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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>?低端紫外可見分光光度計(jì)賣價(jià) 歡迎來電上海儀電分析儀器供應(yīng)</p><div id="oxuby3e" class="leftbox clearfix"><h1>低端紫外可見分光光度計(jì)賣價(jià) 歡迎來電上海儀電分析儀器供應(yīng)</h1><div id="imtvczt" class="proBig"><div id="imeg7pp" 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="fjqiuml" 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="8k2d2fr" 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>低端紫外可見分光光度計(jì)賣價(jià),紫外可見分光光度計(jì)</p><p><span>***更新：</span>2020-11-19 04:16:14</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="vognkwd" 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="8oyfwt8" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="qol8qhj" class="box"><p><p> 可見分光光度計(jì)是一種常規(guī)的實(shí)驗(yàn)室分析儀器?？沙Ｓ糜跓o機(jī)物、有機(jī)物的定性、定量分析中，在科研、制藥、化工、環(huán)保、衛(wèi)生，低端紫外可見分光光度計(jì)賣價(jià)、防疫等領(lǐng)域中發(fā)揮重要的作用。有人說，紫外、可見分光光度計(jì)就是一把尺子一個(gè)天平，凡是有化驗(yàn)、分析的地方都能用到它。那么，如何評價(jià)一臺(tái)紫外、可見分光光度計(jì)的優(yōu)劣呢? </p> <p> 要考察它的外觀，低端紫外可見分光光度計(jì)賣價(jià)。試想，一臺(tái)外型呆板、做工粗糙的儀器，低端紫外可見分光光度計(jì)賣價(jià)，怎么可能是一臺(tái)先進(jìn)的儀器呢? </p> <p> 我們探討一下會(huì)對儀器的使用有很大影響的幾個(gè)重要指標(biāo) </p> <p> <p> 1、光度準(zhǔn)確度 </p> <p> 2、雜散光 </p> <p> 3、光譜帶寬 </p> <p> 4、穩(wěn)定性 </p> <p> 5、噪聲 </p> <p> 6、波長的準(zhǔn)確度和重復(fù)性 </p> <p> <br /> </p> 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。低端紫外可見分光光度計(jì)賣價(jià)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="低端紫外可見分光光度計(jì)賣價(jià),紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592124342670/5540999.png"></div><p> 常見的可見分光光度計(jì)和紫外可見分光光度計(jì)的型號有哪些? </p> <p> 可見分光光度計(jì)常見的有721系列，722系列和723系列。721系列可見分光光度計(jì)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(jì)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(dòng)調(diào)節(jié)波長。723系列可見分光光度計(jì)有723/723N/723PC/723PCS型四種，測定波長為320-1000nm，其中723是手動(dòng)調(diào)整波長，723N是自動(dòng)調(diào)波長，723PC配有掃描軟件，723PCS帶有掃描軟件和打印機(jī)。紫外可見分光光度計(jì)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(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。分析檢測紫外可見分光光度計(jì)賣價(jià)紫外可見分光光度計(jì)應(yīng)安裝在太陽不能直接曬到的地方，以免“室光” 太強(qiáng)，影響儀器的使用壽命。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="低端紫外可見分光光度計(jì)賣價(jià),紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593139440396/4585287.png"></div><p> 使用紫外分光光度計(jì)的過程中，經(jīng)常會(huì)遇到儀器因光源達(dá)不到要求，需要進(jìn)行調(diào)修。要求光源燈處不能有空氣流動(dòng)，因?yàn)閱喂馐鴥x器很忌諱空氣快速流動(dòng)而使光源燈的色溫發(fā)生變化。如遇電壓正常而鎢燈不亮?xí)r，就需要更換鎢燈。更換時(shí)，不要用手直接接觸燈泡表面，如果手指摸過，應(yīng)用無水乙醇和C4H10O混合液擦拭干凈，否則通電后指印遇熱不能去除。安裝光源燈后要注意調(diào)整光路。光源燈有兩個(gè)引線頭，安裝時(shí)用導(dǎo)線焊接，主要是防止接觸不良而造成的光源發(fā)光不穩(wěn)現(xiàn)象。在焊接時(shí)防止焊點(diǎn)與燈頭銅皮碰上，裝上燈座使電源短路。燈絲要求平直，如果燈絲彎曲，會(huì)影響光能量。燈絲的位置要與入射狹縫平行并對準(zhǔn)，上、下、左、右調(diào)節(jié)后緊固螺釘。擰緊燈座的螺紋套，可用鉗子擰緊，一般燈頭盡量往燈座里塞，因?yàn)槎鄶?shù)燈絲離燈頭偏高。調(diào)整燈位置的前后可移動(dòng)整個(gè)燈座架，它下面有三個(gè)固定螺釘，先稍松后，移動(dòng)前后位置再固定。一般調(diào)節(jié)鎢燈的位置時(shí)，將波長調(diào)到580nm處，狹縫調(diào)到MAX，把一張白紙置于比色皿盒邊出口處，觀察白紙上的光斑。若光斑上方左右角均不完整成半圓弧，可能是光源燈高度不對；光斑左邊或右邊不完整，可調(diào)光源燈底座位置。調(diào)整至白紙上可見明亮、均勻的長方形黃橙色光斑。 </p><p> 紫外分光光度計(jì)--注意事項(xiàng) </p> <p> 1．該儀器應(yīng)放在干燥的房間內(nèi)，使用時(shí)放置在堅(jiān)固平穩(wěn)的工作臺(tái)上，室內(nèi)照明不宜太強(qiáng)。熱天時(shí)不能用電扇直接向儀器吹風(fēng)，防止燈泡燈絲發(fā)亮不穩(wěn)定。 </p> <p> 2．使用本儀器前，使用者應(yīng)該首先了解本儀器的結(jié)構(gòu)和工作原理，以及各個(gè)操縱旋鈕之功能。在未按通電源之前，應(yīng)該對儀器的安全性能進(jìn)行檢查，電源接線應(yīng)牢固，通電也要良好，各個(gè)調(diào)節(jié)旋鈕的起始位置應(yīng)該正確，然后再按通電源開關(guān)。 </p> <p> 3．在儀器尚未接通電源時(shí)，電表指針必須于“0”刻線上，若不是這種情況，則可以用電表上的校正螺絲進(jìn)行調(diào)節(jié)。分光光度計(jì)的氘燈和汞燈是在不同波長的時(shí)候有程序控制自動(dòng)變換的，一般是在360nm處變換。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="低端紫外可見分光光度計(jì)賣價(jià),紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594849245086/5585171.png"></div><p> 紫外可見分光光度計(jì)種類及優(yōu)缺點(diǎn)對比 </p> <p> <br /> </p> <p> 單光束UV：傳統(tǒng)的紫外，單光源發(fā)射單光束，全程密閉，通過光柵，照射樣品，由光電倍增管監(jiān)測器檢測。 </p> <p> 缺點(diǎn)：測完空白再測試樣品，全波段分析時(shí)間較長（一般2min）。2比例雙光束UV：單光源單光束，全程密閉，通過光柵，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)入光電倍增管檢測器，通過差減法計(jì)算結(jié)果。 </p> <p> 好處：空白樣品同時(shí)檢測。 </p> <p> 缺點(diǎn)：靈敏度下降，全波段分析時(shí)間較長。3雙光束UV：單光源單光束，全程密閉，通過棱鏡分出兩道光，分別通過一光柵，分別進(jìn)入各自的光點(diǎn)倍增管檢測器。 </p> <p> 好處：加強(qiáng)靈敏度，同時(shí)測量空白與樣品。 </p> <p> 缺點(diǎn)：全波段分析時(shí)間較長。4全波段UV：單光源單光束，樣品與空白暴露在空氣中，照射樣品，開始進(jìn)入密閉箱，通過光柵，進(jìn)入DAD檢測器。 </p> <p> 好處：空白只需要檢測一次，如果你愿意一輩子檢測這一次都可以。檢測樣品不密閉，外界光線對其無影響，使用方便且精確。分析任何波段或全波段不到1s。 </p> <p> 缺點(diǎn)：貴。（25W）例如測試紫外區(qū)時(shí)則可關(guān)閉紫外分光光度計(jì)鎢燈；反之關(guān)閉氘燈。這樣就延長了那只不使用的光源燈的壽命。上海**紫外可見分光光度計(jì)代理</p><p style="text-indent:25px">在水質(zhì)的常規(guī)監(jiān)測中，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。低端紫外可見分光光度計(jì)賣價(jià)</p><p> 光學(xué)構(gòu)造（OPTICAL CONFIGURATION）一般來說，紫外光分光光度計(jì)分為單光束和雙光束兩類。顧名思義，單光束型主要是依賴單束光進(jìn)行測量。一束給定波長的光通過對照物，然后再通過實(shí)際樣品溶液，就能得到吸光結(jié)果。 </p> <p> 雙光束型則是通過一個(gè)斬光輪（mirrored chopper wheel）將一束光分成兩束，分別測量對照樣品和實(shí)際樣品?？蒑IN光漂移（lamp drift）和減少測量時(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代替，將一束光分成兩束平行的光然后同時(shí)測量對照樣品和目的樣品。因?yàn)樵黾恿藴y量的速度，所以雙光束分光光度計(jì)在測量一些溶液隨時(shí)間動(dòng)態(tài)變化的研究中大有用處。低端紫外可見分光光度計(jì)賣價(jià)</p><p style="text-indent:25px">上海儀電分析儀器有限公司位于徐塘路88號7幢4層、9幢，交通便利，環(huán)境優(yōu)美，是一家生產(chǎn)型企業(yè)。公司致力于為客戶提供安全、質(zhì)量有保證的良好產(chǎn)品及服務(wù)，是一家有限責(zé)任公司企業(yè)。公司業(yè)務(wù)涵蓋分光光度計(jì)，氣相色譜，原子吸收，食品安全，價(jià)格合理，品質(zhì)有保證，深受廣大客戶的歡迎。儀電分析將以真誠的服務(wù)、創(chuàng)新的理念、***的產(chǎn)品，為彼此贏得全新的未來！</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2050530.html</p></div></div></div></div></div><div id="unprifh" class="page-right twoColRt"><div id="u8si2n8" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="hgdah23" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="3sjgn7c" class="recomPic likePro"><a 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