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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>?飼料紫外可見分光光度計賣價歡迎咨詢上海儀電分析儀器供應</p><div id="ut7ipj4" class="leftbox clearfix"><h1>飼料紫外可見分光光度計賣價歡迎咨詢上海儀電分析儀器供應</h1><div id="pdacric" class="proBig"><div id="z7z4nf4" class="bigimg"><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 id="rfhzg7l" 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="edv8bix" 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)品關鍵詞：</span>飼料紫外可見分光光度計賣價,紫外可見分光光度計</p><p><span>***更新：</span>2020-11-18 05:17:30</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="3zlnu3q" 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="yho3z7a" class="page-proshow02"><p class="title">詳細說明</p><div id="cgdahbf" class="box"><p><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域，飼料紫外可見分光光度計賣價，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，飼料紫外可見分光光度計賣價。在水質(zhì)的常規(guī)監(jiān)測中，飼料紫外可見分光光度計賣價，紫外可見分光光度法占有較大的比重，待測物的濃度和干擾物的濃度差別很大。飼料紫外可見分光光度計賣價</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="飼料紫外可見分光光度計賣價,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593893024301/8360761.png"></div><p style="text-indent:25px"><p>紫外可見分光光度計定量、定性分析需注意的問題<p>重復測定次數(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度是比較大的，重復性較好，可選擇較少的重復次數(shù)。相反，如果樣品吸光度很大，狹縫很小，選擇較大的重復次數(shù)可獲得更好的結果。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該用不少于30個數(shù)據(jù)點表示出來。分析檢測紫外可見分光光度計怎么樣由于玻璃材質(zhì)會吸收紫外線，所以目前市面上的紫外可見分光光度計都采用石英棱鏡。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="飼料紫外可見分光光度計賣價,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592155319523/9592810.png"></div><p style="text-indent:25px">紫外分光光度計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，并非直接測量透過吸收池的光強度，而是將光強度轉(zhuǎn)換成電流進行測量，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。光電池價格便宜，但長時間曝光，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*靈敏度比普通光電管高，而且響應速度快，目前中、高性能分光光度計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檢測的一個重要進展。</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> 將分析樣品和標準樣品以相同濃度配制在同一溶劑中，在同一條件下分別測定紫外可見吸收光譜。若兩者是同一物質(zhì)，則兩者的光譜圖應完全一致。如果沒有標樣，也可以和現(xiàn)成的標準譜圖對照進行比較。 </p> <p> 由于紫外吸收光譜只含有2～3個較寬的吸收帶，而紫外光譜主要是分子內(nèi)的發(fā)色團在紫外區(qū)產(chǎn)生的吸收，與分子和其它部分關系不大。具有相同發(fā)色團的不同分子結構，在較大分子中不影響發(fā)色團的紫外吸收光譜，不同的分子結構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。如果分析樣品和標準樣品的吸收波長相同，吸收系數(shù)也相同，則可認為分析樣品與標準樣品為同一物質(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)有較強的吸收峰，就可以檢測出化合物中的雜質(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度，以確定選擇哪一種溶劑。 </p> <p> 金屬離子常與有機物形成絡合物，多數(shù)絡合物在紫外可見區(qū)是有吸收的，我們可以用分光光度法來研究其組成。紫外分光光度計儀器使用一定周期后，由維修工程師或在工程師指導下定期開啟儀器外罩對內(nèi)部進行除塵工作。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="飼料紫外可見分光光度計賣價,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593091764635/4502162.png"></div><p> <br /> </p> <p> 自從60年前紫外分光光度計出現(xiàn)在實驗室的工作臺之后，已經(jīng)形成了一種能解決大部分難題的儀器，從單一波長的測量到高性能多光譜的測量分析。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，光學構造和光源、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> <p> <br /> </p> <p> 光學構造（OPTICALCONFIGURATION） </p> <p> <br /> </p> <p> 一般來說，紫外光分光光度計分為單光束和雙光束兩類。顧名思義，單光束型主要是依賴單束光進行測量。一束給定波長的光通過對照物，然后再通過實際樣品溶液，就能得到吸光結果。 </p> <p> <br /> </p> <p> <br /> </p> <p> 雙光束型則是通過一個斬光輪（mirroredchopperwheel）將一束光分成兩束，分別測量對照樣品和實際樣品?？梢訫IN光漂移（lampdrift）和減少測量時間。一些雙光型光度計不利用斬光輪，而是利用一種光束分光器來代替，將一束光分成兩束平行的光然后同時測量對照樣品和目的樣品。因為增加了測量的速度，所以雙光束分光光度計在測量一些溶液隨時間動態(tài)變化的研究中大有用處。 </p> <p> <br /> 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。甲醇紫外可見分光光度計差價</p><p style="text-indent:25px">按所吸收光的波長區(qū)域不同，分為紫外分光光度法和可見分光光度法，合稱為紫外-可見分光光度法。飼料紫外可見分光光度計賣價</p><p> 使用紫外分光光度計的過程中，經(jīng)常會遇到儀器因光源達不到要求，需要進行調(diào)修。要求光源燈處不能有空氣流動，因為單光束儀器很忌諱空氣快速流動而使光源燈的色溫發(fā)生變化。如遇電壓正常而鎢燈不亮時，就需要更換鎢燈。更換時，不要用手直接接觸燈泡表面，如果手指摸過，應用無水乙醇和C4H10O混合液擦拭干凈，否則通電后指印遇熱不能去除。安裝光源燈后要注意調(diào)整光路。光源燈有兩個引線頭，安裝時用導線焊接，主要是防止接觸不良而造成的光源發(fā)光不穩(wěn)現(xiàn)象。在焊接時防止焊點與燈頭銅皮碰上，裝上燈座使電源短路。燈絲要求平直，如果燈絲彎曲，會影響光能量。燈絲的位置要與入射狹縫平行并對準，上、下、左、右調(diào)節(jié)后緊固螺釘。擰緊燈座的螺紋套，可用鉗子擰緊，一般燈頭盡量往燈座里塞，因為多數(shù)燈絲離燈頭偏高。調(diào)整燈位置的前后可移動整個燈座架，它下面有三個固定螺釘，先稍松后，移動前后位置再固定。一般調(diào)節(jié)鎢燈的位置時，將波長調(diào)到580nm處，狹縫調(diào)到MAX，把一張白紙置于比色皿盒邊出口處，觀察白紙上的光斑。若光斑上方左右角均不完整成半圓弧，可能是光源燈高度不對；光斑左邊或右邊不完整，可調(diào)光源燈底座位置。調(diào)整至白紙上可見明亮、均勻的長方形黃橙色光斑。飼料紫外可見分光光度計賣價</p><p style="text-indent:25px">上海儀電分析儀器有限公司辦公設施齊全，辦公環(huán)境優(yōu)越，為員工打造良好的辦公環(huán)境。儀電分析,上分是上海儀電分析儀器有限公司的主營品牌，是專業(yè)的儀器儀表、電子元器件及相關的系統(tǒng)集成的生產(chǎn)、服務及銷售，計算機軟件開發(fā)及銷售，從事貨物進出口及技術進出口業(yè)務?！疽婪毥?jīng)批準的項目，經(jīng)相關部門批準后方可開展經(jīng)營活動】儀器儀表、電子元器件及相關的系統(tǒng)集成的生產(chǎn)、服務及銷售，計算機軟件開發(fā)及銷售，從事貨物進出口及技術進出口業(yè)務。【依法須經(jīng)批準的項目，經(jīng)相關部門批準后方可開展經(jīng)營活動】公司，擁有自己**的技術體系。公司不**提供專業(yè)的儀器儀表、電子元器件及相關的系統(tǒng)集成的生產(chǎn)、服務及銷售，計算機軟件開發(fā)及銷售，從事貨物進出口及技術進出口業(yè)務?！疽婪毥?jīng)批準的項目，經(jīng)相關部門批準后方可開展經(jīng)營活動】儀器儀表、電子元器件及相關的系統(tǒng)集成的生產(chǎn)、服務及銷售，計算機軟件開發(fā)及銷售，從事貨物進出口及技術進出口業(yè)務。【依法須經(jīng)批準的項目，經(jīng)相關部門批準后方可開展經(jīng)營活動】，同時還建立了完善的售后服務體系，為客戶提供良好的產(chǎn)品和服務。自公司成立以來，一直秉承“以質(zhì)量求生存，以信譽求發(fā)展”的經(jīng)營理念，始終堅持以客戶的需求和滿意為重點，為客戶提供良好的分光光度計，氣相色譜，原子吸收，食品安全，從而使公司不斷發(fā)展壯大。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2037971.html</p></div></div></div></div></div><div id="cwyv8qb" class="page-right twoColRt"><div id="hgiacjy" class="box01 margin10 clearfix"><h3><a 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