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class="button">聯(lián)系我們</a></div></div><div id="b8segnp" 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="iczmeq3" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="vovx2ia" class="box"><p><p style="text-indent:25px"><p>綜合評價紫外可見光分光光度計儀器：根據(jù)使用領(lǐng)域進(jìn)行初步篩選，科研、制藥領(lǐng)域注重選擇光譜可調(diào)的紫外可見光分光光度計。其中，制藥中藥檢儀器要符合藥典規(guī)定，光譜帶寬要求為2nm以下。<p>重要性能指標(biāo)的考察，包括：光度準(zhǔn)確度，雜散光，光譜帶寬，穩(wěn)定性，三用紫外可見分光光度計生產(chǎn)廠家，噪聲，波長的準(zhǔn)確度和重復(fù)性是幾個重要指標(biāo)。各指標(biāo)間相互獨(dú)立有相互影響，三用紫外可見分光光度計生產(chǎn)廠家，三用紫外可見分光光度計生產(chǎn)廠家，需要綜合考量選購目標(biāo)紫外可見光分光光度計。<p>使用前，閱讀儀器使用說明書和做好儀器使用前的工程師培訓(xùn)。使用過程中，正確操作、認(rèn)真了解儀器指標(biāo)的物理意義和測試方法以及結(jié)合儀器使用中的相關(guān)設(shè)備的調(diào)試。掌握儀器的基本保養(yǎng)維護(hù)知識，建立相關(guān)指標(biāo)與分析測試結(jié)果之間的誤差影響條件，經(jīng)常檢測和調(diào)試儀器，確保儀器處在合適的工作狀態(tài)。分光光度分析就是根據(jù)物質(zhì)的吸收光譜研究物質(zhì)的成分、結(jié)構(gòu)和物質(zhì)間相互作用的有效手段。三用紫外可見分光光度計生產(chǎn)廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="三用紫外可見分光光度計生產(chǎn)廠家,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593139440396/4585287.png"></div><p> 當(dāng)以空白試劑為參比調(diào)節(jié)儀器零點(diǎn)時，比色皿窗材料的吸收、內(nèi)外窗面的散射以及溶劑的吸收等都被抵消，所得吸光度值完全由顯色溶液中待測離了濃度所決定。此時吸光度值與試液濃度一般呈線性關(guān)系。吸光度值與測定濃度不成直線關(guān)系，發(fā)生向下彎曲(負(fù)偏離)或向上彎曲(正偏離)的現(xiàn)象而偏離朗伯一比爾定律的主要原因如下。 </p> <p> <br /> </p> <p> (1)非單色光的影響：紫外一可見分光光度訃使用連續(xù)光源和分光器分光，不可能得到真正理想的單色光；為保證在測量中能得到充分的光強(qiáng)，儀器必須保持一定的狹縫寬度。由狹縫射出后投射到被測物質(zhì)上的光，是一個有限寬度的譜帶——光譜通帶。隨光譜通帶寬度的增大，吸收光譜的分辨率降低，并偏離朗伯一比爾定律。 </p> <p> (2)非吸收光的影響：當(dāng)來自出射狹縫的光的光譜通帶寬度大于吸收光譜譜帶時，投射在被測物質(zhì)上的光就含有非吸收光。這不僅能使靈敏度降低，且能使校準(zhǔn)曲線向橫坐標(biāo)軸彎曲而偏離朗伯一比爾定律。直讀紫外可見分光光度計現(xiàn)貨測量吸光度并不是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，稱為紫外分光光度計的檢測器。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="三用紫外可見分光光度計生產(chǎn)廠家,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png"></div><p style="text-indent:25px">紫外可見分光光度計的展望紫外可見分光光度計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依托成熟的設(shè)計制造工藝，并結(jié)合計算機(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的設(shè)計，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、實(shí)時化將是一大方向。要使分光光度計走出實(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的使用變得更方便，同時也使分光光度計的配置變得更靈活。光纖結(jié)合模塊化設(shè)計，可能使得分光光度計可以突破完全固定、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。計算機(jī)技術(shù)的影響將更為增進(jìn)。分光光度計的自動化、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。</p><p> 光學(xué)構(gòu)造（OPTICAL CONFIGURATION）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(jìn)行測量。一束給定波長的光通過對照物，然后再通過實(shí)際樣品溶液，就能得到吸光結(jié)果。 </p> <p> 雙光束型則是通過一個斬光輪（mirrored chopper wheel）將一束光分成兩束，分別測量對照樣品和實(shí)際樣品?？蒑IN光漂移（lamp drift）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?yàn)樵黾恿藴y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。紫外光分光光度計分為單光束和雙光束兩類。單光束型主要是依賴單束光進(jìn)行測量。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="三用紫外可見分光光度計生產(chǎn)廠家,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592124342670/5540999.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(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(jìn)展。自從60年前紫外分光光度計出現(xiàn)在實(shí)驗(yàn)室的工作臺之后，已經(jīng)形成了一種能解決大多數(shù)難題的儀器。直讀紫外可見分光光度計現(xiàn)貨</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。三用紫外可見分光光度計生產(chǎn)廠家</p>紫外可見分光光度計使用中常見問題解析 <p> 在一般分光光度計的使用說明書上，要求儀器預(yù)熱時間約20分鐘；若是帶微處理器的分光光度計，開機(jī)后儀器自動進(jìn)入自檢(初始化)狀態(tài)，約需1O分鐘左右。在分光光度計預(yù)熱這個環(huán)節(jié)上，很多使用者或多或少存在問題，如開機(jī)只預(yù)熱電路系統(tǒng)(不調(diào)節(jié)波長、打開吸收池暗箱蓋預(yù)熱等)或認(rèn)為初始化過程就是預(yù)熱等等。對帶微處理器有自檢功能的分光光度計，開機(jī)后儀器自檢(初始化)結(jié)束后，在測定窗口上，設(shè)置所需波長值，用一個吸收池裝上純凈水置于光路上，調(diào)“0000A”后，預(yù)熱儀器，當(dāng)儀器顯示讀數(shù)不再變化后即可進(jìn)行測定。 </p> <p> 對于紫外可見分光光度計，由于有雙光源(鎢燈與氘燈)，為了延長燈的使用壽命，開機(jī)自檢完成后可以關(guān)掉測定時不用的光源燈。三用紫外可見分光光度計生產(chǎn)廠家</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，交通便利，環(huán)境優(yōu)美，是一家生產(chǎn)型企業(yè)。儀電分析是一家有限責(zé)任公司企業(yè)，一直“以人為本，服務(wù)于社會”的經(jīng)營理念;“誠守信譽(yù)，持續(xù)發(fā)展”的質(zhì)量方針。公司業(yè)務(wù)涵蓋分光光度計，氣相色譜，原子吸收，食品安全，價格合理，品質(zhì)有保證，深受廣大客戶的歡迎。儀電分析自成立以來，一直堅(jiān)持走正規(guī)化、專業(yè)化路線，得到了廣大客戶及社會各界的普遍認(rèn)可與大力支持。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1826981.html</p></div></div></div></div></div><div id="qxzryac" class="page-right twoColRt"><div id="wlsuwiu" class="box01 margin10 clearfix"><h3><a 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