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<a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="96fysqe" class="page-proshow02"><p class="title">詳細說明</p><div id="78qtxcm" class="box"><p><p> 我們都知道，紫外-可見分光光度計是實驗室中出鏡率相當高的分析儀器。 </p> <p> 那么你的使用情況如何呢？ </p> <p> 你所關注紫外-可見分光光度計的哪些性能？ </p> <p> 大家都來說說吧！分光光度法是通過測定被測物質，在特定波長處或一定波長范圍內光的吸光度或發(fā)光強度，對該物質進行定性和定量分析的方法。紫外-可見分光光度計是元析儀器引用新型技術，其功能強大，采用單色器技術，波長范圍190-1100nm，是各種涉及水和廢水分析領域的通用儀器，應用范圍包括化工分析以及市政和工業(yè)廢水，國產**紫外可見分光光度計性價比，飲用水，國產**紫外可見分光光度計性價比，加工過程用水，地表水，冷卻水和鍋爐補給水等液體的分析。紫外可見分光光度計，國產**紫外可見分光光度計性價比，可以通過更換光源分別形成可見和紫外光區(qū)，測定的波長在200～1000nm。國產**紫外可見分光光度計性價比</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國產**紫外可見分光光度計性價比,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png"></div><p style="text-indent:25px">紫外分光光度計檢測器是將光信號轉變?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，而是將光強度轉換成電流進行測量，這種光電轉換器件稱為檢測器，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。國產**紫外可見分光光度計代理分光光度計的氘燈和汞燈是在不同波長的時候有程序控制自動變換的，一般是在360nm處變換。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國產**紫外可見分光光度計性價比,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593091764635/4502162.png"></div><p> 原子吸收分光光度計與紫外可見分光光度計的區(qū)別介紹 </p> <p> 原理： </p> <p> 原子吸收觀察的是構成物質的元素（原子）中的電子在原子軌道中的躍遷，屬于原子吸收. </p> <p> 紫外可見光吸收觀察的是構成物質的分子中的電子在分子軌道中的躍遷，屬于分子吸收. </p> <p> 能量: </p> <p> 兩者有所同，又有所不同。定量分析的原則同，而測量所需的光能量不同： </p> <p> 原子吸收為X射線，能量大，可激發(fā)電子從低的原子軌道向高的原子軌道躍遷. </p> <p> 紫外可見吸收為紫外光及可見光，能量小，只能激發(fā)電子從分子軌道向MAX低（或次低）的空的分子軌道躍遷。 </p> <p> 通俗的說，原子吸收分光光度計是用較高的溫度來燃燒分子，使之原子化（變?yōu)榛鶓B(tài)原子），再通過特征輻射，把基態(tài)原子激發(fā)，并吸收能量，通過這個能量差（透過率）來計算出濃度。而紫外—可見分光光度計是通過顯色劑（一種能和我們被測元素產生絡合反應的分子），與我們的被測元素產生反應，并且反應物分子帶有特定的顏色，經(jīng)過分子吸收氘燈（紫外區(qū)）或鎢燈（可見區(qū)）的照射，吸收燈發(fā)射的能量，通過能量差（透過率）來計算出濃度。 </p><p> 紫外可見分光光度計的發(fā)展分光光度法在分析領域中的應用已經(jīng)有數(shù)十年的歷史，至今仍是應用常用的分析方法之一。隨著分光元器件及分光技術、檢測器件與檢測技術、大規(guī)模集成制造技術等的發(fā)展，以及單片機、微處理器、計算機和DSP技術的應用，分光光度計的性能指標不斷提高，并向自動化、智能化、高速化和小型化等方向發(fā)展。 </p> <p> 在分光元器件方面，經(jīng)歷了棱鏡、機刻光柵和全息光柵的過程，商品化的全息閃耀光柵已迅速取代一般刻劃光柵。在儀器控制方面，隨著單片機、微處理器的出現(xiàn)以及軟硬件技術的結合，從早期的人工控制進步到了自動控制。在顯示、記錄與繪圖方面，早期采用表頭(電位計)指示、繪圖儀繪圖，后來用數(shù)字電壓表數(shù)字顯示，如今更多地采用液晶屏幕或計算機屏幕顯示。在檢測器方面，早期使用光電池、光電管，后來更普遍地使用光電倍增管甚至光電二極管陣列。陣列型檢測器和凹面光柵的聯(lián)合應用，使儀器的測量速度發(fā)生了質的飛躍，且性能更加穩(wěn)定可靠，受到儀器用戶的青睞，在儀器構型方面，從單光束發(fā)展為雙光束，現(xiàn)在幾乎所有高級分光光度計都是雙光束的，有些高精度的儀器采用雙單色器。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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國產**紫外可見分光光度計性價比,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593980700101/5381945.png"></div><p> 雜散光：典型值是0.01～0.05%T，在國外的產品中有65種產品的雜散光指標在這一范圍中。雜散光超過0.05%T的產品有31種，小于0.01%T的產品有19種。。從其光學設計看，都采用了雙單色器。與掃描光柵型產品相比，固定光柵的分光光度計少了出射狹縫，實現(xiàn)低雜散光的難度更大。從性能指標來看，范圍是0.01～1%T。26種固定光柵型產品中雜散光在0.01～0.05%T之間的有13種，也已達到半數(shù)，但是能夠低于0.01%T的很少。波長準確性，國外的典型水平是0.1～1nm。國內產品中，處于此范圍的有16種，基本達到同一水平，但沒有優(yōu)于0.1nm的產品。國內產品的光度準確性大多以透過率表示，水平比較接近，均在0.3～0.5%T之間。在10%T處，也就是吸光度為1A處，將光度準確性以吸光度表示，則數(shù)值為0.013～0.021A。與國外產品有比較明顯的差距。國內產品的光度重復性基本在0.1～0.3%T范圍，同樣在吸光度1A處換算，數(shù)值為0.004～0.013A，也存在距離。比較國外與國內產品的雜散光的典型值，兩者幾乎相差了一個數(shù)量級。但是已有一些較新研發(fā)的產品，可以達到國外產品的普遍水準。初次使用紫外可見分光光度計的人員，一般來說，一定要詳細閱讀儀器安全操作手冊。國產**紫外可見分光光度計代理</p><p style="text-indent:25px">由于玻璃材質會吸收紫外線，所以目前市面上的紫外可見分光光度計都采用石英棱鏡。國產**紫外可見分光光度計性價比</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，還是在化工、醫(yī)藥、環(huán)境檢測、冶金等現(xiàn)代化生產與管理部門，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0； </p> <p> 把燈光對標樣，將吸光度調到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。國產**紫外可見分光光度計性價比</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，是一家生產型企業(yè)。儀電分析是一家有限責任公司企業(yè)，一直“以人為本，服務于社會”的經(jīng)營理念;“誠守信譽，持續(xù)發(fā)展”的質量方針。公司始終堅持客戶需求優(yōu)先的原則，致力于提供高質量的分光光度計，氣相色譜，原子吸收，食品安全。儀電分析自成立以來，一直堅持走正規(guī)化、專業(yè)化路線，得到了廣大客戶及社會各界的普遍認可與大力支持。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1972109.html</p></div></div></div></div></div><div id="asxbghn" class="page-right twoColRt"><div id="1qur224" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="1jx7k36" class="recomPic likePro"><a href="http://www.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配件哪家強信息推薦自業(yè)物資供應" class="vcenter" 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