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clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="stazgiz" class="twoCol"><div id="ei8gfwd" 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(yīng)</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>?飼料紫外可見分光光度計性價比歡迎咨詢上海儀電分析儀器供應(yīng)</p><div id="3tb3si8" class="leftbox clearfix"><h1>飼料紫外可見分光光度計性價比歡迎咨詢上海儀電分析儀器供應(yīng)</h1><div id="n7krheq" class="proBig"><div id="ba7bqxj" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592216930546/1658567.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="8j2ttv3" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592216930546/1658567.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="8buwdp3" 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>飼料紫外可見分光光度計性價比,紫外可見分光光度計</p><p><span>***更新：</span>2020-11-10 09:25:42</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="nwyfmdf" 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="8b2itpg" class="page-proshow02"><p class="title">詳細說明</p><div id="c2gnubn" class="box"><p><p> 752N紫外可見分光光度計產(chǎn)品介紹 </p> <p> 該產(chǎn)品采用微處理機控制技術(shù)在紫外可見光譜區(qū)域內(nèi)對物質(zhì)作定性、定量分析，是常規(guī)實驗室必備的多用途分析儀器。 </p> <p> 主要特點： </p> <p> ●全息閃耀光柵單色器，具有波長精度高，單色性好，雜散光低等優(yōu)點。 </p> <p> ●全新液晶屏顯示，讀數(shù)清晰自然。 </p> <p> ●采用微機測量系統(tǒng)，T-A轉(zhuǎn)換精度高，并有自動調(diào)0％T和調(diào)100％T，濃度因子設(shè)定、濃度直讀，飼料紫外可見分光光度計性價比。 </p> <p> ●測量讀數(shù)準確性高，飼料紫外可見分光光度計性價比，重現(xiàn)性好和穩(wěn)定性佳。 </p> <p> ●自動光門技術(shù)，操作便捷，飼料紫外可見分光光度計性價比。 </p> <p> 選配： </p> <p> ●熱敏繪圖打印機 </p> <p> ●**光譜軟件 </p> <p> ●5cm或10cm比色皿架在操作紫外可見分光光度計時，操作人員需要留意一下機器的干燥劑。飼料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="飼料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/ydfx123/637396592216930546/1658567.png"></div><p> 紫外可見分光光度計種類及優(yōu)缺點對比 </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)測器檢測。 </p> <p> 缺點：測完空白再測試樣品，全波段分析時間較長（一般2min）。2比例雙光束UV：單光源單光束，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，進入光電倍增管檢測器，通過差減法計算結(jié)果。 </p> <p> 好處：空白樣品同時檢測。 </p> <p> 缺點：靈敏度下降，全波段分析時間較長。3雙光束UV：單光源單光束，全程密閉，通過棱鏡分出兩道光，分別通過一光柵，分別進入各自的光點倍增管檢測器。 </p> <p> 好處：加強靈敏度，同時測量空白與樣品。 </p> <p> 缺點：全波段分析時間較長。4全波段UV：單光源單光束，樣品與空白暴露在空氣中，照射樣品，開始進入密閉箱，通過光柵，進入DAD檢測器。 </p> <p> 好處：空白只需要檢測一次，如果你愿意一輩子檢測這一次都可以。檢測樣品不密閉，外界光線對其無影響，使用方便且精確。分析任何波段或全波段不到1s。 </p> <p> 缺點：貴。（25W）常用紫外可見分光光度計銷售廠家紫外可見光的范圍內(nèi)，對于一個特定的波長，吸收的程度正比于試樣中該成分的濃度，可以進行定性分析。</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性價比,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593808795839/2949755.png"></div><p style="text-indent:25px">使用紫外可見分光光度計進行定量和定性分析需注意以下一些問題：1吸光度讀數(shù)范圍：吸光度測量誤差在透過率過大或過小時都會變大，為了滿足定量分析的誤差要求（<5%），在定量分析時要求吸光度應(yīng)在一定的范圍內(nèi)，這個范圍的具體值與儀器性能有關(guān)，主要是與紫外可見分光光度計檢測系統(tǒng)噪聲大小有關(guān)，但通常都在0.1~1.0范圍內(nèi)，如果儀器的檔次更低，則范圍更窄。根據(jù)朗伯比爾定律，影響吸光度大小的因素主要是樣品摩爾吸光系數(shù)，濃度和比色皿光程。實驗中吸光度過大的樣品可通過稀釋樣品使吸光度到所需范圍內(nèi)。如果樣品不能稀釋，可以改用光程較小的比色皿減小吸光度。吸光度過小的樣品可使用光程較大的比色皿以增大吸光度。</p><p> 紫外分光光度計--注意事項 </p> <p> 1．該儀器應(yīng)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(yīng)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(yīng)該對儀器的安全性能進行檢查，電源接線應(yīng)牢固，通電也要良好，各個調(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，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)。紫外可見吸收光譜是由于分子中的某些基團吸收了紫外可見輻射光后，發(fā)生了電子能級躍遷而產(chǎn)生的吸收光譜。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="飼料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/ydfx123/637396592155319523/9592810.png"></div><p> 分光光度計作為一種精密儀器，在運行工作過程中由于工作環(huán)境、操作方法等種種原因，其技術(shù)狀況必然會發(fā)生某些變化，可能影響設(shè)備的性能，甚至誘發(fā)設(shè)備故障及事故。因此，分析工作者必須了解分光光度計的基本原理和使用說明，并能及時發(fā)現(xiàn)和排除這些隱患，對已產(chǎn)生的故障及時維修才能保證儀器設(shè)備的正常運行。 </p> <p> 若大幅度改變測試波長，需稍等片刻，等燈熱平衡后，重新校正“0”和“100%”點。然后再測量。 </p> <p> 指針式儀器在未接通電源時，電表的指針必須位于零刻度上。若不是這種情況，需進行機械調(diào)零。 </p> <p> 比色皿使用完畢后，請立即用蒸餾水沖洗干凈，并用干凈柔軟的紗布將水跡擦去，以防止表面光潔度被破壞，影響比色皿的透光率。 </p> <p> 操作人員不應(yīng)輕易動燈泡及反光鏡燈，以免影響光效率。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。國內(nèi)知名紫外可見分光光度計經(jīng)銷商</p><p style="text-indent:25px">為了選擇合適的狹縫寬度，應(yīng)以減少狹縫寬度時紫外分光光度計試樣的吸光度不再增加為準。飼料紫外可見分光光度計性價比</p><p> 當以空白試劑為參比調(diào)節(jié)儀器零點時，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，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，且能使校準曲線向橫坐標軸彎曲而偏離朗伯一比爾定律。飼料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擁有儀器儀表、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，計算機軟件開發(fā)及銷售，從事貨物進出口及技術(shù)進出口業(yè)務(wù)。【依法須經(jīng)批準的項目，經(jīng)相關(guān)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(guān)的系統(tǒng)集成的生產(chǎn)、服務(wù)及銷售，計算機軟件開發(fā)及銷售，從事貨物進出口及技術(shù)進出口業(yè)務(wù)?！疽婪毥?jīng)批準的項目，經(jīng)相關(guān)部門批準后方可開展經(jīng)營活動】等多項業(yè)務(wù)，主營業(yè)務(wù)涵蓋分光光度計，氣相色譜，原子吸收，食品安全。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。誠實、守信是對企業(yè)的經(jīng)營要求，也是我們做人的基本準則。公司致力于打造高品質(zhì)的分光光度計，氣相色譜，原子吸收，食品安全。公司深耕分光光度計，氣相色譜，原子吸收，食品安全，正積蓄著更大的能量，向更廣闊的空間、更寬泛的領(lǐng)域拓展。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1930920.html</p></div></div></div></div></div><div id="qmbdfco" class="page-right twoColRt"><div id="lelnuwd" 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