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class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="ys7jovc" class="twoCol"><div id="sbysjqn" class="page-proshow clearfix"><p class="current"> 當(dāng)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(jì)</a>?高校紫外可見分光光度計(jì)代理誠信互利上海儀電分析儀器供應(yīng)</p><div id="e2h8xk3" class="leftbox clearfix"><h1>高校紫外可見分光光度計(jì)代理誠信互利上海儀電分析儀器供應(yīng)</h1><div id="gprifm2" class="proBig"><div id="i3mwyli" 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="3eb7jld" 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="o3cj8b9" 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>高校紫外可見分光光度計(jì)代理,紫外可見分光光度計(jì)</p><p><span>***更新：</span>2020-11-08 01:17:45</p><p><span id="click" >瀏覽次數(shù)：3次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="qzbtvse" 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="qfhzgxp" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="hrolx2b" class="box"><p><p> 使用紫外可見分光光度計(jì)時需要注意哪些方面？ </p> <p> 1、使用的吸收池必須潔凈，并注意配對使用。量瓶、移液吸管均應(yīng)校正、洗凈后使用。 </p> <p> 2、取吸收池時，手指應(yīng)拿毛玻璃面的兩側(cè)，裝盛樣品以池體的4/5為度，使用揮發(fā)性溶液時應(yīng)加蓋，透光面要用擦鏡紙由上而下擦拭干凈，檢視應(yīng)無溶劑殘留。吸收池放入樣品室時應(yīng)注意方向相同。用后用溶劑或水沖洗干凈，晾干防塵保存。 </p> <p> 3、供試品溶液濃度除各該品種已有注明外，其吸收度以在0.3～0.7之間為宜。 </p> <p> 4、測定時除另有規(guī)定外，應(yīng)以配制供試品溶液的同批溶劑為空白對照，采用1cm石英吸收池，在規(guī)定的吸收峰±2nm以內(nèi)，測幾個點(diǎn)的吸收度或由儀器在規(guī)定的波長附近自動掃描測定，以核對供試品的吸收峰位置是否正確，并以吸收度MAX的波長作為測定波長，除另有規(guī)定外吸收度MAX波長應(yīng)在該品種項(xiàng)下規(guī)定的測定波長±2nm以內(nèi)。 </p> <p> 5、供試品應(yīng)取2份，如為對照品比較法，對照品一般也應(yīng)取2份。平行操作，每份結(jié)果對平均值的偏差應(yīng)在±0.5%以內(nèi)。 </p> <p> 6，高校紫外可見分光光度計(jì)代理、選用儀器的狹縫寬度應(yīng)小于供試品吸收帶的半寬度，否則測得的吸收度值會偏低，狹縫寬度的選擇應(yīng)以減少狹縫寬度時供試品的吸收度不再增加為準(zhǔn)，對于大部分被測品種，高校紫外可見分光光度計(jì)代理，可以使用2nm縫寬。<span style="display:none;"></span> 分光光度法可以得出一些化學(xué)反應(yīng)速度常數(shù)，高校紫外可見分光光度計(jì)代理，并從兩個或兩個以上溫度條件下得到的速度數(shù)據(jù)，得出反應(yīng)活化能。高校紫外可見分光光度計(jì)代理</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高校紫外可見分光光度計(jì)代理,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592155319523/9592810.png"></div><p> 掌握紫外可見光分光光度計(jì)基本工作原理：一定頻率紫外可見光照射所需要分析的目標(biāo)樣品，引起目標(biāo)樣品中價電子發(fā)生躍遷，從而變現(xiàn)隨著吸收波長變化而引起光譜變化，形成可供分析數(shù)據(jù)。 </p> <p> 以朗伯-比耳定律(Lambert-beer)為理論基礎(chǔ)，特定波長吸收中，吸收程度正比于試樣成分濃度，因此，可進(jìn)行光譜的定性分析。且根據(jù)吸收與已知濃度標(biāo)樣比較，能進(jìn)行定量分析。 </p> <p> 紫外可見光分光光度計(jì)種類及優(yōu)缺點(diǎn)對比：傳統(tǒng)機(jī)型：單光束UV、全程密閉、以光柵進(jìn)行分光，標(biāo)樣和測試樣品分別測試，全波段掃描時間至多2min；比例雙光束UV：單光束UV，全程密閉、經(jīng)光柵再經(jīng)棱鏡，全程密閉、標(biāo)樣和測試樣品分別測試、測試靈敏度降低，全波段分析時間長。上海**紫外可見分光光度計(jì)銷售廠家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="高校紫外可見分光光度計(jì)代理,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png"></div><p> 紫外可見分光光度計(jì)的比色皿的洗滌方法 </p> <p> 1分光光度法中比色皿潔凈與否是影響測定準(zhǔn)確度的因素之一。因此，必須重視選擇正確的洗凈方法。 </p> <p> 俺的經(jīng)驗(yàn)是：要是你測定溶液是酸，如果不干凈，就用弱堿溶液洗，要是你測定溶液是堿，如果不干凈，就用弱酸溶液洗，要是你測定溶液是有機(jī)物質(zhì)，如果不干凈，就用有機(jī)溶劑，比如酒精等溶液洗。 </p> <p> 2選擇比色皿洗滌液的原則是去污效果好，不損壞比色皿，同時又不影響測定。 </p> <p> 2.1分析常用的鉻酸洗液不宜用于洗滌比色皿，這是因?yàn)閹谋壬笤谠撓匆褐杏袝r會局部發(fā)熱，致使比色皿膠接面裂開而損壞。同時經(jīng)洗液洗滌后的比色皿還很可能殘存微量鉻，其在紫外區(qū)有吸收，因此會影響鉻及其他有關(guān)元素的測定。 </p> <p> 一般主張使用硝酸和過氧化氫(5：1)的混合溶液泡洗，然后用水沖洗干凈。對一般方法難以洗凈的比色皿，還可以采取以下兩種方法。 </p> <p> 2.2先將比色皿侵入含有少量陰離子表面活性劑的碳酸鈉(20克/升)溶液泡洗，經(jīng)水沖洗后，再于過氧化氫和硝酸(5：1)混合溶液中侵泡半小時。 </p><p style="text-indent:25px"><p>綜合評價紫外可見光分光光度計(jì)儀器：根據(jù)使用領(lǐng)域進(jìn)行初步篩選，科研、制藥領(lǐng)域注重選擇光譜可調(diào)的紫外可見光分光光度計(jì)。其中，制藥中藥檢儀器要符合藥典規(guī)定，光譜帶寬要求為2nm以下。<p>重要性能指標(biāo)的考察，包括：光度準(zhǔn)確度，雜散光，光譜帶寬，穩(wěn)定性，噪聲，波長的準(zhǔn)確度和重復(fù)性是幾個重要指標(biāo)。各指標(biāo)間相互獨(dú)立有相互影響，需要綜合考量選購目標(biāo)紫外可見光分光光度計(jì)。<p>使用前，閱讀儀器使用說明書和做好儀器使用前的工程師培訓(xùn)。使用過程中，正確操作、認(rèn)真了解儀器指標(biāo)的物理意義和測試方法以及結(jié)合儀器使用中的相關(guān)設(shè)備的調(diào)試。掌握儀器的基本保養(yǎng)維護(hù)知識，建立相關(guān)指標(biāo)與分析測試結(jié)果之間的誤差影響條件，經(jīng)常檢測和調(diào)試儀器，確保儀器處在合適的工作狀態(tài)。光學(xué)構(gòu)造和光源、探測方法、樣品類型和數(shù)據(jù)處理等都是要考慮的因素。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高校紫外可見分光光度計(jì)代理,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594849245086/5585171.png"></div><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、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)就是一把尺子一個天平，凡是有化驗(yàn)、分析的地方都能用到它。那么，如何評價一臺紫外、可見分光光度計(jì)的優(yōu)劣呢? </p> <p> 要考察它的外觀。試想，一臺外型呆板、做工粗糙的儀器，怎么可能是一臺先進(jìn)的儀器呢? </p> <p> 我們探討一下會對儀器的使用有很大影響的幾個重要指標(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> 紫外光分光光度計(jì)分為單光束和雙光束兩類。單光束型主要是依賴單束光進(jìn)行測量。車載紫外可見分光光度計(jì)經(jīng)銷商</p><p style="text-indent:25px">現(xiàn)在的許多紫外分光光度計(jì)裝的是“長壽”型燈源，據(jù)說氘燈可達(dá)2000小時，鎢燈3000小時。高校紫外可見分光光度計(jì)代理</p><p> 分光光度計(jì)作為一種精密儀器，在運(yùn)行工作過程中由于工作環(huán)境、操作方法等種種原因，其技術(shù)狀況必然會發(fā)生某些變化，可能影響設(shè)備的性能，甚至誘發(fā)設(shè)備故障及事故。因此，分析工作者必須了解分光光度計(jì)的基本原理和使用說明，并能及時發(fā)現(xiàn)和排除這些隱患，對已產(chǎn)生的故障及時維修才能保證儀器設(shè)備的正常運(yùn)行。 </p> <p> 若大幅度改變測試波長，需稍等片刻，等燈熱平衡后，重新校正“0”和“100%”點(diǎn)。然后再測量。 </p> <p> 指針式儀器在未接通電源時，電表的指針必須位于零刻度上。若不是這種情況，需進(jìn)行機(jī)械調(diào)零。 </p> <p> 比色皿使用完畢后，請立即用蒸餾水沖洗干凈，并用干凈柔軟的紗布將水跡擦去，以防止表面光潔度被破壞，影響比色皿的透光率。 </p> <p> 操作人員不應(yīng)輕易動燈泡及反光鏡燈，以免影響光效率。高校紫外可見分光光度計(jì)代理</p><p style="text-indent:25px">上海儀電分析儀器有限公司擁有儀器儀表、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】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】等多項(xiàng)業(yè)務(wù)，主營業(yè)務(wù)涵蓋分光光度計(jì)，氣相色譜，原子吸收，食品安全。公司目前擁有專業(yè)的技術(shù)員工，為員工提供廣闊的發(fā)展平臺與成長空間，為客戶提供高質(zhì)的產(chǎn)品服務(wù)，深受員工與客戶好評。公司以誠信為本，業(yè)務(wù)領(lǐng)域涵蓋分光光度計(jì)，氣相色譜，原子吸收，食品安全，我們本著對客戶負(fù)責(zé)，對員工負(fù)責(zé)，更是對公司發(fā)展負(fù)責(zé)的態(tài)度，爭取做到讓每位客戶滿意。公司力求給客戶提供全數(shù)良好服務(wù)，我們相信誠實(shí)正直、開拓進(jìn)取地為公司發(fā)展做正確的事情，將為公司和個人帶來共同的利益和進(jìn)步。經(jīng)過幾年的發(fā)展，已成為分光光度計(jì)，氣相色譜，原子吸收，食品安全行業(yè)出名企業(yè)。</p></p><br /><p>文章來源地址: 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