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href="http://www.cdcfah.com/cp/third-gxyq_gpygdj/">光譜儀、光度計(jì)</a>?上海紫外可見(jiàn)分光光度計(jì)儀器歡迎咨詢(xún) 上海儀電分析儀器供應(yīng)</p><div id="7eumtv2" class="leftbox clearfix"><h1>上海紫外可見(jiàn)分光光度計(jì)儀器歡迎咨詢(xún) 上海儀電分析儀器供應(yīng)</h1><div id="nyprdfj" class="proBig"><div id="jsu7j74" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593893024301/8360761.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="swyahjg" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593893024301/8360761.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="on3ipr2" 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>上海紫外可見(jiàn)分光光度計(jì)儀器,紫外可見(jiàn)分光光度計(jì)</p><p><span>***更新：</span>2020-11-11 01:19:37</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="tsu7uy7" 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="kovxz3s" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="32aryv4" 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，上海紫外可見(jiàn)分光光度計(jì)儀器，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，上海紫外可見(jiàn)分光光度計(jì)儀器，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，上海紫外可見(jiàn)分光光度計(jì)儀器，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，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)。外可見(jiàn)分光光度計(jì)經(jīng)不斷改進(jìn)，又出現(xiàn)自動(dòng)記錄、自動(dòng)打印、數(shù)字顯示、微機(jī)控制等各種類(lèi)型的儀器。上海紫外可見(jiàn)分光光度計(jì)儀器</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海紫外可見(jiàn)分光光度計(jì)儀器,紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593893024301/8360761.png"></div><p> 進(jìn)行單波長(zhǎng)測(cè)量時(shí)，需要考慮朗伯比爾定律對(duì)入射光單色性的要求和測(cè)定靈敏度的要求。沒(méi)有干擾時(shí)，一般選擇在吸收峰的MAX吸收波長(zhǎng)位置處，如果有干擾，選擇在沒(méi)有干擾且吸光度變化較平緩的位置。進(jìn)行多波長(zhǎng)校正時(shí)，除盡量滿(mǎn)足單波長(zhǎng)測(cè)定的波長(zhǎng)要求外，還要求多個(gè)組分間的吸收光譜間線性無(wú)關(guān)。 </p> <p> 紫外分光光度計(jì)狹縫的大小會(huì)影響到儀器的信噪比和標(biāo)準(zhǔn)曲線的線性范圍。狹縫過(guò)大，通常會(huì)使線性范圍變小，特別是當(dāng)不在MAX吸收波長(zhǎng)位置測(cè)定時(shí)更是如此。狹縫過(guò)小，信噪比變差，基線平直度和測(cè)量數(shù)據(jù)的重復(fù)性會(huì)變差。此外，還需要考慮樣品吸收峰寬度的影響。通常單波長(zhǎng)測(cè)定時(shí)，一般選擇在MAX吸收波長(zhǎng)位置，線性范圍容易滿(mǎn)足，可選擇較寬的狹縫（1~2nm）多波長(zhǎng)測(cè)定時(shí)，很難同時(shí)在所有波長(zhǎng)都滿(mǎn)足線性范圍要求，應(yīng)選擇比較小的狹縫。上海紫外可見(jiàn)分光光度計(jì)儀器紫外光分光光度計(jì)分為單光束和雙光束兩類(lèi)。單光束型主要是依賴(lài)單束光進(jìn)行測(cè)量。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海紫外可見(jiàn)分光光度計(jì)儀器,紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594919157259/9098588.png"></div><p> 當(dāng)你什么都不了解的情況下，只選貴的，準(zhǔn)沒(méi)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(guò)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(jiàn)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(jiàn)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(wèn)題的同一把鑰匙。多問(wèn)自己幾個(gè)問(wèn)題：需要一臺(tái)什么樣的儀器，要用它來(lái)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(huà)出來(lái)了。 </p> <p> 紫外可見(jiàn)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(wú)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。 </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，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(lèi)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)。測(cè)量吸光度并不是測(cè)量透過(guò)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，稱(chēng)為紫外分光光度計(jì)的檢測(cè)器。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海紫外可見(jiàn)分光光度計(jì)儀器,紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592216930546/1658567.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。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。環(huán)境檢測(cè)紫外可見(jiàn)分光光度計(jì)生產(chǎn)廠家</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(lái)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。上海紫外可見(jiàn)分光光度計(jì)儀器</p><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(guò)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(chēng)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(zhǎng)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；光電倍增管不僅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(jiàn)分光光度計(jì)檢測(cè)的一個(gè)重要進(jìn)展。上海紫外可見(jiàn)分光光度計(jì)儀器</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(hù)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(hù)需求為中心，深受廣大客戶(hù)的歡迎。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/1935050.html</p></div></div></div></div></div><div id="ptq8rt9" class="page-right twoColRt"><div id="7d8szl9" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div 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