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class="button">聯(lián)系我們</a></div></div><div id="pt7x832" 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="psjbs8n" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="smdk2jf" class="box"><p>你的眼鏡真的防紫外嗎？紫外分光光度計(jì)告訴你 <p> 市場(chǎng)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(gè)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(hào)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，教學(xué)紫外可見分光光度計(jì)排行，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(jiǎn)單的方法，只要我們有一臺(tái)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，教學(xué)紫外可見分光光度計(jì)排行，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(shí)間可以設(shè)置為間隔2nm，教學(xué)紫外可見分光光度計(jì)排行。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。教學(xué)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="教學(xué)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/ydfx123/637396593980700101/5381945.png"></div><p> 紫外可見分光光度計(jì)是一類很重要的實(shí)驗(yàn)室分析儀器，無論在物理學(xué)、化學(xué)、生物學(xué)、醫(yī)學(xué)、材料學(xué)、環(huán)境科學(xué)等科學(xué)研究領(lǐng)域，還是在化工、醫(yī)藥、環(huán)境檢測(cè)、冶金等現(xiàn)代化生產(chǎn)與管理部門，紫外可見分光光度計(jì)都有面向廣的應(yīng)用。 </p> <p> 紫外可見分光光度計(jì)校正 </p> <p> 開機(jī)預(yù)熱10分鐘足矣； </p> <p> 放入黑塊和標(biāo)樣（沒有的自己配），關(guān)閉蓋子； </p> <p> 校0； </p> <p> 把燈光對(duì)著黑塊，把透光度調(diào)0； </p> <p> 把燈光對(duì)標(biāo)樣，將吸光度調(diào)到100%。 </p> <p> 紫外可見分光光度計(jì)使用注意事項(xiàng) </p> <p> 開機(jī)前應(yīng)先預(yù)熱15分鐘，然后開機(jī)自檢； </p> <p> 濕度要控制在75%左右，溫度在5～30度之間； </p> <p> 儀器要穩(wěn)壓電源，接地要好。并且避免陽光直接照射。分析檢測(cè)紫外可見分光光度計(jì)廠家供應(yīng)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="教學(xué)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/ydfx123/637396593771266494/7369055.png"></div><p style="text-indent:25px">紫外分光光度計(jì)檢測(cè)器是將光信號(hào)轉(zhuǎn)變?yōu)殡娦盘?hào)的裝置。測(cè)量吸光度時(shí)，并非直接測(cè)量透過吸收池的光強(qiáng)度，而是將光強(qiáng)度轉(zhuǎn)換成電流進(jìn)行測(cè)量，這種光電轉(zhuǎn)換器件稱為檢測(cè)器，又叫接受器。常用的檢測(cè)器有光電池、光電管、光電倍增管及光電二極管陣列檢測(cè)器等。光電池價(jià)格便宜，但長時(shí)間曝光，會(huì)使靈敏度降低。光電管的靈敏度比光電池高；光電倍增管不*靈敏度比普通光電管高，而且響應(yīng)速度快，目前中、高性能分光光度計(jì)中一般采用它作為檢測(cè)器。光電二極管陣列檢測(cè)器是紫外可見分光光度計(jì)檢測(cè)的一個(gè)重要進(jìn)展。</p><p> 光譜范圍紫外可見光譜區(qū)通常指190nm～780nm的波長范圍，但實(shí)際的分光光度計(jì)設(shè)計(jì)中，經(jīng)常將波長向長波方向拓展，進(jìn)入短波近紅外區(qū)。在120多種國外產(chǎn)品中，有52種波長≤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是其波長的上限。掃描光柵型使用分立光電器件，波長的擴(kuò)展更為靈活。 </p> <p> 波長的準(zhǔn)確性：*有16種偏差超過1nm，其余大多在01～1之間。其中突出的是Varian的Cary100/300，它們?cè)?561nm處的波長準(zhǔn)確性達(dá)到了002nm的水平。波長重復(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。紫外可見分光光度計(jì)在開機(jī)前將樣品室內(nèi)的干燥劑取出，儀器自檢過程中禁止打開樣品室蓋。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="教學(xué)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/ydfx123/637396593139440396/4585287.png"></div><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(cè)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(gè)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(cè)元素產(chǎn)生絡(luò)合反應(yīng)的分子），與我們的被測(cè)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。為了選擇合適的狹縫寬度，應(yīng)以減少狹縫寬度時(shí)紫外分光光度計(jì)試樣的吸光度不再增加為準(zhǔn)。建材紫外可見分光光度計(jì)單價(jià)</p><p style="text-indent:25px">紫外可見光分光光度計(jì)是使用紫外光譜特點(diǎn)而設(shè)計(jì)制造的光學(xué)儀器。教學(xué)紫外可見分光光度計(jì)排行</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。教學(xué)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。儀電分析致力于為客戶提供良好的分光光度計(jì)，氣相色譜，原子吸收，食品安全，一切以用戶需求為中心，深受廣大客戶的歡迎。公司秉持誠信為本的經(jīng)營理念，在儀器儀表深耕多年，以技術(shù)為先導(dǎo)，以自主產(chǎn)品為重點(diǎn)，發(fā)揮人才優(yōu)勢(shì)，打造儀器儀表良好品牌。儀電分析憑借創(chuàng)新的產(chǎn)品、專業(yè)的服務(wù)、眾多的成功案例積累起來的聲譽(yù)和口碑，讓企業(yè)發(fā)展再上新高。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1788829.html</p></div></div></div></div></div><div id="x2mt3aw" class="page-right twoColRt"><div 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