度與透過率的換算公式 </p> <p> 透過率對于某些原料檢測是非常實(shí)用的，可對此類原料品質(zhì)進(jìn)行總體把控。 </p> <p> 雜質(zhì)的檢測。通過前處理將雜質(zhì)與主成分分離后，進(jìn)行紫外分光光度測定，可很快得到該雜質(zhì)的含量。以桑普實(shí)驗(yàn)室這十幾年對苯氧乙醇中雜質(zhì)苯酚的測定方法改進(jìn)過程為例： </p> <p> 之后建立了4-氨基安替比林比色法，可實(shí)現(xiàn)對苯氧乙醇含量20、40、60、80、100ppm的區(qū)分；紫外分光光度法 </p> <p> 期間同時(shí)采用EP中紫外分光光度法，并將其進(jìn)行適當(dāng)改進(jìn)，作為修訂后的企標(biāo)。該方法便利快速，可實(shí)現(xiàn)50ppm以上的定量檢測。HPLC-DAD </p> <p> 近兩年，桑普對產(chǎn)品品質(zhì)把控更嚴(yán)格，希望能實(shí)現(xiàn)幾個(gè)ppm的定量檢測。所以采用了HPLC-DAD作為企標(biāo)對其檢測。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-比爾定律應(yīng)用于定量分析化學(xué)領(lǐng)域。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="低端紫外可見分光光度計(jì)銷售廠家,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592124342670/5540999.png"></div><p> 紫外可見分光光度計(jì)是一類很重要的實(shí)驗(yàn)室分析儀器，無論在物理學(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、冶金等現(xiàn)代化生產(chǎn)與管理部門，紫外可見分光光度計(jì)都有面向廣的應(yīng)用。 </p> <p> 紫外可見分光光度計(jì)校正 </p> <p> 開機(jī)預(yù)熱10分鐘足矣； </p> <p> 放入黑塊和標(biāo)樣（沒有的自己配），關(guān)閉蓋子； </p> <p> 校0； </p> <p> 把燈光對著黑塊，把透光度調(diào)0； </p> <p> 把燈光對標(biāo)樣，將吸光度調(diào)到100%。 </p> <p> 紫外可見分光光度計(jì)使用注意事項(xiàng) </p> <p> 開機(jī)前應(yīng)先預(yù)熱15分鐘，然后開機(jī)自檢； </p> <p> 濕度要控制在75%左右，溫度在5～30度之間； </p> <p> 儀器要穩(wěn)壓電源，接地要好。并且避免陽光直接照射。因?yàn)樵黾恿藴y量的速度，所以雙光束分光光度計(jì)在測量一些溶液隨時(shí)間動態(tài)變化的研究中大有用處。分析紫外可見分光光度計(jì)設(shè)備</p><p style="text-indent:25px">外可見分光光度計(jì)經(jīng)不斷改進(jìn)，又出現(xiàn)自動記錄、自動打印、數(shù)字顯示、微機(jī)控制等各種類型的儀器。低端紫外可見分光光度計(jì)銷售廠家</p><p style="text-indent:25px">使用紫外可見分光光度計(jì)進(jìn)行定量和定性分析需注意以下一些問題：1吸光度讀數(shù)范圍：吸光度測量誤差在透過率過大或過小時(shí)都會變大，為了滿足定量分析的誤差要求（<5%），在定量分析時(shí)要求吸光度應(yīng)在一定的范圍內(nèi)，這個(gè)范圍的具體值與儀器性能有關(guān)，主要是與紫外可見分光光度計(jì)檢測系統(tǒng)噪聲大小有關(guān)，但通常都在0.1~1.0范圍內(nèi)，如果儀器的檔次更低，則范圍更窄。根據(jù)朗伯比爾定律，影響吸光度大小的因素主要是樣品摩爾吸光系數(shù)，濃度和比色皿光程。實(shí)驗(yàn)中吸光度過大的樣品可通過稀釋樣品使吸光度到所需范圍內(nèi)。如果樣品不能稀釋，可以改用光程較小的比色皿減小吸光度。吸光度過小的樣品可使用光程較大的比色皿以增大吸光度。低端紫外可見分光光度計(jì)銷售廠家</p><p style="text-indent:25px">上海儀電分析儀器有限公司專注技術(shù)創(chuàng)新和產(chǎn)品研發(fā)，發(fā)展規(guī)模團(tuán)隊(duì)不斷壯大。一批專業(yè)的技術(shù)團(tuán)隊(duì)，是實(shí)現(xiàn)企業(yè)戰(zhàn)略目標(biāo)的基礎(chǔ)，是企業(yè)持續(xù)發(fā)展的動力。公司以誠信為本，業(yè)務(wù)領(lǐng)域涵蓋分光光度計(jì)，氣相色譜，原子吸收，食品安全，我們本著對客戶負(fù)責(zé)，對員工負(fù)責(zé)，更是對公司發(fā)展負(fù)責(zé)的態(tài)度，爭取做到讓每位客戶滿意。公司憑著雄厚的技術(shù)力量、飽滿的工作態(tài)度、扎實(shí)的工作作風(fēng)、良好的職業(yè)道德，樹立了良好的分光光度計(jì)，氣相色譜，原子吸收，食品安全形象，贏得了社會各界的信任和認(rèn)可。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/1805434.html</p></div></div></div></div></div><div id="oii3w7n" class="page-right twoColRt"><div id="baixypm" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="ey2d2st" class="recomPic likePro"><a href="http://m.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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