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class="leftbox clearfix"><h1>國(guó)產(chǎn)紫外可見(jiàn)分光光度計(jì)銷(xiāo)售廠家鑄造輝煌上海儀電分析儀器供應(yīng)</h1><div id="3bio2ax" class="proBig"><div id="cwoqipw" 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="ji2tfne" 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="rlyqifr" 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(jiàn)分光光度計(jì)銷(xiāo)售廠家,紫外可見(jiàn)分光光度計(jì)</p><p><span>***更新：</span>2020-11-11 07:23:25</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="z22xkh8" 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(huà): </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="w74byfz" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="vzrjq2w" class="box"><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(wú)論如何也做不到的。 </p> <p> 測(cè)定透過(guò)率。透光率是一個(gè)物理詞匯，是表示光線透過(guò)介質(zhì)的的能力，是透過(guò)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(guò)率的換算公式 </p> <p> 透過(guò)率對(duì)于某些原料檢測(cè)是非常實(shí)用的，可對(duì)此類(lèi)原料品質(zhì)進(jìn)行總體把控。 </p> <p> 雜質(zhì)的檢測(cè)。通過(guò)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(guò)程為例： </p> <p> 之后建立了4-氨基安替比林比色法，國(guó)產(chǎn)紫外可見(jiàn)分光光度計(jì)銷(xiāo)售廠家，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)，國(guó)產(chǎn)紫外可見(jiàn)分光光度計(jì)銷(xiāo)售廠家，國(guó)產(chǎn)紫外可見(jiàn)分光光度計(jì)銷(xiāo)售廠家，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)。紫外-可見(jiàn)分光光度法是利用某些物質(zhì)的分子吸收200--800nm光譜區(qū)的輻射來(lái)進(jìn)行分析測(cè)定的方法。國(guó)產(chǎn)紫外可見(jiàn)分光光度計(jì)銷(xiāo)售廠家</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(jiàn)分光光度計(jì)銷(xiāo)售廠家,紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592155319523/9592810.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。分析紫外可見(jiàn)分光光度計(jì)排行在操作紫外可見(jiàn)分光光度計(jì)時(shí)，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="國(guó)產(chǎn)紫外可見(jiàn)分光光度計(jì)銷(xiāo)售廠家,紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593808795839/2949755.png"></div><p> 雙光束UV：經(jīng)棱鏡分光后通過(guò)光柵，加強(qiáng)了靈敏度，同時(shí)測(cè)量空白樣品與目標(biāo)樣品的優(yōu)點(diǎn)，全波段分析時(shí)間長(zhǎng)。全波段UV：樣品與空白樣品可以暴露在空氣中，照射樣品后，進(jìn)入密閉箱，通過(guò)光柵，進(jìn)入DAD檢測(cè)器檢測(cè)。檢測(cè)樣品不需要密閉，外界光線對(duì)測(cè)試無(wú)影響，使用方便準(zhǔn)確且空白只需要檢測(cè)一次，全波段分析時(shí)間小于1s。 </p> <p> 紫外可見(jiàn)光分光光度計(jì)的體積大小以及外觀美學(xué)性。紫外可見(jiàn)分光光度計(jì)的儀器體積大小，會(huì)牽扯儀器所需要的擺放位置以及儀器使用的方便程度。 </p> <p> 儀器的外形美觀，給人以大氣、上檔次、舒適、新鮮的感覺(jué)。首先，會(huì)讓使用儀器者對(duì)儀器分外的愛(ài)護(hù)、維護(hù)和保養(yǎng)，有利于延長(zhǎng)儀器的使用壽命。同時(shí)，也會(huì)讓儀器使用者的工作環(huán)境更舒適、優(yōu)美，也有利于提高工作效率。 </p> <p> 紫外可見(jiàn)光分光光度計(jì)儀器使用范圍。紫外可見(jiàn)光分光光度的使用范圍是有儀器的性能指標(biāo)所決定。采購(gòu)紫外可見(jiàn)光分光光度計(jì)根據(jù)測(cè)試樣品的具體要求，參考儀器的使用范圍，滿(mǎn)足即可，不必苛求。當(dāng)然，土豪可以忽略。 </p>紫外可見(jiàn)分光光度計(jì)使用中常見(jiàn)問(wèn)題解析 <p> 在一般分光光度計(jì)的使用說(shuō)明書(shū)上，要求儀器預(yù)熱時(shí)間約20分鐘；若是帶微處理器的分光光度計(jì)，開(kāi)機(jī)后儀器自動(dòng)進(jìn)入自檢(初始化)狀態(tài)，約需1O分鐘左右。在分光光度計(jì)預(yù)熱這個(gè)環(huán)節(jié)上，很多使用者或多或少存在問(wèn)題，如開(kāi)機(jī)只預(yù)熱電路系統(tǒng)(不調(diào)節(jié)波長(zhǎng)、打開(kāi)吸收池暗箱蓋預(yù)熱等)或認(rèn)為初始化過(guò)程就是預(yù)熱等等。對(duì)帶微處理器有自檢功能的分光光度計(jì)，開(kāi)機(jī)后儀器自檢(初始化)結(jié)束后，在測(cè)定窗口上，設(shè)置所需波長(zhǎng)值，用一個(gè)吸收池裝上純凈水置于光路上，調(diào)“0000A”后，預(yù)熱儀器，當(dāng)儀器顯示讀數(shù)不再變化后即可進(jìn)行測(cè)定。 </p> <p> 對(duì)于紫外可見(jiàn)分光光度計(jì)，由于有雙光源(鎢燈與氘燈)，為了延長(zhǎng)燈的使用壽命，開(kāi)機(jī)自檢完成后可以關(guān)掉測(cè)定時(shí)不用的光源燈。大部分單機(jī)型的分光光度計(jì)包含了驅(qū)動(dòng)儀器運(yùn)行和管理數(shù)據(jù)的軟件。與PC機(jī)一起聯(lián)用，需要從制造商購(gòu)買(mǎi)軟件。</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(jiàn)分光光度計(jì)銷(xiāo)售廠家,紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png"></div><p style="text-indent:25px"><p>紫外可見(jiàn)分光光度計(jì)定量、定性分析需注意的問(wèn)題<p>重復(fù)測(cè)定次數(shù)和波長(zhǎng)掃描速度：對(duì)吸光度不是很大的樣品，或者狹縫不是很小，這是檢測(cè)器檢測(cè)的光信號(hào)的強(qiáng)度是比較大的，重復(fù)性較好，可選擇較少的重復(fù)次數(shù)。相反，如果樣品吸光度很大，狹縫很小，選擇較大的重復(fù)次數(shù)可獲得更好的結(jié)果。5測(cè)定波長(zhǎng)間隔：在掃描光譜時(shí)需要選擇，可根據(jù)樣品吸收峰的寬度進(jìn)行選擇，峰寬較大時(shí)，可選擇較大的波長(zhǎng)間隔。反之亦反。通常每個(gè)正常的吸收峰應(yīng)該用不少于30個(gè)數(shù)據(jù)點(diǎn)表示出來(lái)。為了測(cè)量吸光值，分光光度計(jì)制造商通常使用光電倍增管（photo-multiplier tubes，PMTs）和光敏二極管。飼料紫外可見(jiàn)分光光度計(jì)代理</p><p style="text-indent:25px">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。國(guó)產(chǎn)紫外可見(jiàn)分光光度計(jì)銷(xiāo)售廠家</p><p> 紫外可見(jiàn)分光光度計(jì)是一類(lèi)很重要的實(shí)驗(yàn)室分析儀器，無(wú)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(mén)，紫外可見(jiàn)分光光度計(jì)都有面向廣的應(yīng)用。 </p> <p> 紫外可見(jiàn)分光光度計(jì)校正 </p> <p> 開(kāi)機(jī)預(yù)熱10分鐘足矣； </p> <p> 放入黑塊和標(biāo)樣（沒(méi)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(jiàn)分光光度計(jì)使用注意事項(xiàng) </p> <p> 開(kāi)機(jī)前應(yīng)先預(yù)熱15分鐘，然后開(kāi)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(yáng)光直接照射。國(guó)產(chǎn)紫外可見(jiàn)分光光度計(jì)銷(xiāo)售廠家</p><p style="text-indent:25px">上海儀電分析儀器有限公司位于徐塘路88號(hào)7幢4層、9幢。公司業(yè)務(wù)分為分光光度計(jì)，氣相色譜，原子吸收，食品安全等，目前不斷進(jìn)行創(chuàng)新和服務(wù)改進(jìn)，為客戶(hù)提供良好的產(chǎn)品和服務(wù)。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。儀電分析憑借創(chuàng)新的產(chǎn)品、專(zhuān)業(yè)的服務(wù)、眾多的成功案例積累起來(lái)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(lái)源地址: http://www.cdcfah.com/cp/1943527.html</p></div></div></div></div></div><div id="u39kh3z" class="page-right twoColRt"><div id="gqxury8" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="w8yfcz9" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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