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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_gxyq/">光學(xué)儀器</a>?<a href="http://www.cdcfah.com/cp/third-gxyq_gpygdj/">光譜儀、光度計(jì)</a>?國(guó)產(chǎn)紫外可見分光光度計(jì)排行來電咨詢上海儀電分析儀器供應(yīng)</p><div id="rjfzgnu" class="leftbox clearfix"><h1>國(guó)產(chǎn)紫外可見分光光度計(jì)排行來電咨詢上海儀電分析儀器供應(yīng)</h1><div id="fcd2ojf" class="proBig"><div id="eces8s4" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="ems8sok" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="qeaoxsi" 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>國(guó)產(chǎn)紫外可見分光光度計(jì)排行,紫外可見分光光度計(jì)</p><p><span>***更新：</span>2020-11-10 08:25:13</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="aypgneg" 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="qjfrd2i" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="fdpmyfb" class="box"><p><p style="text-indent:25px">使用紫外可見分光光度計(jì)進(jìn)行定量和定性分析需注意以下一些問題：1吸光度讀數(shù)范圍：吸光度測(cè)量誤差在透過率過大或過小時(shí)都會(huì)變大，為了滿足定量分析的誤差要求（<5%），在定量分析時(shí)要求吸光度應(yīng)在一定的范圍內(nèi)，這個(gè)范圍的具體值與儀器性能有關(guān)，主要是與紫外可見分光光度計(jì)檢測(cè)系統(tǒng)噪聲大小有關(guān)，但通常都在0.1~1.0范圍內(nèi)，如果儀器的檔次更低，則范圍更窄。根據(jù)朗伯比爾定律，國(guó)產(chǎn)紫外可見分光光度計(jì)排行，影響吸光度大小的因素主要是樣品摩爾吸光系數(shù)，濃度和比色皿光程。實(shí)驗(yàn)中吸光度過大的樣品可通過稀釋樣品使吸光度到所需范圍內(nèi)，國(guó)產(chǎn)紫外可見分光光度計(jì)排行。如果樣品不能稀釋，可以改用光程較小的比色皿減小吸光度，國(guó)產(chǎn)紫外可見分光光度計(jì)排行。吸光度過小的樣品可使用光程較大的比色皿以增大吸光度。分光光度計(jì)的鎢燈壽命無法延長(zhǎng)，氘燈如果不用的時(shí)候，可以關(guān)閉，開機(jī)要預(yù)熱時(shí)間。國(guó)產(chǎn)紫外可見分光光度計(jì)排行</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國(guó)產(chǎn)紫外可見分光光度計(jì)排行,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png"></div><p style="text-indent:25px">關(guān)于波長(zhǎng)準(zhǔn)確度的檢查與校正日常在使用分光光度計(jì)時(shí)，是否要經(jīng)常進(jìn)行儀器波長(zhǎng)準(zhǔn)確度的檢查?答案是否定的。當(dāng)在日常測(cè)定中發(fā)現(xiàn)儀器測(cè)定靈敏度下降，這時(shí)才應(yīng)進(jìn)行波長(zhǎng)準(zhǔn)確度的檢查，簡(jiǎn)易的檢查方法(粗檢)是：儀器開機(jī)后，調(diào)節(jié)波長(zhǎng)為580nm，在吸收池座的通光道中插入一張白色卡片紙，若能觀察到一長(zhǎng)方形的黃色光斑，說明波長(zhǎng)準(zhǔn)確度屬正常范圍，否則就應(yīng)進(jìn)行波長(zhǎng)校正。當(dāng)儀器經(jīng)過長(zhǎng)途搬運(yùn)、受過機(jī)械振動(dòng)或更換光源燈泡后，必須進(jìn)行波長(zhǎng)準(zhǔn)確度的檢查與校正。粗檢同上，其校正方法有：干涉濾光片或鐠釹濾光片校正法、利用氘燈的特征發(fā)射線校正法。具體步驟可參考儀器使用說明書。學(xué)校紫外可見分光光度計(jì)差價(jià)在分光光度計(jì)的使用或檢定中,透射比(吸光度)的準(zhǔn)確度直接關(guān)系到所測(cè)數(shù)據(jù)的可信性及科學(xué)性。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國(guó)產(chǎn)紫外可見分光光度計(jì)排行,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594919157259/9098588.png"></div><p> 光學(xué)構(gòu)造（OPTICAL CONFIGURATION）一般來說，紫外光分光光度計(jì)分為單光束和雙光束兩類。顧名思義，單光束型主要是依賴單束光進(jìn)行測(cè)量。一束給定波長(zhǎng)的光通過對(duì)照物，然后再通過實(shí)際樣品溶液，就能得到吸光結(jié)果。 </p> <p> 雙光束型則是通過一個(gè)斬光輪（mirrored chopper wheel）將一束光分成兩束，分別測(cè)量對(duì)照樣品和實(shí)際樣品?？蒑IN光漂移（lamp drift）和減少測(cè)量時(shí)間。一些雙光型光度計(jì)不利用斬光輪，而是利用一種光束分光器來代替，將一束光分成兩束平行的光然后同時(shí)測(cè)量對(duì)照樣品和目的樣品。因?yàn)樵黾恿藴y(cè)量的速度，所以雙光束分光光度計(jì)在測(cè)量一些溶液隨時(shí)間動(dòng)態(tài)變化的研究中大有用處。 </p><p> 當(dāng)你什么都不了解的情況下，只選貴的，準(zhǔn)沒錯(cuò)。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(jià)格較貴，如果過度放寬儀器預(yù)算，而追加經(jīng)費(fèi)采購(gòu)不需要的配件也是一種浪費(fèi)。如何快速簡(jiǎn)單的掌握紫外可見分光光度計(jì)的特性，從而進(jìn)行合適的采購(gòu)定位，小編將所需要的知識(shí)點(diǎn)總結(jié)如下。 </p> <p> 認(rèn)識(shí)紫外可見光分光光度計(jì)使用范圍。任何一臺(tái)儀器都不是解決所有問題的同一把鑰匙。多問自己幾個(gè)問題：需要一臺(tái)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(cè)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(jì)作為一種常規(guī)的實(shí)驗(yàn)室分析儀器，可以常用于無機(jī)物、有機(jī)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(jì)是實(shí)驗(yàn)室中出鏡率相當(dāng)高的分析儀器。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國(guó)產(chǎn)紫外可見分光光度計(jì)排行,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592216930546/1658567.png"></div><p> 掌握紫外可見光分光光度計(jì)基本工作原理：一定頻率紫外可見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，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，全波段分析時(shí)間長(zhǎng)。在水質(zhì)的常規(guī)監(jiān)測(cè)中，紫外可見分光光度法占有較大的比重，待測(cè)物的濃度和干擾物的濃度差別很大。飼料紫外可見分光光度計(jì)性價(jià)比</p><p style="text-indent:25px">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。國(guó)產(chǎn)紫外可見分光光度計(jì)排行</p><p> 定性定量。利用特定的吸收峰，快速對(duì)待測(cè)樣品進(jìn)行定性和定量分析。如聚六亞甲基雙胍鹽酸鹽的檢測(cè)。利用雙波長(zhǎng)，以很快的速度辨別是單胍還是雙胍，并進(jìn)行粗略定量。這是液相色譜無論如何也做不到的。 </p> <p> 測(cè)定透過率。透光率是一個(gè)物理詞匯，是表示光線透過介質(zhì)的的能力，是透過透明或半透明物體的光通量與其入射光通量的百分率。吸光度與透過率的換算公式 </p> <p> 透過率對(duì)于某些原料檢測(cè)是非常實(shí)用的，可對(duì)此類原料品質(zhì)進(jìn)行總體把控。 </p> <p> 雜質(zhì)的檢測(cè)。通過前處理將雜質(zhì)與主成分分離后，進(jìn)行紫外分光光度測(cè)定，可很快得到該雜質(zhì)的含量。以桑普實(shí)驗(yàn)室這十幾年對(duì)苯氧乙醇中雜質(zhì)苯酚的測(cè)定方法改進(jìn)過程為例： </p> <p> 之后建立了4-氨基安替比林比色法，可實(shí)現(xiàn)對(duì)苯氧乙醇含量20、40、60、80、100ppm的區(qū)分；紫外分光光度法 </p> <p> 期間同時(shí)采用EP中紫外分光光度法，并將其進(jìn)行適當(dāng)改進(jìn)，作為修訂后的企標(biāo)。該方法便利快速，可實(shí)現(xiàn)50ppm以上的定量檢測(cè)。HPLC-DAD </p> <p> 近兩年，桑普對(duì)產(chǎn)品品質(zhì)把控更嚴(yán)格，希望能實(shí)現(xiàn)幾個(gè)ppm的定量檢測(cè)。所以采用了HPLC-DAD作為企標(biāo)對(duì)其檢測(cè)。國(guó)產(chǎn)紫外可見分光光度計(jì)排行</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，是一家生產(chǎn)型的公司。公司業(yè)務(wù)涵蓋分光光度計(jì)，氣相色譜，原子吸收，食品安全等，價(jià)格合理，品質(zhì)有保證。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠(chéng)信為本的理念，打造儀器儀表良好品牌。儀電分析秉承“客戶為尊、服務(wù)為榮、創(chuàng)意為先、技術(shù)為實(shí)”的經(jīng)營(yíng)理念，全力打造公司的重點(diǎn)競(jìng)爭(zhēng)力。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1930191.html</p></div></div></div></div></div><div id="er38egc" class="page-right twoColRt"><div id="3stahxz" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="b7hvcjv" 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(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="stoamiy" class="recomPic likePro"><a 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