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href="http://www.cdcfah.com/cp/first-_yiqiyibiao/">儀器儀表</a>?<a href="http://www.cdcfah.com/cp/second-yiqiyibiao_fenxiyiqi/">分析儀器</a>?<a href="http://www.cdcfah.com/cp/third-fenxiyiqi_zwfxy/">紫外分析儀</a>?專業(yè)紫外可見分光光度計現(xiàn)貨誠信互利上海儀電分析儀器供應</p><div id="quwwy7n" class="leftbox clearfix"><h1>專業(yè)紫外可見分光光度計現(xiàn)貨誠信互利上海儀電分析儀器供應</h1><div id="j3243tq" class="proBig"><div id="blxu8v8" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593091764635/4502162.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="nmj8rdp" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593091764635/4502162.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="bam7iv7" 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)品關鍵詞：</span>專業(yè)紫外可見分光光度計現(xiàn)貨,紫外可見分光光度計</p><p><span>***更新：</span>2021-01-24 00:23:36</p><p><span id="click" >瀏覽次數(shù)：4次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="knurdxj" 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="jsp8vs8" class="page-proshow02"><p class="title">詳細說明</p><div id="yroq7cr" class="box"><p><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，專業(yè)紫外可見分光光度計現(xiàn)貨、有機物的定性定量分析，所使用的科研領域包括：科研，專業(yè)紫外可見分光光度計現(xiàn)貨、制藥、化工、環(huán)保、衛(wèi)生等需要分析的關鍵領域，專業(yè)紫外可見分光光度計現(xiàn)貨。波長范圍越寬的價格越貴;波長準確度及雜散光參數(shù)的數(shù)值越低，表示性能越好。專業(yè)紫外可見分光光度計現(xiàn)貨</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現(xiàn)貨,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593091764635/4502162.png"></div><p style="text-indent:25px">計算機技術的影響將更為增進。分光光度計的自動化、智能化是一個方面。另一方面，軟件已經(jīng)在一定程度上使實在的儀器接近了虛擬的程序，網(wǎng)絡和信息技術的結合可能帶來進一步的影響。紫外可見分光光度計的展望紫外可見分光光度計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成果都使它煥發(fā)出新的活力。掃描光柵型分光光度計依托成熟的設計制造工藝，并結合計算機控制等新的技術成果，仍有很強的生命力。在很多方面，掃描型產(chǎn)品仍體現(xiàn)了技術水平。陣列式探測器的產(chǎn)生直接促成了固定光柵分光光度計的設計，使得它在測量地更快、更穩(wěn)定、適應性更強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、實時化將是一大方向。要使分光光度計走出實驗室，成為一種應用更廣，更為普及的測量分析設備，陣列式探測器以及其它的固態(tài)式設計可發(fā)揮重要的作用。光纖也將是其中的一項重要技術，它已使得紫外可見分光光度計的使用變得更方便，同時也使分光光度計的配置變得更靈活。光纖結合模塊化設計，可能使得分光光度計可以突破完全固定、靜態(tài)的組成，而變成可以自由搭配，自助式構建的儀器。光纖同時也是實現(xiàn)在線測量的重要手段。建材紫外可見分光光度計廠家紫外可見分光光度計即每種待測元素都要有一個能發(fā)射特定波長譜線的光源。</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現(xiàn)貨,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592216930546/1658567.png"></div><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 /> </p><p style="text-indent:25px">與國外產(chǎn)品有比較明顯的差距。國內(nèi)產(chǎn)品的光度重復性基本在0.1～0.3%T范圍，同樣在吸光度1A處換算，數(shù)值為0.004～0.013A，也存在距離。比較國外與國內(nèi)產(chǎn)品的雜散光的典型值，兩者幾乎相差了一個數(shù)量級。但是已有一些較新研發(fā)的產(chǎn)品，可以達到國外產(chǎn)品的普遍水準。雜散光：典型值是0.01～0.05%T，在國外的產(chǎn)品中有65種產(chǎn)品的雜散光指標在這一范圍中。雜散光超過0.05%T的產(chǎn)品有31種，小于0.01%T的產(chǎn)品有19種。。從其光學設計看，都采用了雙單色器。與掃描光柵型產(chǎn)品相比，固定光柵的分光光度計少了出射狹縫，實現(xiàn)低雜散光的難度更大。從性能指標來看，范圍是0.01～1%T。26種固定光柵型產(chǎn)品中雜散光在0.01～0.05%T之間的有13種，也已達到半數(shù)，但是能夠低于0.01%T的很少。波長準確性，國外的典型水平是0.1～1nm。國內(nèi)產(chǎn)品中，處于此范圍的有16種，基本達到同一水平，但沒有優(yōu)于0.1nm的產(chǎn)品。國內(nèi)產(chǎn)品的光度準確性大多以透過率表示，水平比較接近，均在0.3～0.5%T之間。在10%T處，也就是吸光度為1A處，將光度準確性以吸光度表示，則數(shù)值為0.013～0.021A。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、結構和物質(zhì)間相互作用的有效手段。</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現(xiàn)貨,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png"></div><p> 紫外分光光度計--注意事項 </p> <p> 1．該儀器應放在干燥的房間內(nèi)，使用時放置在堅固平穩(wěn)的工作臺上，室內(nèi)照明不宜太強。熱天時不能用電扇直接向儀器吹風，防止燈泡燈絲發(fā)亮不穩(wěn)定。 </p> <p> 2．使用本儀器前，使用者應該首先了解本儀器的結構和工作原理，以及各個操縱旋鈕之功能。在未按通電源之前，應該對儀器的安全性能進行檢查，電源接線應牢固，通電也要良好，各個調(diào)節(jié)旋鈕的起始位置應該正確，然后再按通電源開關。 </p> <p> 3．在儀器尚未接通電源時，電表指針必須于“0”刻線上，若不是這種情況，則可以用電表上的校正螺絲進行調(diào)節(jié)。紫外分光光度計（UV Spectrophotometer）在實驗室長期在分析領域扮演很重要的角色。甲醇紫外可見分光光度計比較</p><p style="text-indent:25px">現(xiàn)在的許多紫外分光光度計裝的是“長壽”型燈源，據(jù)說氘燈可達2000小時，鎢燈3000小時。專業(yè)紫外可見分光光度計現(xiàn)貨</p><p> 吸收池是用于盛裝待測液并決定待測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。其底及兩側為毛玻璃，另兩面為光學透光面。根據(jù)光學透光面的材質(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)測定，石英吸收池用于紫外光區(qū)的測定。吸收池的規(guī)格以光程為標志。常用的吸收池規(guī)格有0.5cm、1.0cm、2.0cm、3.0cm、5.0cm等。光柵實現(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特的優(yōu)點，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大多采用光柵作為色散元件。專業(yè)紫外可見分光光度計現(xiàn)貨</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2978377.html</p></div></div></div></div></div><div id="gfbnu3v" class="page-right 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