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class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592155319523/9592810.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="a8fjvxz" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592155319523/9592810.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="jdfhjvx" 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>建材紫外可見(jiàn)分光光度計(jì),紫外可見(jiàn)分光光度計(jì)</p><p><span>***更新：</span>2020-11-01 00:32:01</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="f3kczbn" 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="jif2ibd" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="3jskhyf" class="box"><p><p> 掌握紫外可見(jiàn)光分光光度計(jì)基本工作原理：一定頻率紫外可見(jiàn)光照射所需要分析的目標(biāo)樣品，引起目標(biāo)樣品中價(jià)電子發(fā)生躍遷，從而變現(xiàn)隨著吸收波長(zhǎng)變化而引起光譜變化，形成可供分析數(shù)據(jù)。 </p> <p> 以朗伯-比耳定律(Lambert-beer)為理論基礎(chǔ)，特定波長(zhǎng)吸收中，建材紫外可見(jiàn)分光光度計(jì)，吸收程度正比于試樣成分濃度，因此，可進(jìn)行光譜的定性分析。且根據(jù)吸收與已知濃度標(biāo)樣比較，能進(jìn)行定量分析。 </p> <p> 紫外可見(jiàn)光分光光度計(jì)種類及優(yōu)缺點(diǎn)對(duì)比：傳統(tǒng)機(jī)型：?jiǎn)喂馐鳸V、全程密閉、以光柵進(jìn)行分光，標(biāo)樣和測(cè)試樣品分別測(cè)試，全波段掃描時(shí)間至多2min；比例雙光束UV：?jiǎn)喂馐鳸V，全程密閉、經(jīng)光柵再經(jīng)棱鏡，全程密閉、標(biāo)樣和測(cè)試樣品分別測(cè)試、測(cè)試靈敏度降低，建材紫外可見(jiàn)分光光度計(jì)，全波段分析時(shí)間長(zhǎng)，建材紫外可見(jiàn)分光光度計(jì)。紫外可見(jiàn)分光光度計(jì)應(yīng)安裝在太陽(yáng)不能直接曬到的地方，以免“室光” 太強(qiáng)，影響儀器的使用壽命。建材紫外可見(jiàn)分光光度計(jì)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="建材紫外可見(jiàn)分光光度計(jì),紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592155319523/9592810.png"></div><p> 我們都知道，紫外-可見(jiàn)分光光度計(jì)是實(shí)驗(yàn)室中出鏡率相當(dāng)高的分析儀器。 </p> <p> 那么你的使用情況如何呢？ </p> <p> 你所關(guān)注紫外-可見(jiàn)分光光度計(jì)的哪些性能？ </p> <p> 大家都來(lái)說(shuō)說(shuō)吧！分光光度法是通過(guò)測(cè)定被測(cè)物質(zhì)，在特定波長(zhǎng)處或一定波長(zhǎng)范圍內(nèi)光的吸光度或發(fā)光強(qiáng)度，對(duì)該物質(zhì)進(jìn)行定性和定量分析的方法。紫外-可見(jiàn)分光光度計(jì)是元析儀器引用新型技術(shù)，其功能強(qiáng)大，采用單色器技術(shù)，波長(zhǎng)范圍190-1100nm，是各種涉及水和廢水分析領(lǐng)域的通用儀器，應(yīng)用范圍包括化工分析以及市政和工業(yè)廢水，飲用水，加工過(guò)程用水，地表水，冷卻水和鍋爐補(bǔ)給水等液體的分析。建材紫外可見(jiàn)分光光度計(jì)目前市場(chǎng)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)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="建材紫外可見(jiàn)分光光度計(jì),紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592124342670/5540999.png"></div><p> 光譜范圍紫外可見(jiàn)光譜區(qū)通常指190nm～780nm的波長(zhǎng)范圍，但實(shí)際的分光光度計(jì)設(shè)計(jì)中，經(jīng)常將波長(zhǎng)向長(zhǎng)波方向拓展，進(jìn)入短波近紅外區(qū)。在120多種國(guó)外產(chǎn)品中，有52種波長(zhǎng)≤900nm，其中≤800nm的*11種。而>900nm的有72種，占了多數(shù)。固定光柵型受硅陣列探測(cè)器的限制，1100nm是其波長(zhǎng)的上限。掃描光柵型使用分立光電器件，波長(zhǎng)的擴(kuò)展更為靈活。 </p> <p> 波長(zhǎng)的準(zhǔn)確性：*有16種偏差超過(guò)1nm，其余大多在01～1之間。其中突出的是Varian的Cary100/300，它們?cè)?561nm處的波長(zhǎng)準(zhǔn)確性達(dá)到了002nm的水平。波長(zhǎng)重復(fù)性大于05nm的*7種，01～05nm之間的占了多數(shù)，共有68種，還有相當(dāng)數(shù)量的產(chǎn)品達(dá)到了優(yōu)于01nm的水平。如Agilent的8453(002)、Beckman的DU7000series(005)、Camspec的M400T/PC(005)、GBC的Centra10/20/40(004)、Hitachi的U3010/3310(005)、PerkinElmer的Lambda系列(002～005)、ScincoCO的S-1100/3130/3150(002)、Shimadzu的MS1500(001)和UV1201(003)、Varian的Cary系列(0008～0025)等。雖然從原理上，固定光柵型的設(shè)計(jì)結(jié)構(gòu)固定、簡(jiǎn)單，易于實(shí)現(xiàn)好的波長(zhǎng)準(zhǔn)確性和重復(fù)性，但掃描光柵的設(shè)計(jì)制造工藝已十分成熟。 </p><p style="text-indent:25px"><p>綜合評(píng)價(jià)紫外可見(jiàn)光分光光度計(jì)儀器：根據(jù)使用領(lǐng)域進(jìn)行初步篩選，科研、制藥領(lǐng)域注重選擇光譜可調(diào)的紫外可見(jiàn)光分光光度計(jì)。其中，制藥中藥檢儀器要符合藥典規(guī)定，光譜帶寬要求為2nm以下。<p>重要性能指標(biāo)的考察，包括：光度準(zhǔn)確度，雜散光，光譜帶寬，穩(wěn)定性，噪聲，波長(zhǎng)的準(zhǔn)確度和重復(fù)性是幾個(gè)重要指標(biāo)。各指標(biāo)間相互獨(dú)立有相互影響，需要綜合考量選購(gòu)目標(biāo)紫外可見(jiàn)光分光光度計(jì)。<p>使用前，閱讀儀器使用說(shuō)明書(shū)和做好儀器使用前的工程師培訓(xùn)。使用過(guò)程中，正確操作、認(rèn)真了解儀器指標(biāo)的物理意義和測(cè)試方法以及結(jié)合儀器使用中的相關(guān)設(shè)備的調(diào)試。掌握儀器的基本保養(yǎng)維護(hù)知識(shí)，建立相關(guān)指標(biāo)與分析測(cè)試結(jié)果之間的誤差影響條件，經(jīng)常檢測(cè)和調(diào)試儀器，確保儀器處在合適的工作狀態(tài)。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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="建材紫外可見(jiàn)分光光度計(jì),紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593139440396/4585287.png"></div><p> 眾所周知，紫外可見(jiàn)分光光度計(jì)的光源部需要經(jīng)常更換光源燈（鎢燈或氘燈），一般來(lái)說(shuō)這種工作均由儀器廠家的工程師來(lái)進(jìn)行；如果儀器用戶自己可以掌握這種更換和調(diào)整技術(shù)，既能節(jié)約等待時(shí)間又能節(jié)省維修費(fèi)用，可謂一舉兩得。 </p> <p> 雖然有些用戶也曾經(jīng)自行嘗試過(guò)這種工作，但往往效果不太理想，究其原因則是沒(méi)有掌握要領(lǐng)，他們將這種更換光源燈的工作看做與更換室內(nèi)照明燈泡的性質(zhì)一樣，認(rèn)為只要換上的光源燈被亮即萬(wàn)事大吉；為此，我談?wù)勥@方面的調(diào)整要領(lǐng)。 </p> <p> 一般簡(jiǎn)易型分光光度計(jì)的光源室**設(shè)計(jì)了一支鎢燈來(lái)涵蓋整個(gè)波長(zhǎng)區(qū)域的使用，由于鎢燈的能量在紫外區(qū)很弱，因此、此類儀器在紫外區(qū)的測(cè)量信號(hào)的噪聲較大。 </p> <p> 當(dāng)然、也有**的紫外分光光度計(jì)，同理、光源燈就改用一支氘燈了。 </p> <p> <br /> </p> <p> 為了保障在190～1100nm區(qū)域內(nèi)的高信噪比，目前的儀器均采用兩只光源燈互補(bǔ)使用，即在紫外區(qū)采用氘燈，而在可見(jiàn)區(qū)使用鎢燈，兩只燈的選擇采用旋轉(zhuǎn)光源鏡來(lái)切換。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(tái)之后，已經(jīng)形成了一種能解決大多數(shù)難題的儀器。常見(jiàn)紫外可見(jiàn)分光光度計(jì)怎么樣</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)。建材紫外可見(jiàn)分光光度計(jì)</p><p> 紫外分光光度計(jì)做不準(zhǔn)？比色皿出錯(cuò)了唄。一文了解比色皿的正確使用，配對(duì)，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(dāng)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(zhǎng)范圍在190nm-2500nm（適用于紫外、可見(jiàn)、近紅外光區(qū)）價(jià)格較玻璃比色皿較貴 </p> <p> 玻璃比色皿（G）：適用波長(zhǎng)范圍320nm-2500nm（不適用于紫外光區(qū)），價(jià)格相對(duì)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(fèi)沒(méi)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(shuō)了。建材紫外可見(jiàn)分光光度計(jì)</p><p style="text-indent:25px">上海儀電分析儀器有限公司發(fā)展規(guī)模團(tuán)隊(duì)不斷壯大，現(xiàn)有一支專業(yè)技術(shù)團(tuán)隊(duì)，各種專業(yè)設(shè)備齊全。在儀電分析近多年發(fā)展歷史，公司旗下現(xiàn)有品牌儀電分析,上分等。我公司擁有強(qiáng)大的技術(shù)實(shí)力，多年來(lái)一直專注于儀器儀表、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(jì)算機(jī)軟件開(kāi)發(fā)及銷售，從事貨物進(jìn)出口及技術(shù)進(jìn)出口業(yè)務(wù)?！疽婪毥?jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門批準(zhǔn)后方可開(kāi)展經(jīng)營(yíng)活動(dòng)】?jī)x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(jì)算機(jī)軟件開(kāi)發(fā)及銷售，從事貨物進(jìn)出口及技術(shù)進(jìn)出口業(yè)務(wù)?！疽婪毥?jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門批準(zhǔn)后方可開(kāi)展經(jīng)營(yíng)活動(dòng)】的發(fā)展和創(chuàng)新，打造高指標(biāo)產(chǎn)品和服務(wù)。儀電分析始終以質(zhì)量為發(fā)展，把顧客的滿意作為公司發(fā)展的動(dòng)力，致力于為顧客帶來(lái)***的分光光度計(jì)，氣相色譜，原子吸收，食品安全。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/1791721.html</p></div></div></div></div></div><div id="ildfx7c" class="page-right twoColRt"><div id="wqxeb2t" class="box01 margin10 clearfix"><h3><a 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