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href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a 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>?常見紫外可見分光光度計(jì)怎么樣歡迎來電上海儀電分析儀器供應(yīng)</p><div id="rvt7x9v" class="leftbox clearfix"><h1>常見紫外可見分光光度計(jì)怎么樣歡迎來電上海儀電分析儀器供應(yīng)</h1><div id="dbzfdzf" class="proBig"><div id="7bdt9px" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="59zx5n7" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="zlhfl97" 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(guān)鍵詞：</span>常見紫外可見分光光度計(jì)怎么樣,紫外可見分光光度計(jì)</p><p><span>***更新：</span>2020-11-14 09:24:50</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="njxxthn" 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="n995dtz" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="pvrp77d" class="box"><p><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)樣品中價電子發(fā)生躍遷，從而變現(xiàn)隨著吸收波長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，常見紫外可見分光光度計(jì)怎么樣。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)對比：傳統(tǒng)機(jī)型：單光束UV、全程密閉、以光柵進(jìn)行分光，標(biāo)樣和測試樣品分別測試，全波段掃描時間至多2min；比例雙光束UV：單光束UV，全程密閉，常見紫外可見分光光度計(jì)怎么樣、經(jīng)光柵再經(jīng)棱鏡，全程密閉、標(biāo)樣和測試樣品分別測試、測試靈敏度降低，常見紫外可見分光光度計(jì)怎么樣，全波段分析時間長。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、檢測系統(tǒng)組成。常見紫外可見分光光度計(jì)怎么樣</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常見紫外可見分光光度計(jì)怎么樣,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png"></div><p> 進(jìn)行單波長測量時，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，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，除盡量滿足單波長測定的波長要求外，還要求多個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，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，很難同時在所有波長都滿足線性范圍要求，應(yīng)選擇比較小的狹縫。環(huán)保紫外可見分光光度計(jì)廠家供應(yīng)分光光度計(jì)的氘燈和汞燈是在不同波長的時候有程序控制自動變換的，一般是在360nm處變換。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常見紫外可見分光光度計(jì)怎么樣,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594919157259/9098588.png"></div><p> 可見分光光度計(jì)是一種常規(guī)的實(shí)驗(yàn)室分析儀器。可常用于無機(jī)物、有機(jī)物的定性、定量分析中，在科研、制藥、化工、環(huán)保、衛(wèi)生、防疫等領(lǐng)域中發(fā)揮重要的作用。有人說，紫外、可見分光光度計(jì)就是一把尺子一個天平，凡是有化驗(yàn)、分析的地方都能用到它。那么，如何評價一臺紫外、可見分光光度計(jì)的優(yōu)劣呢? </p> <p> 要考察它的外觀。試想，一臺外型呆板、做工粗糙的儀器，怎么可能是一臺先進(jìn)的儀器呢? </p> <p> 我們探討一下會對儀器的使用有很大影響的幾個重要指標(biāo) </p> <p> <p> 1、光度準(zhǔn)確度 </p> <p> 2、雜散光 </p> <p> 3、光譜帶寬 </p> <p> 4、穩(wěn)定性 </p> <p> 5、噪聲 </p> <p> 6、波長的準(zhǔn)確度和重復(fù)性 </p> <p> <br /> </p> </p><p> 原子吸收分光光度計(jì)與紫外可見分光光度計(jì)的區(qū)別介紹 </p> <p> 原理： </p> <p> 原子吸收觀察的是構(gòu)成物質(zhì)的元素（原子）中的電子在原子軌道中的躍遷，屬于原子吸收. </p> <p> 紫外可見光吸收觀察的是構(gòu)成物質(zhì)的分子中的電子在分子軌道中的躍遷，屬于分子吸收. </p> <p> 能量: </p> <p> 兩者有所同，又有所不同。定量分析的原則同，而測量所需的光能量不同： </p> <p> 原子吸收為X射線，能量大，可激發(fā)電子從低的原子軌道向高的原子軌道躍遷. </p> <p> 紫外可見吸收為紫外光及可見光，能量小，只能激發(fā)電子從分子軌道向MAX低（或次低）的空的分子軌道躍遷。 </p> <p> 通俗的說，原子吸收分光光度計(jì)是用較高的溫度來燃燒分子，使之原子化（變?yōu)榛鶓B(tài)原子），再通過特征輻射，把基態(tài)原子激發(fā)，并吸收能量，通過這個能量差（透過率）來計(jì)算出濃度。而紫外—可見分光光度計(jì)是通過顯色劑（一種能和我們被測元素產(chǎn)生絡(luò)合反應(yīng)的分子），與我們的被測元素產(chǎn)生反應(yīng)，并且反應(yīng)物分子帶有特定的顏色，經(jīng)過分子吸收氘燈（紫外區(qū)）或鎢燈（可見區(qū)）的照射，吸收燈發(fā)射的能量，通過能量差（透過率）來計(jì)算出濃度。在操作紫外可見分光光度計(jì)時，操作人員需要留意一下機(jī)器的干燥劑。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常見紫外可見分光光度計(jì)怎么樣,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593808795839/2949755.png"></div>你的眼鏡真的防紫外嗎？紫外分光光度計(jì)告訴你 <p> 市場上的眼鏡多種多樣，有的近視沒辦法必須佩戴眼鏡，有的為了美觀，佩戴個眼鏡，還有些工作要求，需要佩戴眼鏡保護(hù)眼鏡。 </p> <p> 很多眼鏡都號稱是防紫外線的，這些眼鏡真的防紫外線嗎？ </p> <p> 早期的眼鏡是玻璃的，玻璃的很重，硬度高，現(xiàn)在幾乎被樹脂材料取代了。 </p> <p> 這些眼鏡是不是真的防紫外線呢？我們實(shí)驗(yàn)室的用數(shù)據(jù)來說話，很簡單的方法，只要我們有一臺紫外分光光度計(jì)就可以了。 </p> <p> 這里選擇了三款眼鏡，A款是公司要求佩戴的護(hù)目鏡，B款是可變色的近視眼鏡，C款為無框的近視眼鏡。 </p> <p> <br /> </p> <p> 在紫外分光光度計(jì)，選擇200-400nm波長掃描，間隔1nm就可以了，節(jié)約時間可以設(shè)置為間隔2nm。空氣做空白掃描后，將各眼鏡放置在比色皿的位置，目的是讓光能穿過眼鏡，再波長掃描。 </p> <p> <br /> 分光光度法可以得出一些化學(xué)反應(yīng)速度常數(shù)，并從兩個或兩個以上溫度條件下得到的速度數(shù)據(jù)，得出反應(yīng)活化能。暗箱紫外可見分光光度計(jì)廠家</p><p style="text-indent:25px">紫外分光光度計(jì)可用于藥品的鑒別、純度檢查及含量測定，既可以定性分析，又可以定量分析。常見紫外可見分光光度計(jì)怎么樣</p><p> 752N紫外可見分光光度計(jì)產(chǎn)品介紹 </p> <p> 該產(chǎn)品采用微處理機(jī)控制技術(shù)在紫外可見光譜區(qū)域內(nèi)對物質(zhì)作定性、定量分析，是常規(guī)實(shí)驗(yàn)室必備的多用途分析儀器。 </p> <p> 主要特點(diǎn)： </p> <p> ●全息閃耀光柵單色器，具有波長精度高，單色性好，雜散光低等優(yōu)點(diǎn)。 </p> <p> ●全新液晶屏顯示，讀數(shù)清晰自然。 </p> <p> ●采用微機(jī)測量系統(tǒng)，T-A轉(zhuǎn)換精度高，并有自動調(diào)0％T和調(diào)100％T，濃度因子設(shè)定、濃度直讀。 </p> <p> ●測量讀數(shù)準(zhǔn)確性高，重現(xiàn)性好和穩(wěn)定性佳。 </p> <p> ●自動光門技術(shù)，操作便捷。 </p> <p> 選配： </p> <p> ●熱敏繪圖打印機(jī) </p> <p> ●**光譜軟件 </p> <p> ●5cm或10cm比色皿架常見紫外可見分光光度計(jì)怎么樣</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/1987963.html</p></div></div></div></div></div><div id="jzxn5hl" class="page-right twoColRt"><div id="7p9nx77" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="jxvb3pn" 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) 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