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<meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center id="qgqbi"></center></dfn><sub id="qgqbi"></sub><u 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id="4yo24wk" class="proBig"><div id="oukiqms" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594919157259/9098588.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="wcioec4" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594919157259/9098588.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="o2mkkao" 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>直讀紫外可見分光光度計對比,紫外可見分光光度計</p><p><span>***更新：</span>2020-11-13 10:28:18</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="kgke2q2" 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="24wusge" class="page-proshow02"><p class="title">詳細說明</p><div id="gemcag2" class="box"><p><p> 分光光度計作為一種精密儀器，直讀紫外可見分光光度計對比，在運行工作過程中由于工作環(huán)境，直讀紫外可見分光光度計對比、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，直讀紫外可見分光光度計對比，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。在水質(zhì)的常規(guī)監(jiān)測中，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。直讀紫外可見分光光度計對比</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="直讀紫外可見分光光度計對比,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594919157259/9098588.png"></div><p> 紫外分光光度計做不準？比色皿出錯了唄。一文了解比色皿的正確使用，配對，洗滌。 </p> <p> 比色皿（cuvette）是一種用于光譜分析的裝備儀器。常用的主要是由石英粉燒制的石英比色皿和普通硅酸鹽光學(xué)玻璃制成的透光面比色皿。 </p> <p> 當然也有微量、半微量、熒光等比色皿出現(xiàn)。 </p> <p> 石英比色皿（Q/S）：適用波長范圍在190nm-2500nm（適用于紫外、可見、近紅外光區(qū)）價格較玻璃比色皿較貴 </p> <p> 玻璃比色皿（G）：適用波長范圍320nm-2500nm（不適用于紫外光區(qū)），價格相對便宜 </p> <p> 由上述數(shù)據(jù)可以看出石英比色皿完全可以代替玻璃比色皿使用，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。至于微量、半微量、熒光等比色皿不常用就不在說了。工廠紫外可見分光光度計銷售廠家紫外可見分光光度計主要由光源系統(tǒng)、單色器系統(tǒng)、樣品室、檢測系統(tǒng)組成。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="直讀紫外可見分光光度計對比,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592155319523/9592810.png"></div><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(xué)、化學(xué)、生物學(xué)、醫(yī)學(xué)、材料學(xué)、環(huán)境科學(xué)等科學(xué)研究領(lǐng)域，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(yīng)用。 </p> <p> 紫外可見分光光度計校正 </p> <p> 開機預(yù)熱10分鐘足矣； </p> <p> 放入黑塊和標樣（沒有的自己配），關(guān)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(yīng)先預(yù)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。 </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。當然，土豪可以忽略。紫外-可見分光光度法是利用某些物質(zhì)的分子吸收200--800nm光譜區(qū)的輻射來進行分析測定的方法。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="直讀紫外可見分光光度計對比,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593980700101/5381945.png"></div><p> 進行單波長測量時，需要考慮朗伯比爾定律對入射光單色性的要求和測定靈敏度的要求。沒有干擾時，一般選擇在吸收峰的MAX吸收波長位置處，如果有干擾，選擇在沒有干擾且吸光度變化較平緩的位置。進行多波長校正時，除盡量滿足單波長測定的波長要求外，還要求多個組分間的吸收光譜間線性無關(guān)。 </p> <p> 紫外分光光度計狹縫的大小會影響到儀器的信噪比和標準曲線的線性范圍。狹縫過大，通常會使線性范圍變小，特別是當不在MAX吸收波長位置測定時更是如此。狹縫過小，信噪比變差，基線平直度和測量數(shù)據(jù)的重復(fù)性會變差。此外，還需要考慮樣品吸收峰寬度的影響。通常單波長測定時，一般選擇在MAX吸收波長位置，線性范圍容易滿足，可選擇較寬的狹縫（1~2nm）多波長測定時，很難同時在所有波長都滿足線性范圍要求，應(yīng)選擇比較小的狹縫。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?；ぷ贤饪梢姺止夤舛扔嬤x擇</p><p style="text-indent:25px">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。直讀紫外可見分光光度計對比</p><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> 紫外可見分光光度計--使用經(jīng)驗 </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%”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。 </p> <p> 1900型等分光光度計，由于其光電接收裝置為光電倍增管，它本身的特點是放大倍數(shù)大，因而可以用于檢測微弱光電信號，而不能用來檢測強光。否則容易產(chǎn)生信號漂移，靈敏度下降。 </p> <p> 針對其上述特點，在維修、使用此類儀器時應(yīng)注意不讓光電倍增管長時間暴露于光下，因此在預(yù)熱時，應(yīng)打開比色皿蓋或使用擋光桿，避免長時間照射使其性能漂移而導(dǎo)致工作不穩(wěn)。直讀紫外可見分光光度計對比</p><p style="text-indent:25px">上海儀電分析儀器有限公司總部位于徐塘路88號7幢4層、9幢，是一家儀器儀表、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】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】的公司。儀電分析作為儀器儀表、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)。【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】的企業(yè)之一，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。儀電分析始終以本分踏實的精神和必勝的信念，影響并帶動團隊取得成功。儀電分析始終關(guān)注自身，在風云變化的時代，對自身的建設(shè)毫不懈怠，高度的專注與執(zhí)著使儀電分析在行業(yè)的從容而自信。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1974384.html</p></div></div></div></div></div><div id="qeqg4ay" class="page-right twoColRt"><div id="2caq2uc" class="box01 margin10 clearfix"><h3><a 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