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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>?生產(chǎn)紫外可見分光光度計(jì)性價(jià)比真誠推薦上海儀電分析儀器供應(yīng)</p><div id="5egn7km" class="leftbox clearfix"><h1>生產(chǎn)紫外可見分光光度計(jì)性價(jià)比真誠推薦上海儀電分析儀器供應(yīng)</h1><div id="uoasmi7" class="proBig"><div id="regnugv" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="j7nk3f8" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="cqnk78x" 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>生產(chǎn)紫外可見分光光度計(jì)性價(jià)比,紫外可見分光光度計(jì)</p><p><span>***更新：</span>2020-11-01 07:21:21</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="xl2fjfc" 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="quokev7" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="3hyvceq" class="box"><p><p> 什么是紫外可見分光光度計(jì)？紫外可見分光光度計(jì)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(cè)、冶金等現(xiàn)代化生產(chǎn)與管理部門，生產(chǎn)紫外可見分光光度計(jì)性價(jià)比，紫外可見分光光度計(jì)都有重要的應(yīng)用。 </p> <p> 分光光度計(jì)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(jì)了第1臺(tái)比色計(jì)。到1918年，美國國家標(biāo)準(zhǔn)局制成了第1臺(tái)紫外可見分光光度計(jì)。此后，紫外可見分光光度計(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)控制等各種類型的儀器，使光度法的靈敏度和準(zhǔn)確度也不斷提高，其應(yīng)用范圍也不斷擴(kuò)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(jì)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(gè)部門和科學(xué)研究的各個(gè)領(lǐng)域所采用，成為人們從事生產(chǎn)和科研的有力測(cè)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(jì)和固定光柵式分光光度計(jì)，生產(chǎn)紫外可見分光光度計(jì)性價(jià)比。 </p> <p> <br /> 紫外可見光的范圍內(nèi)，生產(chǎn)紫外可見分光光度計(jì)性價(jià)比，對(duì)于一個(gè)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(jìn)行定性分析。生產(chǎn)紫外可見分光光度計(jì)性價(jià)比</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="生產(chǎn)紫外可見分光光度計(jì)性價(jià)比,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png"></div><p> 關(guān)于吸光度測(cè)定重復(fù)性的問題分光光度計(jì)在測(cè)定過程中，發(fā)現(xiàn)同一個(gè)溶液在不同時(shí)問里其測(cè)定結(jié)果不同，即重復(fù)性不好，其原因是什么?排除測(cè)定錯(cuò)誤因素外，可能原因有：(1)儀器預(yù)熱時(shí)間不夠或預(yù)熱方法不對(duì)所造成，應(yīng)延長預(yù)熱時(shí)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(shí)間使用其光電轉(zhuǎn)換效率發(fā)生了變化導(dǎo)致。這時(shí)標(biāo)準(zhǔn)溶液與待測(cè)溶液的吸光度都同樣變低，在相對(duì)定量時(shí)對(duì)結(jié)果影響很小。但是對(duì)這類儀器，一般建議連續(xù)使用時(shí)間不應(yīng)超過3h，若需長時(shí)間使用，間歇30min。材料紫外可見分光光度計(jì)差價(jià)實(shí)驗(yàn)室研究人員希望省錢購入專門儀器定量核酸、蛋白或者細(xì)菌的生長情況。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="生產(chǎn)紫外可見分光光度計(jì)性價(jià)比,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png"></div><p> 原子吸收分光光度計(jì)與紫外可見分光光度計(jì)的區(qū)別介紹 </p> <p> 原理： </p> <p> 原子吸收觀察的是構(gòu)成物質(zhì)的元素（原子）中的電子在原子軌道中的躍遷，屬于原子吸收. </p> <p> 紫外可見光吸收觀察的是構(gòu)成物質(zhì)的分子中的電子在分子軌道中的躍遷，屬于分子吸收. </p> <p> 能量: </p> <p> 兩者有所同，又有所不同。定量分析的原則同，而測(cè)量所需的光能量不同： </p> <p> 原子吸收為X射線，能量大，可激發(fā)電子從低的原子軌道向高的原子軌道躍遷. </p> <p> 紫外可見吸收為紫外光及可見光，能量小，只能激發(fā)電子從分子軌道向MAX低（或次低）的空的分子軌道躍遷。 </p> <p> 通俗的說，原子吸收分光光度計(jì)是用較高的溫度來燃燒分子，使之原子化（變?yōu)榛鶓B(tài)原子），再通過特征輻射，把基態(tài)原子激發(fā)，并吸收能量，通過這個(gè)能量差（透過率）來計(jì)算出濃度。而紫外—可見分光光度計(jì)是通過顯色劑（一種能和我們被測(cè)元素產(chǎn)生絡(luò)合反應(yīng)的分子），與我們的被測(cè)元素產(chǎn)生反應(yīng)，并且反應(yīng)物分子帶有特定的顏色，經(jīng)過分子吸收氘燈（紫外區(qū)）或鎢燈（可見區(qū)）的照射，吸收燈發(fā)射的能量，通過能量差（透過率）來計(jì)算出濃度。 </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，以很快的速度辨別是單胍還是雙胍，并進(jìn)行粗略定量。這是液相色譜無論如何也做不到的。 </p> <p> 測(cè)定透過率。透光率是一個(gè)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(duì)于某些原料檢測(cè)是非常實(shí)用的，可對(duì)此類原料品質(zhì)進(jìn)行總體把控。 </p> <p> 雜質(zhì)的檢測(cè)。通過前處理將雜質(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)。在水質(zhì)的常規(guī)監(jiān)測(cè)中，紫外可見分光光度法占有較大的比重，待測(cè)物的濃度和干擾物的濃度差別很大。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="生產(chǎn)紫外可見分光光度計(jì)性價(jià)比,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592155319523/9592810.png"></div>你的眼鏡真的防紫外嗎？紫外分光光度計(jì)告訴你 <p> 市場上的眼鏡多種多樣，有的近視沒辦法必須佩戴眼鏡，有的為了美觀，佩戴個(gè)眼鏡，還有些工作要求，需要佩戴眼鏡保護(hù)眼鏡。 </p> <p> 很多眼鏡都號(hào)稱是防紫外線的，這些眼鏡真的防紫外線嗎？ </p> <p> 早期的眼鏡是玻璃的，玻璃的很重，硬度高，現(xiàn)在幾乎被樹脂材料取代了。 </p> <p> 這些眼鏡是不是真的防紫外線呢？我們實(shí)驗(yàn)室的用數(shù)據(jù)來說話，很簡單的方法，只要我們有一臺(tái)紫外分光光度計(jì)就可以了。 </p> <p> 這里選擇了三款眼鏡，A款是公司要求佩戴的護(hù)目鏡，B款是可變色的近視眼鏡，C款為無框的近視眼鏡。 </p> <p> <br /> </p> <p> 在紫外分光光度計(jì)，選擇200-400nm波長掃描，間隔1nm就可以了，節(jié)約時(shí)間可以設(shè)置為間隔2nm。空氣做空白掃描后，將各眼鏡放置在比色皿的位置，目的是讓光能穿過眼鏡，再波長掃描。 </p> <p> <br /> 紫外可見分光光度計(jì)主要由光源系統(tǒng)、單色器系統(tǒng)、樣品室、檢測(cè)系統(tǒng)組成。材料紫外可見分光光度計(jì)差價(jià)</p><p style="text-indent:25px">紫外可見分光光度計(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光照射被分析的有機(jī)物質(zhì)。生產(chǎn)紫外可見分光光度計(jì)性價(jià)比</p><p> 眾所周知，紫外可見分光光度計(jì)的光源部需要經(jīng)常更換光源燈（鎢燈或氘燈），一般來說這種工作均由儀器廠家的工程師來進(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)自行嘗試過這種工作，但往往效果不太理想，究其原因則是沒有掌握要領(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事大吉；為此，我談?wù)勥@方面的調(diào)整要領(lǐng)。 </p> <p> 一般簡易型分光光度計(jì)的光源室**設(shè)計(jì)了一支鎢燈來涵蓋整個(gè)波長區(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，而在可見區(qū)使用鎢燈，兩只燈的選擇采用旋轉(zhuǎn)光源鏡來切換。生產(chǎn)紫外可見分光光度計(jì)性價(jià)比</p><p style="text-indent:25px">上海儀電分析儀器有限公司總部位于徐塘路88號(hào)7幢4層、9幢，是一家儀器儀表、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)部門批準(zhǔn)后方可開展經(jīng)營活動(dòng)】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)部門批準(zhǔn)后方可開展經(jīng)營活動(dòng)】的公司。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)部門批準(zhǔn)后方可開展經(jīng)營活動(dòng)】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)。【依法須經(jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營活動(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。儀電分析致力于把技術(shù)上的創(chuàng)新展現(xiàn)成對(duì)用戶產(chǎn)品上的貼心，為用戶帶來良好體驗(yàn)。儀電分析始終關(guān)注儀器儀表市場，以敏銳的市場洞察力，實(shí)現(xiàn)與客戶的成長共贏。</p></p><br 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