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class="proBig"><div id="y2izqr7" 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="2oxie79" 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="viulcij" 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>分析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>2020-12-22 06:18:03</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="wz33qcd" 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="q7xokl3" class="page-proshow02"><p class="title">詳細說明</p><div id="q38h7oj" class="box"><p><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> 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，分析紫外可見分光光度計性價比、熒光等比色皿不常用就不在說了，分析紫外可見分光光度計性價比，分析紫外可見分光光度計性價比。 </p> </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玻璃制成的透光面比色皿。 </p> <p> <br /> 紫外分光光度計儀器使用一定周期后，由維修工程師或在工程師指導下定期開啟儀器外罩對內(nèi)部進行除塵工作。分析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="分析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> 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。 </p> <p> 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。常見紫外可見分光光度計生產(chǎn)廠家紫外—可見分光光度計根據(jù)測定波長的范圍可分為可見分光光度定量分析法和紫外分光光度計定量分析法。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="分析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> 紫外可見分光光度計的基本結(jié)構(gòu)紫外可見分光光度計的工作原理是由光源發(fā)出連續(xù)輻射光，經(jīng)單色器按波長大小色散為單色光，單色光照射到吸收池，一部分被樣品溶液吸收，未被吸收的光經(jīng)檢測器的光電管將光強度變化轉(zhuǎn)變?yōu)殡娦盘栕兓?，并?jīng)信號顯示系統(tǒng)調(diào)制放大后，顯示或打印出吸光度A（或透射比T），完成測定。 </p> <p> 鎢燈是常用的可見光光源，它可發(fā)射的波長為325~2500nm的連續(xù)光譜，其中適宜的使用波長范圍為320~1000nm，因此，也可用做近紅外光源。電能將鎢燈加熱到白熾時，發(fā)出的光強度在各波段的分布隨燈絲溫度而變化。燈絲的溫度取決于電源電壓。電源電壓的微小波動都會引起鎢光強度的很大變化。因此必須使用穩(wěn)壓電源供電，鎢燈工作電壓為12V，也可以使用12V的直流電源供電。鎢燈的壽命一般可達10000小時以上。 </p> <p> 目前很多光度計采用鹵鎢燈代替鎢燈，如7230G型、752PLUS型分光光度計等。鹵鎢燈具有較高的發(fā)光效率和較長的使用壽命。 </p><p> 選擇比色皿洗滌液的原則是去污效果好，不損壞比色皿，同時又不影響測定。 </p> <p> 分析常用的鉻酸洗液不宜用于洗滌比色皿，這是因為帶水的比色皿在該洗液中有時會局部發(fā)熱，致使比色皿膠接面裂開而損壞。同時經(jīng)洗液洗滌后的比色皿還很可能殘存微量鉻，其在紫外區(qū)有吸收，因此會影響鉻及其他有關(guān)元素的測定。 </p> <p> 一般主張使用硝酸和過氧化氫(5：1)的混合溶液泡洗，然后用水沖洗干凈。對一般方法難以洗凈的比色皿，還可以采取以下兩種方法。 </p> <p> 先將比色皿侵入含有少量陰離子表面活性劑的碳酸鈉(20克/升)溶液泡洗，經(jīng)水沖洗后，再于過氧化氫和硝酸(5：1)混合溶液中侵泡半小時。 </p> <p> 紫外可見分光光度計的比色皿的洗滌方法 </p> <p> 分光光度法中比色皿潔凈與否是影響測定準確度的因素之一。因此，必須重視選擇正確的洗凈方法。 </p> <p> 俺的經(jīng)驗是：要是你定溶液是酸，如果不干凈，就用弱堿溶液洗，要是你測定溶液是堿，如果不干凈，就用弱酸溶液洗，要是你測定溶液是有機物質(zhì)，如果不干凈，就用有機溶劑，比如酒精等溶液洗。 </p> <p> <br /> 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="分析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/ydfx123/637396593139440396/4585287.png"></div><p> 當你什么都不了解的情況下，只選貴的，準沒錯。在某種程度上，這句話具有一定的適用性。但是，新型儀器一般價格較貴，如果過度放寬儀器預算，而追加經(jīng)費采購不需要的配件也是一種浪費。如何快速簡單的掌握紫外可見分光光度計的特性，從而進行合適的采購定位，小編將所需要的知識點總結(jié)如下。 </p> <p> 認識紫外可見光分光光度計使用范圍。任何一臺儀器都不是解決所有問題的同一把鑰匙。多問自己幾個問題：需要一臺什么樣的儀器，要用它來做什么，分析的樣品的形態(tài)、所需要的測試范圍以及精度要求在哪里等等。理清楚這些，儀器的基本輪廓就畫出來了。 </p> <p> 紫外可見光分光光度計作為一種常規(guī)的實驗室分析儀器，可以常用于無機物、有機物的定性定量分析，所使用的科研領(lǐng)域包括：科研、制藥、化工、環(huán)保、衛(wèi)生等需要分析的關(guān)鍵領(lǐng)域。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。紫外可見分光光度計選擇</p><p style="text-indent:25px">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。分析紫外可見分光光度計性價比</p><p style="text-indent:25px">經(jīng)過幾十年的發(fā)展，我國已經(jīng)成為世界上第二大儀器儀表制造國，儀器儀表產(chǎn)業(yè)形成了一定的規(guī)模，儀器儀表產(chǎn)品也比較豐富。隨著互聯(lián)網(wǎng)的逐步發(fā)展，為分光光度計，氣相色譜，原子吸收，食品安全等產(chǎn)品的傳播提供了一個飛速的平臺。讓儀器儀表行業(yè)從傳統(tǒng)的銷售模式到以互聯(lián)網(wǎng)電子商務為主的營銷方式的轉(zhuǎn)變，促進了儀器儀表行業(yè)與互聯(lián)網(wǎng)的結(jié)合，推動產(chǎn)業(yè)創(chuàng)新發(fā)展。中國儀器儀表行業(yè)目前正處于高速發(fā)展階段，需要與之相適應的儀器儀表、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?！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?！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】產(chǎn)品營銷模式相互配合。從銷售廣義角度來說，儀器儀表也可具有自動操控、報警、信號傳遞和數(shù)據(jù)處理等功能，例如用于工業(yè)生產(chǎn)過程自動操控中的氣動調(diào)節(jié)儀表，和電動調(diào)節(jié)儀表，以及集散型儀表操控系統(tǒng)也皆屬于儀器儀表。分析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?！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?！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，是一家集研發(fā)、設計、生產(chǎn)和銷售為一體的專業(yè)化公司。公司自創(chuàng)立以來，投身于分光光度計，氣相色譜，原子吸收，食品安全，是儀器儀表的主力軍。儀電分析致力于把技術(shù)上的創(chuàng)新展現(xiàn)成對用戶產(chǎn)品上的貼心，為用戶帶來良好體驗。儀電分析始終關(guān)注儀器儀表行業(yè)。滿足市場需求，提高產(chǎn)品價值，是我們前行的力量。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2510245.html</p></div></div></div></div></div><div id="jsjabse" class="page-right twoColRt"><div id="weamyul" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="dh7pr8d" 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" 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