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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>材料紫外可見分光光度計(jì)代理,紫外可見分光光度計(jì)</p><p><span>***更新：</span>2020-11-05 06:22:35</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="moarqwc" 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(hào)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="zh2miul" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="il2lmdu" class="box"><p><p> 紫外分光光度法是根據(jù)物質(zhì)的吸收光譜，來研究物質(zhì)的成分、結(jié)構(gòu)和物質(zhì)間相互作用的有效手段。紫外分光光度計(jì)可以在紫外可見光區(qū)任意選擇不同波長的光。物質(zhì)的吸收光譜就是物質(zhì)中的分子和原子吸收了入射光中的某些特定波長的光能量，相應(yīng)地發(fā)生了分子振動(dòng)能級(jí)躍遷和電子能級(jí)躍遷的結(jié)果。 </p> <p> 環(huán)境中的塵埃和腐蝕性氣體亦可以影響機(jī)械系統(tǒng)的靈活性、降低各種限位開關(guān)、按鍵、光電偶合器的可靠性，也是造成必須學(xué)部件鋁膜銹蝕的原因之一： </p> <p> 紫外分光光度計(jì)儀器使用一定周期后，內(nèi)部會(huì)積累一定量的塵埃，由維修工程師或在工程師指導(dǎo)下定期開啟儀器外罩對(duì)內(nèi)部進(jìn)行除塵工作： </p> <p> 將各發(fā)熱元件的散熱器重新緊固，對(duì)光學(xué)盒的密封窗口進(jìn)行清潔，必要時(shí)對(duì)光路進(jìn)行校準(zhǔn)，對(duì)機(jī)械部分進(jìn)行清潔和必要的潤滑，材料紫外可見分光光度計(jì)代理，材料紫外可見分光光度計(jì)代理?；謴?fù)原狀，再進(jìn)行一些必要的檢測(cè)、調(diào)校與記錄，材料紫外可見分光光度計(jì)代理。分析儀器工作者要懂得儀器的日常維護(hù)和對(duì)主要技術(shù)指標(biāo)的簡(jiǎn)易測(cè)試方法，自己經(jīng)常對(duì)儀器進(jìn)行維護(hù)和測(cè)試，以保證儀器工作在良好狀態(tài)。紫外—可見分光光度計(jì)根據(jù)測(cè)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(jì)定量分析法。材料紫外可見分光光度計(jì)代理</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="材料紫外可見分光光度計(jì)代理,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594849245086/5585171.png"></div><p> 分光光度計(jì)作為一種精密儀器，在運(yùn)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(huì)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(jì)的基本原理和使用說明，并能及時(shí)發(fā)現(xiàn)和排除這些隱患，對(duì)已產(chǎn)生的故障及時(shí)維修才能保證儀器設(shè)備的正常運(yùn)行。 </p> <p> 紫外可見分光光度計(jì)--使用經(jīng)驗(yàn) </p> <p> 若大幅度改變測(cè)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(cè)量。 </p> <p> 指針式儀器在未接通電源時(shí)，電表的指針必須位于零刻度上。若不是這種情況，需進(jìn)行機(jī)械調(diào)零。 </p> <p> 比色皿使用完畢后，請(qǐng)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(dòng)燈泡及反光鏡燈，以免影響光效率。 </p> <p> 1900型等分光光度計(jì)，由于其光電接收裝置為光電倍增管，它本身的特點(diǎn)是放大倍數(shù)大，因而可以用于檢測(cè)微弱光電信號(hào)，而不能用來檢測(cè)強(qiáng)光。否則容易產(chǎn)生信號(hào)漂移，靈敏度下降。 </p> <p> 針對(duì)其上述特點(diǎn)，在維修、使用此類儀器時(shí)應(yīng)注意不讓光電倍增管長時(shí)間暴露于光下，因此在預(yù)熱時(shí)，應(yīng)打開比色皿蓋或使用擋光桿，避免長時(shí)間照射使其性能漂移而導(dǎo)致工作不穩(wěn)。材料紫外可見分光光度計(jì)代理紫外分光光度計(jì)（UV Spectrophotometer）在實(shí)驗(yàn)室長期在分析領(lǐng)域扮演很重要的角色。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="材料紫外可見分光光度計(jì)代理,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593808795839/2949755.png"></div>紫外可見分光光度計(jì)使用中常見問題解析 <p> 在一般分光光度計(jì)的使用說明書上，要求儀器預(yù)熱時(shí)間約20分鐘；若是帶微處理器的分光光度計(jì)，開機(jī)后儀器自動(dòng)進(jìn)入自檢(初始化)狀態(tài)，約需1O分鐘左右。在分光光度計(jì)預(yù)熱這個(gè)環(huán)節(jié)上，很多使用者或多或少存在問題，如開機(jī)只預(yù)熱電路系統(tǒng)(不調(diào)節(jié)波長、打開吸收池暗箱蓋預(yù)熱等)或認(rèn)為初始化過程就是預(yù)熱等等。對(duì)帶微處理器有自檢功能的分光光度計(jì)，開機(jī)后儀器自檢(初始化)結(jié)束后，在測(cè)定窗口上，設(shè)置所需波長值，用一個(gè)吸收池裝上純凈水置于光路上，調(diào)“0000A”后，預(yù)熱儀器，當(dāng)儀器顯示讀數(shù)不再變化后即可進(jìn)行測(cè)定。 </p> <p> 對(duì)于紫外可見分光光度計(jì)，由于有雙光源(鎢燈與氘燈)，為了延長燈的使用壽命，開機(jī)自檢完成后可以關(guān)掉測(cè)定時(shí)不用的光源燈。 </p><p> 如何正確使用752N紫外可見分光光度計(jì) </p> <p> A：在使用紫外可見分光光度計(jì)時(shí)候，設(shè)備儀器使用之前，一定需要能夠把樣品室內(nèi)存放的防潮劑給拿出來，且在設(shè)備正常運(yùn)轉(zhuǎn)檢查時(shí)候也不能開啟樣品室蓋；在檢查時(shí)候需注意比色皿當(dāng)中的液體要能占總體積的百分之六十六到百分之八十比較好，千萬不能讓液體太多以至于液體外泄直接腐蝕儀器設(shè)備。 </p> <p> 當(dāng)然在進(jìn)行正常檢測(cè)時(shí)候，也要能確保比色皿干凈，當(dāng)發(fā)現(xiàn)內(nèi)壁上有液滴就許使用專業(yè)的紙張給擦拭干凈，建議大家千萬不要使用手直接擦拭，以免造成對(duì)手的傷害。 </p> <p> B：在使用紫外可見分光光度計(jì)時(shí)，儀器設(shè)備在正常運(yùn)轉(zhuǎn)的時(shí)候，一定要嚴(yán)禁把液體溶劑給直接放置于儀器的表層上，如果發(fā)現(xiàn)有溶劑液體出現(xiàn)外泄的情況，一定要進(jìn)行及時(shí)的清潔和處理。 </p> <p> C：當(dāng)使用紫外可見分光光度計(jì)檢測(cè)完畢后，還需要能夠及時(shí)把比色皿內(nèi)的液體給妥善處理掉，并還需要能夠使用蒸餾水給徹底清潔干凈，同時(shí)將比色皿進(jìn)行倒置晾干處理；全部工作完成后還需把設(shè)備儀器電源給關(guān)閉，再將防潮劑放入到樣品室內(nèi)并做好防塵處理才好。分光光度計(jì)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="材料紫外可見分光光度計(jì)代理,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593980700101/5381945.png"></div><p> 使用紫外分光光度計(jì)的過程中，經(jīng)常會(huì)遇到儀器因光源達(dá)不到要求，需要進(jìn)行調(diào)修。要求光源燈處不能有空氣流動(dòng)，因?yàn)閱喂馐鴥x器很忌諱空氣快速流動(dòng)而使光源燈的色溫發(fā)生變化。如遇電壓正常而鎢燈不亮?xí)r，就需要更換鎢燈。更換時(shí)，不要用手直接接觸燈泡表面，如果手指摸過，應(yīng)用無水乙醇和C4H10O混合液擦拭干凈，否則通電后指印遇熱不能去除。安裝光源燈后要注意調(diào)整光路。光源燈有兩個(gè)引線頭，安裝時(shí)用導(dǎo)線焊接，主要是防止接觸不良而造成的光源發(fā)光不穩(wěn)現(xiàn)象。在焊接時(shí)防止焊點(diǎn)與燈頭銅皮碰上，裝上燈座使電源短路。燈絲要求平直，如果燈絲彎曲，會(huì)影響光能量。燈絲的位置要與入射狹縫平行并對(duì)準(zhǔn)，上、下、左、右調(diào)節(jié)后緊固螺釘。擰緊燈座的螺紋套，可用鉗子擰緊，一般燈頭盡量往燈座里塞，因?yàn)槎鄶?shù)燈絲離燈頭偏高。調(diào)整燈位置的前后可移動(dòng)整個(gè)燈座架，它下面有三個(gè)固定螺釘，先稍松后，移動(dòng)前后位置再固定。一般調(diào)節(jié)鎢燈的位置時(shí)，將波長調(diào)到580nm處，狹縫調(diào)到MAX，把一張白紙置于比色皿盒邊出口處，觀察白紙上的光斑。若光斑上方左右角均不完整成半圓弧，可能是光源燈高度不對(duì)；光斑左邊或右邊不完整，可調(diào)光源燈底座位置。調(diào)整至白紙上可見明亮、均勻的長方形黃橙色光斑。紫外可見分光光度計(jì)主要由光源系統(tǒng)、單色器系統(tǒng)、樣品室、檢測(cè)系統(tǒng)組成。元素紫外可見分光光度計(jì)多少錢</p><p style="text-indent:25px">現(xiàn)在的許多紫外分光光度計(jì)裝的是“長壽”型燈源，據(jù)說氘燈可達(dá)2000小時(shí)，鎢燈3000小時(shí)。材料紫外可見分光光度計(jì)代理</p><p> 光柵實(shí)現(xiàn)上就是一系列等寬、等距離的平行狹縫，它是利用光的衍射與干涉作用制成的。光柵作為色散元件具有不少獨(dú)特的優(yōu)點(diǎn)，光柵單色器的分辨率比棱鏡單色器的分辨率高，可精確到0.2nm，而且可用的波長范圍也比棱鏡單色器的范圍寬。所以，目前生產(chǎn)的紫外可見分光光度計(jì)大多采用光柵作為色散元件。 </p> <p> 吸收池是用于盛裝待測(cè)液并決定待測(cè)溶液透光液層厚度的器皿，又稱比色皿。吸收池一般為長方體，也有圓形或其它形狀的。其底及兩側(cè)為毛玻璃，另兩面為光學(xué)透光面。根據(jù)光學(xué)透光面的材質(zhì)，吸收池又可分為玻璃吸收池和石英吸收池兩種。玻璃吸收池用于可見光區(qū)測(cè)定，石英吸收池用于紫外光區(qū)的測(cè)定。吸收池的規(guī)格以光程為標(biāo)志。常用的吸收池規(guī)格有0.5cm、1.0cm、2.0cm、3.0cm、5.0cm等。材料紫外可見分光光度計(jì)代理</p><p style="text-indent:25px">上海儀電分析儀器有限公司致力于儀器儀表，以科技創(chuàng)新實(shí)現(xiàn)***管理的追求。儀電分析擁有一支經(jīng)驗(yàn)豐富、技術(shù)創(chuàng)新的專業(yè)研發(fā)團(tuán)隊(duì)，以高度的專注和執(zhí)著為客戶提供分光光度計(jì)，氣相色譜，原子吸收，食品安全。儀電分析始終以本分踏實(shí)的精神和必勝的信念，影響并帶動(dòng)團(tuán)隊(duì)取得成功。儀電分析創(chuàng)始人湯志東，始終關(guān)注客戶，創(chuàng)新科技，竭誠為客戶提供良好的服務(wù)。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1856917.html</p></div></div></div></div></div><div id="dl3wnu7" class="page-right twoColRt"><div id="m2j4p3e" class="box01 margin10 clearfix"><h3><a 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