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class="current"> 當前位置:<a href="http://www.cdcfah.com/">首頁?<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</a>?暗箱紫外可見分光光度計誠信互利上海儀電分析儀器供應(yīng)</p><div id="mxme0z8" class="leftbox clearfix"><h1>暗箱紫外可見分光光度計誠信互利上海儀電分析儀器供應(yīng)</h1><div id="bqdd3ib" class="proBig"><div id="a5apvrk" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592124342670/5540999.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="oynvt5w" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592124342670/5540999.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="mp0ur18" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</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>暗箱紫外可見分光光度計,紫外可見分光光度計</p><p><span>***更新：</span>2020-11-12 01:18:37</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="bpjrh3f" 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: </span>021-34530361</p><p><span>地址: </span>徐塘路88號7幢4層、9幢</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="gzjhjeu" class="page-proshow02"><p class="title">詳細說明</p><div id="irkoeuz" class="box"><p><p> 定性定量。利用特定的吸收峰，快速對待測樣品進行定性和定量分析。如聚六亞甲基雙胍鹽酸鹽的檢測。利用雙波長，以很快的速度辨別是單胍還是雙胍，并進行粗略定量。這是液相色譜無論如何也做不到的。 </p> <p> 測定透過率。透光率是一個物理詞匯，是表示光線透過介質(zhì)的的能力，是透過透明或半透明物體的光通量與其入射光通量的百分率。吸光度與透過率的換算公式 </p> <p> 透過率對于某些原料檢測是非常實用的，可對此類原料品質(zhì)進行總體把控。 </p> <p> 雜質(zhì)的檢測。通過前處理將雜質(zhì)與主成分分離后，進行紫外分光光度測定，可很快得到該雜質(zhì)的含量。以桑普實驗室這十幾年對苯氧乙醇中雜質(zhì)苯酚的測定方法改進過程為例： </p> <p> 之后建立了4-氨基安替比林比色法，可實現(xiàn)對苯氧乙醇含量20、40，暗箱紫外可見分光光度計、60、80，暗箱紫外可見分光光度計、100ppm的區(qū)分；紫外分光光度法 </p> <p> 期間同時采用EP中紫外分光光度法，并將其進行適當改進，作為修訂后的企標。該方法便利快速，可實現(xiàn)50ppm以上的定量檢測。HPLC-DAD </p> <p> 近兩年，桑普對產(chǎn)品品質(zhì)把控更嚴格，希望能實現(xiàn)幾個ppm的定量檢測。所以采用了HPLC-DAD作為企標對其檢測。在水質(zhì)的常規(guī)監(jiān)測中，暗箱紫外可見分光光度計，紫外可見分光光度法占有較大的比重，待測物的濃度和干擾物的濃度差別很大。暗箱紫外可見分光光度計</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="暗箱紫外可見分光光度計,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592124342670/5540999.png"></div><p> 什么是紫外可見分光光度計？紫外可見分光光度計是一類很重要的分析儀器，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、冶金等現(xiàn)代化生產(chǎn)與管理部門，紫外可見分光光度計都有重要的應(yīng)用。 </p> <p> 分光光度計是杜包斯克(Duboscq)和奈斯勒(Nessler)等人在1854年將朗伯-比爾(Lambert-Beer)定律應(yīng)用于定量分析化學(xué)領(lǐng)域，并且設(shè)計了第1臺比色計。到1918年，美國國家標準局制成了第1臺紫外可見分光光度計。此后，紫外可見分光光度計經(jīng)不斷改進，又出現(xiàn)自動記錄、自動打印、數(shù)字顯示、微機控制等各種類型的儀器，使光度法的靈敏度和準確度也不斷提高，其應(yīng)用范圍也不斷擴大。紫外可見分光光度法從問世以來，在應(yīng)用方面有了很大的發(fā)展，尤其是在相關(guān)學(xué)科發(fā)展的基礎(chǔ)上，促使分光光度計儀器的不斷創(chuàng)新，功能更加齊全，使得光度法的應(yīng)用更拓寬了范圍。目前，分光光度法已為工農(nóng)業(yè)各個部門和科學(xué)研究的各個領(lǐng)域所采用，成為人們從事生產(chǎn)和科研的有力測試手段。目前市場上有兩類主流產(chǎn)品:掃描光柵式分光光度計和固定光柵式分光光度計。 </p> <p> <br /> 常用紫外可見分光光度計紫外可見光的范圍內(nèi)，對于一個特定的波長，吸收的程度正比于試樣中該成分的濃度，可以進行定性分析。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="暗箱紫外可見分光光度計,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594919157259/9098588.png"></div>紫外可見分光光度計使用中常見問題解析 <p> 在一般分光光度計的使用說明書上，要求儀器預(yù)熱時間約20分鐘；若是帶微處理器的分光光度計，開機后儀器自動進入自檢(初始化)狀態(tài)，約需1O分鐘左右。在分光光度計預(yù)熱這個環(huán)節(jié)上，很多使用者或多或少存在問題，如開機只預(yù)熱電路系統(tǒng)(不調(diào)節(jié)波長、打開吸收池暗箱蓋預(yù)熱等)或認為初始化過程就是預(yù)熱等等。對帶微處理器有自檢功能的分光光度計，開機后儀器自檢(初始化)結(jié)束后，在測定窗口上，設(shè)置所需波長值，用一個吸收池裝上純凈水置于光路上，調(diào)“0000A”后，預(yù)熱儀器，當儀器顯示讀數(shù)不再變化后即可進行測定。 </p> <p> 對于紫外可見分光光度計，由于有雙光源(鎢燈與氘燈)，為了延長燈的使用壽命，開機自檢完成后可以關(guān)掉測定時不用的光源燈。 </p><p> 當你什么都不了解的情況下，只選貴的，準沒錯。在某種程度上，這句話具有一定的適用性。但是，新型儀器一般價格較貴，如果過度放寬儀器預(yù)算，而追加經(jīng)費采購不需要的配件也是一種浪費。如何快速簡單的掌握紫外可見分光光度計的特性，從而進行合適的采購定位，小編將所需要的知識點總結(jié)如下。 </p> <p> 認識紫外可見光分光光度計使用范圍。任何一臺儀器都不是解決所有問題的同一把鑰匙。多問自己幾個問題：需要一臺什么樣的儀器，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作為一種常規(guī)的實驗室分析儀器，可以常用于無機物、有機物的定性定量分析，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。傳統(tǒng)單光束UV紫外測試，測試過程全程封閉，單光束光源只通過光柵直接照射樣品，再經(jīng)光電倍增管檢測器檢測。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="暗箱紫外可見分光光度計,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png"></div><p> 常見的可見分光光度計和紫外可見分光光度計的型號有哪些? </p> <p> 可見分光光度計常見的有721系列，722系列和723系列。721系列可見分光光度計有721/721-100型，測定波長為360-800nm，分為分指針和數(shù)顯式兩種方式的顯示器。其中721-100型相對于721是型將測試樣品室加寬，可用10cm的比色皿，為糖廠**檢測儀器。722系列可見分光光度計有722/722S/722N型，測定波長為330-1000nm/325-1000nm。722型波長是330-1000nm，722S與722N的波長范圍325-1000nm，其中722N是自動調(diào)節(jié)波長。723系列可見分光光度計有723/723N/723PC/723PCS型四種，測定波長為320-1000nm，其中723是手動調(diào)整波長，723N是自動調(diào)波長，723PC配有掃描軟件，723PCS帶有掃描軟件和打印機。紫外可見分光光度計常見的是UV752/UV752N，波長范圍是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微的差別。紫外光分光光度計分為單光束和雙光束兩類。單光束型主要是依賴單束光進行測量。國產(chǎn)紫外可見分光光度計儀器</p><p style="text-indent:25px">為了測量吸光值，分光光度計制造商通常使用光電倍增管（photo-multiplier tubes，PMTs）和光敏二極管。暗箱紫外可見分光光度計</p><p> 關(guān)于吸光度測定重復(fù)性的問題分光光度計在測定過程中，發(fā)現(xiàn)同一個溶液在不同時問里其測定結(jié)果不同，即重復(fù)性不好，其原因是什么?排除測定錯誤因素外，可能原因有：(1)儀器預(yù)熱時間不夠或預(yù)熱方法不對所造成，應(yīng)延長預(yù)熱時間或采用正確的預(yù)熱方法。 </p> <p> (2)光電轉(zhuǎn)換器(如光電管)因長時間使用其光電轉(zhuǎn)換效率發(fā)生了變化導(dǎo)致。這時標準溶液與待測溶液的吸光度都同樣變低，在相對定量時對結(jié)果影響很小。但是對這類儀器，一般建議連續(xù)使用時間不應(yīng)超過3h，若需長時間使用，間歇30min。暗箱紫外可見分光光度計</p><p style="text-indent:25px">上海儀電分析儀器有限公司辦公設(shè)施齊全，辦公環(huán)境優(yōu)越，為員工打造良好的辦公環(huán)境。在儀電分析近多年發(fā)展歷史，公司旗下現(xiàn)有品牌儀電分析,上分等。公司不**提供專業(yè)的儀器儀表、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，計算機軟件開發(fā)及銷售，從事貨物進出口及技術(shù)進出口業(yè)務(wù)。【依法須經(jīng)批準的項目，經(jīng)相關(guān)部門批準后方可開展經(jīng)營活動】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，計算機軟件開發(fā)及銷售，從事貨物進出口及技術(shù)進出口業(yè)務(wù)。【依法須經(jīng)批準的項目，經(jīng)相關(guān)部門批準后方可開展經(jīng)營活動】，同時還建立了完善的售后服務(wù)體系，為客戶提供良好的產(chǎn)品和服務(wù)。自公司成立以來，一直秉承“以質(zhì)量求生存，以信譽求發(fā)展”的經(jīng)營理念，始終堅持以客戶的需求和滿意為重點，為客戶提供良好的分光光度計，氣相色譜，原子吸收，食品安全，從而使公司不斷發(fā)展壯大。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1949350.html</p></div></div></div></div></div><div id="aymr3pt" class="page-right twoColRt"><div id="ocr8gz8" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="v0fnl18" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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