民用紫外可見(jiàn)分光光度計(jì)排名服務(wù)為先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="當(dāng)以空白試劑為參比調(diào)節(jié)儀器零點(diǎn)時(shí)，比色皿窗材料的吸收、內(nèi)外窗面的散射以及溶劑的吸收等都被抵消，所得吸光度值完全由顯色溶液中待測(cè)離了濃度所決定。此時(shí)吸光度值與試液濃度一般呈線性關(guān)系。吸光度值與測(cè)定濃度不成直線關(guān)系，發(fā)生向下彎曲(負(fù)偏離)或向上"><meta name="keywords" content="民用紫外可見(jiàn)分光光度計(jì)排名,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 name="baidu-site-verification" 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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_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>?民用紫外可見(jiàn)分光光度計(jì)排名服務(wù)為先上海儀電分析儀器供應(yīng)</p><div id="l3frf7j" class="leftbox clearfix"><h1>民用紫外可見(jiàn)分光光度計(jì)排名服務(wù)為先上海儀電分析儀器供應(yīng)</h1><div id="pdb7xrl" class="proBig"><div id="5t5vpbd" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="jx5hznz" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="3dbfzlh" 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>民用紫外可見(jiàn)分光光度計(jì)排名,紫外可見(jiàn)分光光度計(jì)</p><p><span>***更新：</span>2020-11-06 04:19:26</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="rplrx3v" 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="zd3zp3j" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="lzv33fn" class="box"><p><p> 當(dāng)以空白試劑為參比調(diào)節(jié)儀器零點(diǎn)時(shí)，比色皿窗材料的吸收、內(nèi)外窗面的散射以及溶劑的吸收等都被抵消，所得吸光度值完全由顯色溶液中待測(cè)離了濃度所決定。此時(shí)吸光度值與試液濃度一般呈線性關(guān)系。吸光度值與測(cè)定濃度不成直線關(guān)系，發(fā)生向下彎曲(負(fù)偏離)或向上彎曲(正偏離)的現(xiàn)象而偏離朗伯一比爾定律的主要原因如下。 </p> <p> <br /> </p> <p> (1)非單色光的影響：紫外一可見(jiàn)分光光度訃使用連續(xù)光源和分光器分光，不可能得到真正理想的單色光；為保證在測(cè)量中能得到充分的光強(qiáng)，儀器必須保持一定的狹縫寬度。由狹縫射出后投射到被測(cè)物質(zhì)上的光，是一個(gè)有限寬度的譜帶——光譜通帶。隨光譜通帶寬度的增大，吸收光譜的分辨率降低，并偏離朗伯一比爾定律。 </p> <p> (2)非吸收光的影響：當(dāng)來(lái)自出射狹縫的光的光譜通帶寬度大于吸收光譜譜帶時(shí)，投射在被測(cè)物質(zhì)上的光就含有非吸收光，民用紫外可見(jiàn)分光光度計(jì)排名，民用紫外可見(jiàn)分光光度計(jì)排名。這不*能使靈敏度降低，民用紫外可見(jiàn)分光光度計(jì)排名，且能使校準(zhǔn)曲線向橫坐標(biāo)軸彎曲而偏離朗伯一比爾定律。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。民用紫外可見(jiàn)分光光度計(jì)排名</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="民用紫外可見(jiàn)分光光度計(jì)排名,紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png"></div><p> 紫外可見(jiàn)分光光度計(jì)是一類很重要的實(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。紫外可見(jiàn)分光光度計(jì)賣價(jià)紫外可見(jiàn)分光光度計(jì)在開(kāi)機(jī)前將樣品室內(nèi)的干燥劑取出，儀器自檢過(guò)程中禁止打開(kāi)樣品室蓋。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="民用紫外可見(jiàn)分光光度計(jì)排名,紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593980700101/5381945.png"></div><p> 眾所周知，紫外可見(jiàn)分光光度計(jì)的光源部需要經(jīng)常更換光源燈（鎢燈或氘燈），一般來(lái)說(shuō)這種工作均由儀器廠家的工程師來(lái)進(jìn)行；如果儀器用戶自己可以掌握這種更換和調(diào)整技術(shù)，既能節(jié)約等待時(shí)間又能節(jié)省維修費(fèi)用，可謂一舉兩得。 </p> <p> 雖然有些用戶也曾經(jīng)自行嘗試過(guò)這種工作，但往往效果不太理想，究其原因則是沒(méi)有掌握要領(lǐng)，他們將這種更換光源燈的工作看做與更換室內(nèi)照明燈泡的性質(zhì)一樣，認(rèn)為只要換上的光源燈被亮即萬(wàn)事大吉；為此，我談?wù)勥@方面的調(diào)整要領(lǐng)。 </p> <p> 一般簡(jiǎn)易型分光光度計(jì)的光源室**設(shè)計(jì)了一支鎢燈來(lái)涵蓋整個(gè)波長(zhǎng)區(qū)域的使用，由于鎢燈的能量在紫外區(qū)很弱，因此、此類儀器在紫外區(qū)的測(cè)量信號(hào)的噪聲較大。 </p> <p> 當(dāng)然、也有**的紫外分光光度計(jì)，同理、光源燈就改用一支氘燈了。 </p> <p> <br /> </p> <p> 為了保障在190～1100nm區(qū)域內(nèi)的高信噪比，目前的儀器均采用兩只光源燈互補(bǔ)使用，即在紫外區(qū)采用氘燈，而在可見(jiàn)區(qū)使用鎢燈，兩只燈的選擇采用旋轉(zhuǎn)光源鏡來(lái)切換。 </p><p> 常見(jiàn)的可見(jiàn)分光光度計(jì)和紫外可見(jiàn)分光光度計(jì)的型號(hào)有哪些? </p> <p> 可見(jiàn)分光光度計(jì)常見(jiàn)的有721系列，722系列和723系列。721系列可見(jiàn)分光光度計(jì)有721/721-100型，測(cè)定波長(zhǎng)為360-800nm，分為分指針和數(shù)顯式兩種方式的顯示器。其中721-100型相對(duì)于721是型將測(cè)試樣品室加寬，可用10cm的比色皿，為糖廠**檢測(cè)儀器。722系列可見(jiàn)分光光度計(jì)有722/722S/722N型，測(cè)定波長(zhǎng)為330-1000nm/325-1000nm。722型波長(zhǎng)是330-1000nm，722S與722N的波長(zhǎng)范圍325-1000nm，其中722N是自動(dòng)調(diào)節(jié)波長(zhǎng)。723系列可見(jiàn)分光光度計(jì)有723/723N/723PC/723PCS型四種，測(cè)定波長(zhǎng)為320-1000nm，其中723是手動(dòng)調(diào)整波長(zhǎng)，723N是自動(dòng)調(diào)波長(zhǎng)，723PC配有掃描軟件，723PCS帶有掃描軟件和打印機(jī)。紫外可見(jiàn)分光光度計(jì)常見(jiàn)的是UV752/UV752N，波長(zhǎng)范圍是195nm-1020nm。二者<span style="display:none;"></span>主要區(qū)別是UV752N可以選配打印機(jī)將數(shù)據(jù)輸出，其中在雜散光參數(shù)，光譜帶寬等方面還有細(xì)微的差別。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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="民用紫外可見(jiàn)分光光度計(jì)排名,紫外可見(jiàn)分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593139440396/4585287.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(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*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。紫外可見(jiàn)分光光度計(jì)基本工作原理和紅外光譜儀相似，利用一定頻率的紫外可見(jiàn)光照射被分析的有機(jī)物質(zhì)。民用紫外可見(jiàn)分光光度計(jì)排名</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(cè)定，既可以定性分析，又可以定量分析。民用紫外可見(jiàn)分光光度計(jì)排名</p><p>光源和檢測(cè)方法（LIGHTSOURCESANDDETECTION）分光光度計(jì)的光譜也是需要考慮的一個(gè)重要因素。實(shí)驗(yàn)室研究人員希望省錢(qián)購(gòu)入專門(mén)儀器定量核酸、蛋白或者細(xì)菌的生長(zhǎng)情況。例如AmershamBiosciencesofPiscataway公司的GeneQuantII能在230、260、280、320、595和600nm的波長(zhǎng)下測(cè)量樣品。果果需要更大的靈活性，研究者可以考慮一種更高性能的寬光譜儀器，可以程序性地進(jìn)行ELISAs分析和比色分析。</p><p>紫外分光光度計(jì)一般覆蓋190nm和380nm波長(zhǎng)，通常利用氘燈照明。一些特殊的儀器可以提供滿足光子學(xué)和半導(dǎo)體研究需要的光譜范圍。VarianofPaloAlto公司的CaryDeepUV和HitachiHighTechnologiesofTokyo的U-7000AutomatedVacuumUVSystem就是這樣的儀器。</p><p>一些儀器具有多種光源供選擇：紫外光、可見(jiàn)光和甚至紅外光（780nm至3,000nm）。鎢燈和鹵素?zé)粢话阒桓采w可見(jiàn)光部分（大約380nm到800nm）。而氙燈則可以覆蓋紫外光和可見(jiàn)光區(qū)域。民用紫外可見(jiàn)分光光度計(jì)排名</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，以科技創(chuàng)新實(shí)現(xiàn)***管理的追求。儀電分析作為儀器儀表、電子元器件及相關(guān)的系統(tǒng)集成的生產(chǎn)、服務(wù)及銷售，計(jì)算機(jī)軟件開(kāi)發(fā)及銷售，從事貨物進(jìn)出口及技術(shù)進(jìn)出口業(yè)務(wù)?！疽婪毥?jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門(mén)批準(zhǔn)后方可開(kāi)展經(jīng)營(yíng)活動(dòng)】?jī)x器儀表、電子元器件及相關(guān)的系統(tǒng)集成的生產(chǎn)、服務(wù)及銷售，計(jì)算機(jī)軟件開(kāi)發(fā)及銷售，從事貨物進(jìn)出口及技術(shù)進(jìn)出口業(yè)務(wù)?！疽婪毥?jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門(mén)批準(zhǔn)后方可開(kāi)展經(jīng)營(yíng)活動(dòng)】的企業(yè)之一，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。儀電分析始終以本分踏實(shí)的精神和必勝的信念，影響并帶動(dòng)團(tuán)隊(duì)取得成功。儀電分析創(chuàng)始人湯志東，始終關(guān)注客戶，創(chuàng)新科技，竭誠(chéng)為客戶提供良好的服務(wù)。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/1868446.html</p></div></div></div></div></div><div id="3rp5dn3" class="page-right twoColRt"><div id="rtrfdjz" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="n5j5hf5" class="recomPic likePro"><a 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