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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(xué)儀器</a>?<a href="http://www.cdcfah.com/cp/third-gxyq_gpygdj/">光譜儀、光度計</a>?實驗室紫外可見分光光度計設(shè)備服務(wù)為先上海儀電分析儀器供應(yīng)</p><div id="enk7trq" class="leftbox clearfix"><h1>實驗室紫外可見分光光度計設(shè)備服務(wù)為先上海儀電分析儀器供應(yīng)</h1><div id="ymo7p3r" class="proBig"><div id="wlxo3p3" 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="s27xri9" 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="rd8h787" 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>實驗室紫外可見分光光度計設(shè)備,紫外可見分光光度計</p><p><span>***更新：</span>2020-11-01 04:19:53</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="imov4ct" 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(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="c2oji2k" class="page-proshow02"><p class="title">詳細說明</p><div id="jikcgs9" class="box"><p><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，實驗室紫外可見分光光度計設(shè)備。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，實驗室紫外可見分光光度計設(shè)備。檢測樣品不密閉，外界光線對其無影響，實驗室紫外可見分光光度計設(shè)備，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）紫外可見分光光度計應(yīng)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。實驗室紫外可見分光光度計設(shè)備</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="實驗室紫外可見分光光度計設(shè)備,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593893024301/8360761.png"></div><p> 關(guān)于吸光度測定重復(fù)性的問題分光光度計在測定過程中，發(fā)現(xiàn)同一個溶液在不同時問里其測定結(jié)果不同，即重復(fù)性不好，其原因是什么?排除測定錯誤因素外，可能原因有：(1)儀器預(yù)熱時間不夠或預(yù)熱方法不對所造成，應(yīng)延長預(yù)熱時間或采用正確的預(yù)熱方法。 </p> <p> (2)光電轉(zhuǎn)換器(如光電管)因長時間使用其光電轉(zhuǎn)換效率發(fā)生了變化導(dǎo)致。這時標準溶液與待測溶液的吸光度都同樣變低，在相對定量時對結(jié)果影響很小。但是對這類儀器，一般建議連續(xù)使用時間不應(yīng)超過3h，若需長時間使用，間歇30min。實驗室紫外可見分光光度計設(shè)備分光光度計是杜包斯克(Duboscq)和奈斯勒(Nessler)等人在1854年將朗伯-比爾定律應(yīng)用于定量分析化學(xué)領(lǐng)域。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="實驗室紫外可見分光光度計設(shè)備,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592155319523/9592810.png"></div>你的眼鏡真的防紫外嗎？紫外分光光度計告訴你 <p> 市場上的眼鏡多種多樣，有的近視沒辦法必須佩戴眼鏡，有的為了美觀，佩戴個眼鏡，還有些工作要求，需要佩戴眼鏡保護眼鏡。 </p> <p> 很多眼鏡都號稱是防紫外線的，這些眼鏡真的防紫外線嗎？ </p> <p> 早期的眼鏡是玻璃的，玻璃的很重，硬度高，現(xiàn)在幾乎被樹脂材料取代了。 </p> <p> 這些眼鏡是不是真的防紫外線呢？我們實驗室的用數(shù)據(jù)來說話，很簡單的方法，只要我們有一臺紫外分光光度計就可以了。 </p> <p> 這里選擇了三款眼鏡，A款是公司要求佩戴的護目鏡，B款是可變色的近視眼鏡，C款為無框的近視眼鏡。 </p> <p> <br /> </p> <p> 在紫外分光光度計，選擇200-400nm波長掃描，間隔1nm就可以了，節(jié)約時間可以設(shè)置為間隔2nm?？諝庾隹瞻讙呙韬?，將各眼鏡放置在比色皿的位置，目的是讓光能穿過眼鏡，再波長掃描。 </p> <p> <br /> </p><p> 紫外可見分光光度計的發(fā)展分光光度法在分析領(lǐng)域中的應(yīng)用已經(jīng)有數(shù)十年的歷史，至今仍是應(yīng)用常用的分析方法之一。隨著分光元器件及分光技術(shù)、檢測器件與檢測技術(shù)、大規(guī)模集成制造技術(shù)等的發(fā)展，以及單片機、微處理器、計算機和DSP技術(shù)的應(yīng)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(shù)的結(jié)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(yīng)用，使儀器的測量速度發(fā)生了質(zhì)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(gòu)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。紫外可見分光光度計是實驗室中出鏡率相當(dāng)高的分析儀器。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="實驗室紫外可見分光光度計設(shè)備,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593808795839/2949755.png"></div><p> 紫外可見分光光度計之比色皿的選擇與使用小技巧 </p> <p> 一直以來都認為比色皿洗滌不干凈會造成很大實驗誤差，才發(fā)現(xiàn)原來比色皿選擇不當(dāng)也能造成不可預(yù)測的誤差。在此，就小結(jié)下有關(guān)如何正確選擇比色皿、比色皿使用注意事項以及比色皿的洗滌方法。 </p> <p> 比色皿透光面是由能夠透過所使用的波長范圍的光的材料制成。在200-350nm工作的比色皿適用于紫外區(qū),必須使用石英或熔熔硅石制成透光面的石英比色皿。(注：熔熔硅石的還真沒見過，只用過石英的)石英比色皿既可用于紫外區(qū)又可用于可見區(qū)，但是價格一般比較貴，所以要根據(jù)使用波長選擇比色皿，如果不用紫外區(qū)的話，用普通玻璃比色皿就行了，一則浪費沒必要，二則，嘿嘿，摔碎了也不心疼，哈哈。而普通硅酸鹽光學(xué)玻璃制成的透光面的比色皿,只能用于350nm至1000nm的可見區(qū)。大部分單機型的分光光度計包含了驅(qū)動儀器運行和管理數(shù)據(jù)的軟件。與PC機一起聯(lián)用，需要從制造商購買軟件。雙光束紫外可見分光光度計性價比</p><p style="text-indent:25px">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。實驗室紫外可見分光光度計設(shè)備</p><p> 雙光束UV：經(jīng)棱鏡分光后通過光柵，加強了靈敏度，同時測量空白樣品與目標樣品的優(yōu)點，全波段分析時間長。全波段UV：樣品與空白樣品可以暴露在空氣中，照射樣品后，進入密閉箱，通過光柵，進入DAD檢測器檢測。檢測樣品不需要密閉，外界光線對測試無影響，使用方便準確且空白只需要檢測一次，全波段分析時間小于1s。 </p> <p> 紫外可見光分光光度計的體積大小以及外觀美學(xué)性。紫外可見分光光度計的儀器體積大小，會牽扯儀器所需要的擺放位置以及儀器使用的方便程度。 </p> <p> 儀器的外形美觀，給人以大氣、上檔次、舒適、新鮮的感覺。首先，會讓使用儀器者對儀器分外的愛護、維護和保養(yǎng)，有利于延長儀器的使用壽命。同時，也會讓儀器使用者的工作環(huán)境更舒適、優(yōu)美，也有利于提高工作效率。 </p> <p> 紫外可見光分光光度計儀器使用范圍。紫外可見光分光光度的使用范圍是有儀器的性能指標所決定。采購紫外可見光分光光度計根據(jù)測試樣品的具體要求，參考儀器的使用范圍，滿足即可，不必苛求。當(dāng)然，土豪可以忽略。實驗室紫外可見分光光度計設(shè)備</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，擁有一支專業(yè)的技術(shù)團隊。在儀電分析近多年發(fā)展歷史，公司旗下現(xiàn)有品牌儀電分析,上分等。公司以用心服務(wù)為重點價值，希望通過我們的專業(yè)水平和不懈努力，將儀器儀表、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】等業(yè)務(wù)進行到底。儀電分析始終以質(zhì)量為發(fā)展，把顧客的滿意作為公司發(fā)展的動力，致力于為顧客帶來***的分光光度計，氣相色譜，原子吸收，食品安全。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1795997.html</p></div></div></div></div></div><div id="sr8dxj4" class="page-right twoColRt"><div id="p2u3ksw" class="box01 margin10 clearfix"><h3><a 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