直讀紫外可見分光光度計(jì)現(xiàn)貨誠(chéng)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(tái)【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)種類及優(yōu)缺點(diǎn)對(duì)比單光束UV：傳統(tǒng)的紫外，單光源發(fā)射單光束，全程密閉，通過光柵，照射樣品，由光電倍增管監(jiān)測(cè)器檢測(cè)。缺點(diǎn)：測(cè)完空白再測(cè)試樣品，全波段分析時(shí)間較長(zhǎng)（一般2min）。2比例雙光束UV：?jiǎn)喂庠磫喂馐堂荛]，通過光"><meta name="keywords" content="直讀紫外可見分光光度計(jì)現(xiàn)貨,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" 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class="searchbox"><div id="mq73pgn" class="searchLt"><div id="jscpcri" 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(huì)</a></div><div id="zoli334" class="clearfix searchWrap"><div id="dmerbnp" class="searchInput"><input type="text" name="keywords" placeholder="請(qǐng)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="tmebyfh" class="container"><ul><li id = "index_index"><a href="http://www.cdcfah.com/"><span>首頁(yè)</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(yīng)</span></a></li><li id = "index_news"><a href="http://www.cdcfah.com/zx/"><span>新聞資訊</span></a></li><li id = 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src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592124342670/5540999.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="dspe8f9" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592124342670/5540999.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="x8u4yvs" 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>直讀紫外可見分光光度計(jì)現(xiàn)貨,紫外可見分光光度計(jì)</p><p><span>***更新：</span>2020-11-16 01:17:31</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="2eb23b9" 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="oifugik" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="lvnu2qa" class="box"><p><p> 紫外可見分光光度計(jì)種類及優(yōu)缺點(diǎn)對(duì)比 </p> <p> <br /> </p> <p> 單光束UV：傳統(tǒng)的紫外，單光源發(fā)射單光束，全程密閉，通過光柵，照射樣品，由光電倍增管監(jiān)測(cè)器檢測(cè)。 </p> <p> 缺點(diǎn)：測(cè)完空白再測(cè)試樣品，全波段分析時(shí)間較長(zhǎng)（一般2min）。2比例雙光束UV：?jiǎn)喂庠磫喂馐?，全程密閉，通過光柵，加入棱鏡，把光分為兩束，分別照射樣品與空白，再合并光，進(jìn)入光電倍增管檢測(cè)器，通過差減法計(jì)算結(jié)果。 </p> <p> 好處：空白樣品同時(shí)檢測(cè)。 </p> <p> 缺點(diǎn)：靈敏度下降，全波段分析時(shí)間較長(zhǎng)。3雙光束UV：?jiǎn)喂庠磫喂馐堂荛]，通過棱鏡分出兩道光，分別通過一光柵，分別進(jìn)入各自的光點(diǎn)倍增管檢測(cè)器，直讀紫外可見分光光度計(jì)現(xiàn)貨。 </p> <p> 好處：加強(qiáng)靈敏度，同時(shí)測(cè)量空白與樣品。 </p> <p> 缺點(diǎn)：全波段分析時(shí)間較長(zhǎng)。4全波段UV：?jiǎn)喂庠磫喂馐?，樣品與空白暴露在空氣中，照射樣品，開始進(jìn)入密閉箱，通過光柵，進(jìn)入DAD檢測(cè)器。 </p> <p> 好處：空白只需要檢測(cè)一次，如果你愿意一輩子檢測(cè)這一次都可以。檢測(cè)樣品不密閉，外界光線對(duì)其無影響，直讀紫外可見分光光度計(jì)現(xiàn)貨，使用方便且精確，直讀紫外可見分光光度計(jì)現(xiàn)貨。分析任何波段或全波段不到1s。 </p> <p> 缺點(diǎn)：貴。（25W）目前市場(chǎng)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)。直讀紫外可見分光光度計(jì)現(xiàn)貨</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="直讀紫外可見分光光度計(jì)現(xiàn)貨,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592124342670/5540999.png"></div><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(zhǎng)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(cè)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(cè)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(cè)量的現(xiàn)場(chǎng)化、實(shí)時(shí)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(cè)量分析設(shè)備，陣列式探測(cè)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，同時(shí)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(shí)也是實(shí)現(xiàn)在線測(cè)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(dòng)化、智能化是一個(gè)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。直讀紫外可見分光光度計(jì)現(xiàn)貨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(jí)躍遷而產(chǎn)生的吸收光譜。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="直讀紫外可見分光光度計(jì)現(xiàn)貨,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594849245086/5585171.png"></div><p> 紫外可見分光光度計(jì)的軟件功能可以極大地提升儀器的使用性能和價(jià)值，現(xiàn)代分光光度計(jì)生產(chǎn)廠商都非常重視儀器配套軟件的開發(fā)。除了儀器控制軟件和通用數(shù)據(jù)分析處理軟件外，很多儀器針對(duì)不同行業(yè)應(yīng)用開發(fā)了**分析軟件，給儀器使用者帶來了極大的便利。 </p> <p> 紫外可見分光光度計(jì)的結(jié)構(gòu)一般地，紫外可見分光光度計(jì)主要由光源系統(tǒng)、單色器系統(tǒng)、樣品室、檢測(cè)系統(tǒng)組成，如圖1所示。光源發(fā)出的復(fù)合光通過單色器被分解成單色光，當(dāng)單色光通過樣品室時(shí)，一部分被樣品吸收，其余未被吸收的光到達(dá)檢測(cè)器，被轉(zhuǎn)變?yōu)殡娦盘?hào)，經(jīng)電子電路的放大和數(shù)據(jù)處理后，通過顯示系統(tǒng)給出測(cè)量結(jié)果。 </p><p> 可見分光光度計(jì)是一種常規(guī)的實(shí)驗(yàn)室分析儀器?？沙Ｓ糜跓o機(jī)物、有機(jī)物的定性、定量分析中，在科研、制藥、化工、環(huán)保、衛(wèi)生、防疫等領(lǐng)域中發(fā)揮重要的作用。有人說，紫外、可見分光光度計(jì)就是一把尺子一個(gè)天平，凡是有化驗(yàn)、分析的地方都能用到它。那么，如何評(píng)價(jià)一臺(tái)紫外、可見分光光度計(jì)的優(yōu)劣呢? </p> <p> 要考察它的外觀。試想，一臺(tái)外型呆板、做工粗糙的儀器，怎么可能是一臺(tái)先進(jìn)的儀器呢? </p> <p> 我們探討一下會(huì)對(duì)儀器的使用有很大影響的幾個(gè)重要指標(biāo) </p> <p> <p> 1、光度準(zhǔn)確度 </p> <p> 2、雜散光 </p> <p> 3、光譜帶寬 </p> <p> 4、穩(wěn)定性 </p> <p> 5、噪聲 </p> <p> 6、波長(zhǎng)的準(zhǔn)確度和重復(fù)性 </p> <p> <br /> </p> 測(cè)量吸光度并不是測(cè)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(cè)量，稱為紫外分光光度計(jì)的檢測(cè)器。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="直讀紫外可見分光光度計(jì)現(xiàn)貨,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593893024301/8360761.png"></div><p> 紫外分光光度計(jì)--注意事項(xiàng) </p> <p> 1．該儀器應(yīng)放在干燥的房間內(nèi)，使用時(shí)放置在堅(jiān)固平穩(wěn)的工作臺(tái)上，室內(nèi)照明不宜太強(qiáng)。熱天時(shí)不能用電扇直接向儀器吹風(fēng)，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(yīng)該首先了解本儀器的結(jié)構(gòu)和工作原理，以及各個(gè)操縱旋鈕之功能。在未按通電源之前，應(yīng)該對(duì)儀器的安全性能進(jìn)行檢查，電源接線應(yīng)牢固，通電也要良好，各個(gè)調(diào)節(jié)旋鈕的起始位置應(yīng)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(shí)，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(jìn)行調(diào)節(jié)。紫外可見光分光光度計(jì)是使用紫外光譜特點(diǎn)而設(shè)計(jì)制造的光學(xué)儀器。環(huán)保紫外可見分光光度計(jì)廠家</p><p style="text-indent:25px">一般來說，紫外光分光光度計(jì)分為單光束和雙光束兩類。直讀紫外可見分光光度計(jì)現(xiàn)貨</p><p> 根據(jù)吸收光譜圖上的一些特征吸收，特別是MAX吸收波長(zhǎng)λmax和摩爾吸收系數(shù)ε，是檢定物質(zhì)的常用物理參數(shù)。 </p> <p> 將分析樣品和標(biāo)準(zhǔn)樣品以相同濃度配制在同一溶劑中，在同一條件下分別測(cè)定紫外可見吸收光譜。若兩者是同一物質(zhì)，則兩者的光譜圖應(yīng)完全一致。如果沒有標(biāo)樣，也可以和現(xiàn)成的標(biāo)準(zhǔn)譜圖對(duì)照進(jìn)行比較。 </p> <p> 由于紫外吸收光譜只含有2～3個(gè)較寬的吸收帶，而紫外光譜主要是分子內(nèi)的發(fā)色團(tuán)在紫外區(qū)產(chǎn)生的吸收，與分子和其它部分關(guān)系不大。具有相同發(fā)色團(tuán)的不同分子結(jié)構(gòu)，在較大分子中不影響發(fā)色團(tuán)的紫外吸收光譜，不同的分子結(jié)構(gòu)有可能有相同的紫外吸收光譜，但它們的吸收系數(shù)是有差別的。如果分析樣品和標(biāo)準(zhǔn)樣品的吸收波長(zhǎng)相同，吸收系數(shù)也相同，則可認(rèn)為分析樣品與標(biāo)準(zhǔn)樣品為同一物質(zhì)。 </p> <p> <span style="display:none;"></span> </p> <p> 紫外吸收光譜能測(cè)定化合物中含有微量的具有紫外吸收的雜質(zhì)。如果化合物的紫外可見光區(qū)沒有明顯的吸收峰，而它的雜質(zhì)在紫外區(qū)內(nèi)有較強(qiáng)的吸收峰，就可以檢測(cè)出化合物中的雜質(zhì)。 </p> <p> 不同的極性溶劑產(chǎn)生氫鍵的強(qiáng)度也不同，這可以利用紫外光譜來判斷化合物在不同溶劑中氫鍵強(qiáng)度，以確定選擇哪一種溶劑。 </p> <p> 金屬離子常與有機(jī)物形成絡(luò)合物，多數(shù)絡(luò)合物在紫外可見區(qū)是有吸收的，我們可以用分光光度法來研究其組成。直讀紫外可見分光光度計(jì)現(xiàn)貨</p><p style="text-indent:25px">上海儀電分析儀器有限公司是一家儀器儀表、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(yíng)活動(dòng)】?jī)x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(yíng)活動(dòng)】的公司，是一家集研發(fā)、設(shè)計(jì)、生產(chǎn)和銷售為一體的專業(yè)化公司。儀電分析作為儀器儀表、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(yíng)活動(dòng)】?jī)x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(yíng)活動(dòng)】的企業(yè)之一，為客戶提供良好的分光光度計(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，為用戶帶來良好體驗(yàn)。儀電分析始終關(guān)注儀器儀表市場(chǎng)，以敏銳的市場(chǎng)洞察力，實(shí)現(xiàn)與客戶的成長(zhǎng)共贏。</p></p><br 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