食品安全紫外可見(jiàn)分光光度計(jì)廠(chǎng)家供應(yīng) 真誠(chéng)推薦上海儀電分析儀器供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買(mǎi)產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="棱鏡單色器是利用不同波長(zhǎng)的光在棱鏡內(nèi)折射率不同將復(fù)合光色散為單色光，這種現(xiàn)象稱(chēng)為棱鏡的色散作用。常用的棱鏡由玻璃或石英制成?？梢?jiàn)光范圍常采用玻璃棱鏡，其色散力強(qiáng)，價(jià)格低廉，但是玻璃吸收紫外光，所以不宜用于紫外光區(qū)。紫外光范圍常用石英作為材料"><meta name="keywords" content="食品安全紫外可見(jiàn)分光光度計(jì)廠(chǎng)家供應(yīng),紫外可見(jiàn)分光光度計(jì)"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta 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class="home-main container clearfix"><div id="8rxvmdp" class="twoCol"><div id="rjabsyo" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁(yè)?<a 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_fenxiyiqi/">分析儀器</a>?<a href="http://www.cdcfah.com/cp/third-fenxiyiqi_zwfxy/">紫外分析儀</a>?食品安全紫外可見(jiàn)分光光度計(jì)廠(chǎng)家供應(yīng) 真誠(chéng)推薦上海儀電分析儀器供應(yīng)</p><div id="cezugwc" class="leftbox clearfix"><h1>食品安全紫外可見(jiàn)分光光度計(jì)廠(chǎng)家供應(yīng) 真誠(chéng)推薦上海儀電分析儀器供應(yīng)</h1><div id="y2ieqhn" class="proBig"><div id="e8wdpwd" 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="c7qrs83" 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="wzqm7hd" 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>食品安全紫外可見(jiàn)分光光度計(jì)廠(chǎng)家供應(yīng),紫外可見(jiàn)分光光度計(jì)</p><p><span>***更新：</span>2021-01-24 00:23:36</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="oh3i7sj" 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(xiàn)] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="rari2eq" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="dqbctms" class="box"><p><p> 棱鏡單色器是利用不同波長(zhǎng)的光在棱鏡內(nèi)折射率不同將復(fù)合光色散為單色光，這種現(xiàn)象稱(chēng)為棱鏡的色散作用。常用的棱鏡由玻璃或石英制成?？梢?jiàn)光范圍常采用玻璃棱鏡，其色散力強(qiáng)，價(jià)格低廉，但是玻璃吸收紫外光，所以不宜用于紫外光區(qū)。紫外光范圍常用石英作為材料，石英棱鏡的工作波長(zhǎng)范圍為185~4000nm，在紫外光區(qū)有較好的分辨力，而且也適用于可見(jiàn)光區(qū)和近紅外光區(qū)。棱鏡單色器的特點(diǎn)是波長(zhǎng)越短，食品安全紫外可見(jiàn)分光光度計(jì)廠(chǎng)家供應(yīng)，色散程度越好。越趨向長(zhǎng)波，色散程度越差，食品安全紫外可見(jiàn)分光光度計(jì)廠(chǎng)家供應(yīng)，所以，單色器用棱鏡的分光光度計(jì)，其波長(zhǎng)刻度在紫外光區(qū)可達(dá)到0.2nm，而在長(zhǎng)波段，只能達(dá)到5nm。紫外分光光度計(jì)的單色器是將光源發(fā)出的連續(xù)光譜分解成單色光，并能準(zhǔn)確方便地“取出”所需要的某一波長(zhǎng)的光的光學(xué)裝置，它是光度計(jì)的心臟。單色器主要由狹縫、色散元件和透鏡系統(tǒng)組成。其中色散元件是單色器的主要部件。常用的色散元件是棱鏡、光柵，食品安全紫外可見(jiàn)分光光度計(jì)廠(chǎng)家供應(yīng)，或者是兩者的組合。 </p> <p> <br /> 紫外可見(jiàn)分光光度計(jì)是由光源、單色器、吸收池、檢測(cè)器和信號(hào)處理器等部件組成。食品安全紫外可見(jiàn)分光光度計(jì)廠(chǎng)家供應(yīng)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="食品安全紫外可見(jiàn)分光光度計(jì)廠(chǎng)家供應(yīng),紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592155319523/9592810.png"></div><p> 雙光束型則是通過(guò)一個(gè)斬光輪（mirroredchopperwheel）將一束光分成兩束，分別測(cè)量對(duì)照樣品和實(shí)際樣品。可MIN光漂移（lampdrift）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(lái)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。光學(xué)構(gòu)造（OPTICALCONFIGURATION）一般來(lái)說(shuō)，紫外光分光光度計(jì)分為單光束和雙光束兩類(lèi)。顧名思義，單光束型主要是依賴(lài)單束光進(jìn)行測(cè)量。一束給定波長(zhǎng)的光通過(guò)對(duì)照物，然后再通過(guò)實(shí)際樣品溶液，就能得到吸光結(jié)果。專(zhuān)業(yè)紫外可見(jiàn)分光光度計(jì)差價(jià)使用紫外分光光度計(jì)應(yīng)具備四季恒濕的儀器室，配置恒溫設(shè)備，特別是地處南方地區(qū)的實(shí)驗(yàn)室。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="食品安全紫外可見(jiàn)分光光度計(jì)廠(chǎng)家供應(yīng),紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593893024301/8360761.png"></div><p> 波長(zhǎng)小于200nm的紫外光會(huì)被空氣吸收，只能在真空中傳播，因此稱(chēng)為真空紫外(VUV)。因此，普通的UV-Vis吸收光譜儀不能測(cè)量200nm以下的信號(hào)。 </p> <p> 如果要測(cè)量VUV波段光譜，需要保持光路真空，光譜儀結(jié)構(gòu)會(huì)更加復(fù)雜，也更加昂貴。 </p> <p> ①單光束UV：傳統(tǒng)的紫外，單光源發(fā)射單光束，全程密閉，通過(guò)光柵，照射樣品，由光電倍增管監(jiān)測(cè)器檢測(cè)。 </p> <p> 缺點(diǎn)：測(cè)完空白再測(cè)試樣品，全波段分析時(shí)間較長(zhǎng)（一般2min）。 </p> <p> ②比例雙光束UV：?jiǎn)喂庠磫喂馐堂荛]，通過(guò)光柵，加入棱鏡，把光分為兩束，分別照射樣品與空白，再合并光，進(jìn)入光電倍增管檢測(cè)器，通過(guò)差減法計(jì)算結(jié)果。 </p> <p> 好處：空白樣品同時(shí)檢測(cè)。 </p> <p> 缺點(diǎn)：靈敏度下降，全波段分析時(shí)間較長(zhǎng) </p><p> 紫外可見(jiàn)光分光光度計(jì)的體積大小以及外觀(guān)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(guān)，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> 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(xiàn)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> <br /> 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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="食品安全紫外可見(jiàn)分光光度計(jì)廠(chǎng)家供應(yīng),紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593139440396/4585287.png"></div><p> 吸收池是用于盛裝待測(cè)液并決定待測(cè)溶液透光液層厚度的器皿，又稱(chēng)比色皿。吸收池一般為長(zhǎng)方體，也有圓形或其它形狀的。其底及兩側(cè)為毛玻璃，另兩面為光學(xué)透光面。根據(jù)光學(xué)透光面的材質(zhì)，吸收池又可分為玻璃吸收池和石英吸收池兩種。玻璃吸收池用于可見(jiàn)光區(qū)測(cè)定，石英吸收池用于紫外光區(qū)的測(cè)定。吸收池的規(guī)格以光程為標(biāo)志。常用的吸收池規(guī)格有0.5cm、1.0cm、2.0cm、3.0cm、5.0cm等。光柵實(shí)現(xiàn)上就是一系列等寬、等距離的平行狹縫，它是利用光的衍射與干涉作用制成的。光柵作為色散元件具有不少獨(dú)特的優(yōu)點(diǎn)，光柵單色器的分辨率比棱鏡單色器的分辨率高，可精確到0.2nm，而且可用的波長(zhǎng)范圍也比棱鏡單色器的范圍寬。所以，目前生產(chǎn)的紫外可見(jiàn)分光光度計(jì)大多采用光柵作為色散元件。紫外可見(jiàn)分光光度計(jì)主要原因是未找到可產(chǎn)生銳線(xiàn)光譜的光源。高校紫外可見(jiàn)分光光度計(jì)</p><p style="text-indent:25px">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。食品安全紫外可見(jiàn)分光光度計(jì)廠(chǎng)家供應(yīng)</p><p> <br /> </p> <p> 1靈敏度高 </p> <p> 由于新的顯色劑的大量合成，并在應(yīng)用研究方面取得了可喜的進(jìn)展，使得對(duì)元素測(cè)定的靈敏度有所推進(jìn)，特別是有關(guān)多元絡(luò)合物和各種表面活性劑的應(yīng)用研究，使許多元素的摩爾吸光系數(shù)由原來(lái)的幾萬(wàn)提高到數(shù)十萬(wàn)。 </p> <p> 2選擇性好 </p> <p> 目前已有些元素只要利用控制適當(dāng)?shù)娘@色條件就可直接進(jìn)行光度法測(cè)定，如鈷、鈾、鎳、銅、銀、鐵等元素的測(cè)定，已有比較滿(mǎn)意的方法了。 </p> <p> 3準(zhǔn)確度高 </p> <p> 對(duì)于一般的分光光度法，其濃度測(cè)量的相對(duì)誤差在1～3%范圍內(nèi)，如采用示差分光光度法進(jìn)行測(cè)量，則誤差可減少到0.X%。 </p> <p> 4適用濃度范圍廣 </p> <p> 可從常量(1%～50%)(尤其使用示差法)到痕量(10-8～10-6%)(經(jīng)預(yù)富集后)。 </p> <p> 5分析成本低、操作簡(jiǎn)便、快速、應(yīng)用廣 </p> <p> 由于各種各樣的無(wú)機(jī)物和有機(jī)物在紫外可見(jiàn)區(qū)都有吸收，因此均可借此法加以測(cè)定。到目前為止，幾乎化學(xué)元素周期表上的所有元素(除少數(shù)放射性元素和惰性元素之外)均可采用此法。在國(guó)際上發(fā)表的有關(guān)分析的論文總數(shù)中，光度法約占28%，我國(guó)約占所發(fā)表論文總數(shù)的33%。紫外可見(jiàn)分光光度計(jì)的特點(diǎn)分光光度法對(duì)于分析人員來(lái)說(shuō)，可以說(shuō)是常用和有效的工具之一。幾乎每一個(gè)分析實(shí)驗(yàn)室都離不開(kāi)紫外可見(jiàn)分光光度計(jì)。分光光度法具有以下主要特點(diǎn)。食品安全紫外可見(jiàn)分光光度計(jì)廠(chǎng)家供應(yīng)</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2978376.html</p></div></div></div></div></div><div id="vfwitpv" class="page-right twoColRt"><div id="3z3txja" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="8camd3z" 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