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id="82l88jm" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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>專業(yè)紫外可見分光光度計(jì)設(shè)備,紫外可見分光光度計(jì)</p><p><span>***更新：</span>2020-11-08 06:21:21</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="lprebn7" 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(jī): </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="azgy3ov" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="bug87by" class="box"><p><p style="text-indent:25px"><p>紫外可見分光光度計(jì)定量，專業(yè)紫外可見分光光度計(jì)設(shè)備、定性分析需注意的問題<p>重復(fù)測定次數(shù)和波長掃描速度：對吸光度不是很大的樣品，或者狹縫不是很小，這是檢測器檢測的光信號的強(qiáng)度是比較大的，專業(yè)紫外可見分光光度計(jì)設(shè)備，重復(fù)性較好，可選擇較少的重復(fù)次數(shù)。相反，如果樣品吸光度很大，專業(yè)紫外可見分光光度計(jì)設(shè)備，狹縫很小，選擇較大的重復(fù)次數(shù)可獲得更好的結(jié)果。5測定波長間隔：在掃描光譜時(shí)需要選擇，可根據(jù)樣品吸收峰的寬度進(jìn)行選擇，峰寬較大時(shí)，可選擇較大的波長間隔。反之亦反。通常每個(gè)正常的吸收峰應(yīng)該用不少于30個(gè)數(shù)據(jù)點(diǎn)表示出來。光學(xué)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。專業(yè)紫外可見分光光度計(jì)設(shè)備</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="專業(yè)紫外可見分光光度計(jì)設(shè)備,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593980700101/5381945.png"></div><p style="text-indent:25px">紫外分光光度計(jì)檢測器是將光信號轉(zhuǎn)變?yōu)殡娦盘柕难b置。測量吸光度時(shí)，并非直接測量透過吸收池的光強(qiáng)度，而是將光強(qiáng)度轉(zhuǎn)換成電流進(jìn)行測量，這種光電轉(zhuǎn)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(jià)格便宜，但長時(shí)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(yīng)速度快，目前中、高性能分光光度計(jì)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(jì)檢測的一個(gè)重要進(jìn)展。**紫外可見分光光度計(jì)廠家供應(yīng)實(shí)驗(yàn)室研究人員希望省錢購入專門儀器定量核酸、蛋白或者細(xì)菌的生長情況。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="專業(yè)紫外可見分光光度計(jì)設(shè)備,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png"></div><p> 紫外可見分光光度計(jì)的比色皿的洗滌方法 </p> <p> 1分光光度法中比色皿潔凈與否是影響測定準(zhǔn)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(yàn)是：要是你測定溶液是酸，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(jī)物質(zhì)，如果不干凈，就用有機(jī)溶劑，比如酒精等溶液洗。 </p> <p> 2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(shí)又不影響測定。 </p> <p> 2.1分析常用的鉻酸洗液不宜用于洗滌比色皿，這是因?yàn)閹谋壬笤谠撓匆褐杏袝r(shí)會局部發(fā)熱，致使比色皿膠接面裂開而損壞。同時(shí)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> 2.2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(shí)。 </p><p style="text-indent:25px">紫外可見分光光度計(jì)的展望紫外可見分光光度計(jì)雖然是一類有著很長歷史的分析儀器，但每一次吸收了新的技術(shù)成果都使它煥發(fā)出新的活力。掃描光柵型分光光度計(jì)依托成熟的設(shè)計(jì)制造工藝，并結(jié)合計(jì)算機(jī)控制等新的技術(shù)成果，仍有很強(qiáng)的生命力。在很多方面，掃描型產(chǎn)品仍體現(xiàn)了技術(shù)水平。陣列式探測器的產(chǎn)生直接促成了固定光柵分光光度計(jì)的設(shè)計(jì)，使得它在測量地更快、更穩(wěn)定、適應(yīng)性更強(qiáng)的方向邁出了一大步。并且，從今后的發(fā)展來看，儀器的小型化、在線化，測量的現(xiàn)場化、實(shí)時(shí)化將是一大方向。要使分光光度計(jì)走出實(shí)驗(yàn)室，成為一種應(yīng)用更廣，更為普及的測量分析設(shè)備，陣列式探測器以及其它的固態(tài)式設(shè)計(jì)可發(fā)揮重要的作用。光纖也將是其中的一項(xiàng)重要技術(shù)，它已使得紫外可見分光光度計(jì)的使用變得更方便，同時(shí)也使分光光度計(jì)的配置變得更靈活。光纖結(jié)合模塊化設(shè)計(jì)，可能使得分光光度計(jì)可以突破完全固定、靜態(tài)的組成，而變成可以自由搭配，自助式構(gòu)建的儀器。光纖同時(shí)也是實(shí)現(xiàn)在線測量的重要手段。計(jì)算機(jī)技術(shù)的影響將更為增進(jìn)。分光光度計(jì)的自動(dòng)化、智能化是一個(gè)方面。另一方面，軟件已經(jīng)在一定程度上使實(shí)在的儀器接近了虛擬的程序，網(wǎng)絡(luò)和信息技術(shù)的結(jié)合可能帶來進(jìn)一步的影響。自從60年前紫外分光光度計(jì)出現(xiàn)在實(shí)驗(yàn)室的工作臺之后，已經(jīng)形成了一種能解決大多數(shù)難題的儀器。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="專業(yè)紫外可見分光光度計(jì)設(shè)備,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png"></div><p> 雙光束UV：經(jīng)棱鏡分光后通過光柵，加強(qiáng)了靈敏度，同時(shí)測量空白樣品與目標(biāo)樣品的優(yōu)點(diǎn)，全波段分析時(shí)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(jìn)入密閉箱，通過光柵，進(jìn)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(zhǔn)確且空白只需要檢測一次，全波段分析時(shí)間小于1s。 </p> <p> 紫外可見光分光光度計(jì)的體積大小以及外觀美學(xué)性。紫外可見分光光度計(jì)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(hù)、維護(hù)和保養(yǎng)，有利于延長儀器的使用壽命。同時(shí)，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(jì)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(biāo)所決定。采購紫外可見光分光光度計(jì)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。目前市場上有兩類主流紫外分光光度計(jì)產(chǎn)品:掃描光柵式分光光度計(jì)和固定光柵式分光光度計(jì)。高校紫外可見分光光度計(jì)設(shè)備</p><p style="text-indent:25px">紫外分光光度計(jì)的光柵是一系列等寬、等距離的平行狹縫，以光的衍射現(xiàn)象和干涉現(xiàn)象為基礎(chǔ)。專業(yè)紫外可見分光光度計(jì)設(shè)備</p><p> 進(jìn)行單波長測量時(shí)，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(shí)，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(jìn)行多波長校正時(shí)，除盡量滿足單波長測定的波長要求外，還要求多個(gè)組分間的吸收光譜間線性無關(guān)。 </p> <p> 紫外分光光度計(jì)狹縫的大小會影響到儀器的信噪比和標(biāo)準(zhǔn)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(dāng)不在MAX吸收波長位置測定時(shí)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(shí)，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(shí)，很難同時(shí)在所有波長都滿足線性范圍要求，應(yīng)選擇比較小的狹縫。專業(yè)紫外可見分光光度計(jì)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。公司自成立以來，以質(zhì)量為發(fā)展，讓匠心彌散在每個(gè)細(xì)節(jié)，公司旗下分光光度計(jì)，氣相色譜，原子吸收，食品安全深受客戶的喜愛。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠信為本的理念，打造儀器儀表良好品牌。儀電分析立足于全國市場，依托強(qiáng)大的研發(fā)實(shí)力，融合前沿的技術(shù)理念，飛快響應(yīng)客戶的變化需求。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1899410.html</p></div></div></div></div></div><div id="afc8fzq" class="page-right twoColRt"><div id="8zlsugs" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="nhjqc7p" 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