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class="searchbox"><div id="rqiyqx8" class="searchLt"><div id="ftq7yon" class="tabs"><a href="JavaScript:;" data-type="product" class="active">產(chǎn)品</a><a href="JavaScript:;" data-type="member" class="">公司</a><a href="JavaScript:;" data-type="article" class="">資訊</a><a href="JavaScript:;" data-type="exhibition" class="">展會</a></div><div id="xb83kcj" class="clearfix searchWrap"><div id="8koqcjl" class="searchInput"><input type="text" name="keywords" placeholder="請輸入搜索關(guān)鍵詞" id="kd"><a href="javascript:void(0)" class="searchBtn" id="search">搜索</a></div></div></div></div></header><nav class="navbox"><div id="42hw7mo" class="container"><ul><li id = "index_index"><a href="http://www.cdcfah.com/"><span>首頁</span></a></li><li id = "index_company"><a ><span>企業(yè)名錄</span></a></li><li id = "index_product"><a href="http://www.cdcfah.com/cp/"><span>產(chǎn)品供應</span></a></li><li id = "index_news"><a href="http://www.cdcfah.com/zx/"><span>新聞資訊</span></a></li><li id = "index_article"><a href="http://www.cdcfah.com/xw/"><span>行業(yè)資訊</span></a></li><li id = "index_show"><a href="http://www.cdcfah.com/zh/"><span>展會信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="c7ugfwo" class="twoCol"><div id="rqxpmya" class="page-proshow clearfix"><p class="current"> 當前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應</a>?<a href="http://www.cdcfah.com/cp/first-_yiqiyibiao/">儀器儀表</a>?<a href="http://www.cdcfah.com/cp/second-yiqiyibiao_gxyq/">光學儀器</a>?<a href="http://www.cdcfah.com/cp/third-gxyq_gpygdj/">光譜儀、光度計</a>?分析紫外可見分光光度計現(xiàn)貨服務為先上海儀電分析儀器供應</p><div id="joln8a2" class="leftbox clearfix"><h1>分析紫外可見分光光度計現(xiàn)貨服務為先上海儀電分析儀器供應</h1><div id="augyq29" class="proBig"><div id="h22awyf" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593091764635/4502162.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="vz332ow" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593091764635/4502162.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="bvcol7y" 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>分析紫外可見分光光度計現(xiàn)貨,紫外可見分光光度計</p><p><span>***更新：</span>2020-11-06 09:27:19</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="nc8npcp" 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: </span>021-34530361</p><p><span>地址: </span>徐塘路88號7幢4層、9幢</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="4pw7mjg" class="page-proshow02"><p class="title">詳細說明</p><div id="t3qheqx" class="box"><p><p> 光柵實現(xiàn)上就是一系列等寬、等距離的平行狹縫，它是利用光的衍射與干涉作用制成的。光柵作為色散元件具有不少獨特的優(yōu)點，光柵單色器的分辨率比棱鏡單色器的分辨率高，可精確到0.2nm，而且可用的波長范圍也比棱鏡單色器的范圍寬。所以，目前生產(chǎn)的紫外可見分光光度計大多采用光柵作為色散元件。 </p> <p> 吸收池是用于盛裝待測液并決定待測溶液透光液層厚度的器皿，又稱比色皿。吸收池一般為長方體，也有圓形或其它形狀的。其底及兩側(cè)為毛玻璃，另兩面為光學透光面。根據(jù)光學透光面的材質(zhì)，吸收池又可分為玻璃吸收池和石英吸收池兩種。玻璃吸收池用于可見光區(qū)測定，石英吸收池用于紫外光區(qū)的測定。吸收池的規(guī)格以光程為標志。常用的吸收池規(guī)格有0.5cm、1，分析紫外可見分光光度計現(xiàn)貨.0cm、2，分析紫外可見分光光度計現(xiàn)貨.0cm、3.0cm，分析紫外可見分光光度計現(xiàn)貨、5.0cm等。大部分單機型的分光光度計包含了驅(qū)動儀器運行和管理數(shù)據(jù)的軟件。與PC機一起聯(lián)用，需要從制造商購買軟件。分析紫外可見分光光度計現(xiàn)貨</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="分析紫外可見分光光度計現(xiàn)貨,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593091764635/4502162.png"></div>紫外可見分光光度計的基本結(jié)構(gòu) <p> 紫外可見分光光度計的工作原理是由光源發(fā)出連續(xù)輻射光，經(jīng)單色器按波長大小色散為單色光，單色光照射到吸收池，一部分被樣品溶液吸收，未被吸收的光經(jīng)檢測器的光電管將光強度變化轉(zhuǎn)變?yōu)殡娦盘栕兓?，并?jīng)信號顯示系統(tǒng)調(diào)制放大后，顯示或打印出吸光度A（或透射比T），完成測定。 </p> <p> 一、光源 </p> <p> 光源是提供符合要求的入射光的裝置，紫外可見分光光度計可見光區(qū)常用的光源為鎢燈，紫外光區(qū)常用的光源為氫燈或氘燈。 </p> <p> 1.1．鎢燈 </p> <p> 鎢燈是常用的可見光光源，它可發(fā)射的波長為325~2500nm的連續(xù)光譜，其中適宜的使用波長范圍為320~1000nm，因此，也可用做近紅外光源。電能將鎢燈加熱到白熾時，發(fā)出的光強度在各波段的分布隨燈絲溫度而變化。燈絲的溫度取決于電源電壓。電源電壓的微小波動都會引起鎢光強度的很大變化。因此必須使用穩(wěn)壓電源供電，鎢燈工作電壓為12V，也可以使用12V的直流電源供電。鎢燈的壽命一般可達10000小時以上。 </p> <p> 目前很多光度計采用鹵鎢燈代替鎢燈，如7230G型、752PLUS型分光光度計等。鹵鎢燈具有較高的發(fā)光效率和較長的使用壽命。中端紫外可見分光光度計單價實驗室選擇時需要根據(jù)自己實驗室的需要和目的用途來考慮。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="分析紫外可見分光光度計現(xiàn)貨,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png"></div><p> 進行單波長測量時，需要考慮朗伯比爾定律對入射光單色性的要求和測定靈敏度的要求。沒有干擾時，一般選擇在吸收峰的MAX吸收波長位置處，如果有干擾，選擇在沒有干擾且吸光度變化較平緩的位置。進行多波長校正時，除盡量滿足單波長測定的波長要求外，還要求多個組分間的吸收光譜間線性無關(guān)。 </p> <p> 紫外分光光度計狹縫的大小會影響到儀器的信噪比和標準曲線的線性范圍。狹縫過大，通常會使線性范圍變小，特別是當不在MAX吸收波長位置測定時更是如此。狹縫過小，信噪比變差，基線平直度和測量數(shù)據(jù)的重復性會變差。此外，還需要考慮樣品吸收峰寬度的影響。通常單波長測定時，一般選擇在MAX吸收波長位置，線性范圍容易滿足，可選擇較寬的狹縫（1~2nm）多波長測定時，很難同時在所有波長都滿足線性范圍要求，應選擇比較小的狹縫。 </p><p> 定性定量。利用特定的吸收峰，快速對待測樣品進行定性和定量分析。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用的，可對此類原料品質(zhì)進行總體把控。 </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。以桑普實驗室這十幾年對苯氧乙醇中雜質(zhì)苯酚的測定方法改進過程為例： </p> <p> 之后建立了4-氨基安替比林比色法，可實現(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> 期間同時采用EP中紫外分光光度法，并將其進行適當改進，作為修訂后的企標。該方法便利快速，可實現(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)把控更嚴格，希望能實現(xiàn)幾個ppm的定量檢測。所以采用了HPLC-DAD作為企標對其檢測。光學構(gòu)造和光源、探測方法、樣品類型和數(shù)據(jù)處理等都是要考慮的因素。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="分析紫外可見分光光度計現(xiàn)貨,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593808795839/2949755.png"></div><p> 紫外可見分光光度計是一類很重要的實驗室分析儀器，無論在物理學、化學、生物學、醫(yī)學、材料學、環(huán)境科學等科學研究領(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都有面向廣的應用。 </p> <p> 紫外可見分光光度計校正 </p> <p> 開機預熱10分鐘足矣； </p> <p> 放入黑塊和標樣（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> 把燈光對標樣，將吸光度調(diào)到100%。 </p> <p> 紫外可見分光光度計使用注意事項 </p> <p> 開機前應先預熱15分鐘，然后開機自檢； </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。傳統(tǒng)單光束UV紫外測試，測試過程全程封閉，單光束光源只通過光柵直接照射樣品，再經(jīng)光電倍增管檢測器檢測。中端紫外可見分光光度計單價</p><p style="text-indent:25px">紫外可見分光光度計應安裝在太陽不能直接曬到的地方，以免“室光” 太強，影響儀器的使用壽命。分析紫外可見分光光度計現(xiàn)貨</p><p> 紫外分光光度計--注意事項 </p> <p> 1．該儀器應放在干燥的房間內(nèi)，使用時放置在堅固平穩(wěn)的工作臺上，室內(nèi)照明不宜太強。熱天時不能用電扇直接向儀器吹風，防止燈泡燈絲發(fā)亮不穩(wěn)定。 </p> <p> 2．使用本儀器前，使用者應該首先了解本儀器的結(jié)構(gòu)和工作原理，以及各個操縱旋鈕之功能。在未按通電源之前，應該對儀器的安全性能進行檢查，電源接線應牢固，通電也要良好，各個調(diào)節(jié)旋鈕的起始位置應該正確，然后再按通電源開關(guān)。 </p> <p> 3．在儀器尚未接通電源時，電表指針必須于“0”刻線上，若不是這種情況，則可以用電表上的校正螺絲進行調(diào)節(jié)。分析紫外可見分光光度計現(xiàn)貨</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)模團隊不斷壯大。目前我公司在職員工以90后為主，是一個有活力有能力有創(chuàng)新精神的團隊。公司以誠信為本，業(yè)務領(lǐng)域涵蓋分光光度計，氣相色譜，原子吸收，食品安全，我們本著對客戶負責，對員工負責，更是對公司發(fā)展負責的態(tài)度，爭取做到讓每位客戶滿意。一直以來公司堅持以客戶為中心、分光光度計，氣相色譜，原子吸收，食品安全市場為導向，重信譽，保質(zhì)量，想客戶之所想，急用戶之所急，全力以赴滿足客戶的一切需要。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1874421.html</p></div></div></div></div></div><div id="blif8b7" class="page-right twoColRt"><div id="lprjlsk" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="etvxzqx" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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