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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>上海**紫外可見分光光度計(jì)銷售廠家,紫外可見分光光度計(jì)</p><p><span>***更新：</span>2020-11-19 09:19:07</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="sh889qh" 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="sm2ubxz" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="8bqx8mo" class="box"><p><p> 光學(xué)構(gòu)造（OPTICAL CONFIGURATION）一般來(lái)說，紫外光分光光度計(jì)分為單光束和雙光束兩類，上海**紫外可見分光光度計(jì)銷售廠家。顧名思義，單光束型主要是依賴單束光進(jìn)行測(cè)量。一束給定波長(zhǎng)的光通過對(duì)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(cè)量對(duì)照樣品和實(shí)際樣品，上海**紫外可見分光光度計(jì)銷售廠家?？蒑IN光漂移（lamp drift）和減少測(cè)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(lái)代替，將一束光分成兩束平行的光然后同時(shí)測(cè)量對(duì)照樣品和目的樣品。因?yàn)樵黾恿藴y(cè)量的速度，上海**紫外可見分光光度計(jì)銷售廠家，所以雙光束分光光度計(jì)在測(cè)量一些溶液隨時(shí)間動(dòng)態(tài)變化的研究中大有用處。由于玻璃材質(zhì)會(huì)吸收紫外線，所以目前市面上的紫外可見分光光度計(jì)都采用石英棱鏡。上海**紫外可見分光光度計(jì)銷售廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海**紫外可見分光光度計(jì)銷售廠家,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593893024301/8360761.png"></div><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(huì)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(shí)發(fā)現(xiàn)和排除這些隱患，對(duì)已產(chǎn)生的故障及時(shí)維修才能保證儀器設(shè)備的正常運(yùn)行。 </p> <p> 紫外可見分光光度計(jì)--使用經(jīng)驗(yàn) </p> <p> 若大幅度改變測(cè)試波長(zhǎng)，需稍等片刻，等燈熱平衡后，重新校正“0”和“100%”然后再測(cè)量。 </p> <p> 指針式儀器在未接通電源時(shí)，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(qǐng)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(dòng)燈泡及反光鏡燈，以免影響光效率。 </p> <p> 1900型等分光光度計(jì)，由于其光電接收裝置為光電倍增管，它本身的特點(diǎn)是放大倍數(shù)大，因而可以用于檢測(cè)微弱光電信號(hào)，而不能用來(lái)檢測(cè)強(qiáng)光。否則容易產(chǎn)生信號(hào)漂移，靈敏度下降。 </p> <p> 針對(duì)其上述特點(diǎn)，在維修、使用此類儀器時(shí)應(yīng)注意不讓光電倍增管長(zhǎng)時(shí)間暴露于光下，因此在預(yù)熱時(shí)，應(yīng)打開比色皿蓋或使用擋光桿，避免長(zhǎng)時(shí)間照射使其性能漂移而導(dǎo)致工作不穩(wěn)。分析檢測(cè)紫外可見分光光度計(jì)比較紫外分光光度計(jì)儀器使用一定周期后，由維修工程師或在工程師指導(dǎo)下定期開啟儀器外罩對(duì)內(nèi)部進(jìn)行除塵工作。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海**紫外可見分光光度計(jì)銷售廠家,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593808795839/2949755.png"></div><p> 分光光度計(jì)的帶寬（bandwidth）很大程度上依賴于單色儀的狹縫的寬度。可以投射出實(shí)驗(yàn)精確要求的光譜。一種嚴(yán)格帶寬使得儀器能對(duì)復(fù)雜的混合物進(jìn)行高分辨率的吸光測(cè)量?？勺兊膯紊珒x的狹縫寬度能使一臺(tái)分光光度計(jì)滿足多種實(shí)驗(yàn)需要。 </p> <p> 為了測(cè)量吸光值，分光光度計(jì)制造商通常使用光電倍增管（photo-multipliertubes，PMTs）和光敏二極管。PMTs提供快速的反應(yīng)時(shí)間和良好的靈敏度，并且可以在紫外光譜調(diào)節(jié)至特定的范圍。但一些制造商依賴于光敏二極管的動(dòng)態(tài)范圍在數(shù)秒內(nèi)行使所有的光譜測(cè)量。 </p><p> 紫外可見分光光度計(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，紫外可見分光光度計(jì)都有面向廣的應(yīng)用。 </p> <p> 紫外可見分光光度計(jì)校正 </p> <p> 開機(jī)預(yù)熱10分鐘足矣； </p> <p> 放入黑塊和標(biāo)樣（沒有的自己配），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> 紫外可見分光光度計(jì)使用注意事項(xiàng) </p> <p> 開機(jī)前應(yīng)先預(yù)熱15分鐘，然后開機(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。初次使用紫外可見分光光度計(jì)的人員，一般來(lái)說，一定要詳細(xì)閱讀儀器安全操作手冊(cè)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海**紫外可見分光光度計(jì)銷售廠家,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593139440396/4585287.png"></div><p> 紫外-可見分光光度計(jì)（UV）引用新型技術(shù)，其功能強(qiáng)大，采用單色器技術(shù)，波長(zhǎng)范圍190-1100nm，是各種涉及水和廢水分析領(lǐng)域的通用儀器，應(yīng)用范圍包括市政和工業(yè)廢水，飲用水，加工過程用水，地表水，冷卻水和鍋爐補(bǔ)給水等。 </p> <p> 在水和廢水監(jiān)測(cè)中的應(yīng)用，對(duì)于一個(gè)水系的監(jiān)測(cè)分析和綜合評(píng)價(jià)，一般包括水相（溶液本身）、固相（懸浮物、底質(zhì)）、生物相（水生生物）。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。由于水和廢水的成分復(fù)雜多變，待測(cè)物的濃度和干擾物的濃度差別很大，在具體分析時(shí)必須選擇好分析方法。 </p> <p> 在農(nóng)產(chǎn)品和食品分析中可用于檢測(cè)的組分或成分有蛋白質(zhì)、賴氨酸、葡萄糖、維生素C、硝酸鹽、亞硝酸鹽、砷、汞等; </p> <p> 在植物生化分析中可用于檢測(cè)葉綠素、全氮和酶的活力等； </p> <p> 在飼料分析中可用于檢測(cè)煙酸、棉酚、磷化氫和甲酯等。原理紫外可見吸收光譜主要產(chǎn)生于分子價(jià)電子在能級(jí)間的躍遷。利用一定頻率的紫外--可見光照射被分析的物質(zhì)，引起分子中價(jià)電子的躍遷，它將有選擇地被吸收。吸收光譜可以反映出物質(zhì)的特征。它對(duì)物質(zhì)進(jìn)行定性分析、定量分析及結(jié)構(gòu)分析,所依據(jù)的光譜是分子或離子吸收入射光中特定波長(zhǎng)的光而產(chǎn)生的吸收光譜。紫外可見分光光度計(jì)應(yīng)安裝在太陽(yáng)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。工廠紫外可見分光光度計(jì)經(jīng)銷商</p><p style="text-indent:25px">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。上海**紫外可見分光光度計(jì)銷售廠家</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(wú)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(gè)天平，凡是有化驗(yàn)、分析的地方都能用到它。那么，如何評(píng)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。試想，一臺(tái)外型呆板、做工粗糙的儀器，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(duì)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(zhǎng)的準(zhǔn)確度和重復(fù)性 </p> <p> <br /> </p> 上海**紫外可見分光光度計(jì)銷售廠家</p><p style="text-indent:25px">上海儀電分析儀器有限公司是一家生產(chǎn)型類企業(yè)，積極探索行業(yè)發(fā)展，努力實(shí)現(xiàn)產(chǎn)品創(chuàng)新。是一家有限責(zé)任公司企業(yè)，隨著市場(chǎng)的發(fā)展和生產(chǎn)的需求，與多家企業(yè)合作研究，在原有產(chǎn)品的基礎(chǔ)上經(jīng)過不斷改進(jìn)，追求新型，在強(qiáng)化內(nèi)部管理，完善結(jié)構(gòu)調(diào)整的同時(shí)，良好的質(zhì)量、合理的價(jià)格、完善的服務(wù)，在業(yè)界受到寬泛好評(píng)。以滿足顧客要求為己任；以顧客永遠(yuǎn)滿意為標(biāo)準(zhǔn)；以保持行業(yè)優(yōu)先為目標(biāo)，提供***的分光光度計(jì)，氣相色譜，原子吸收，食品安全。儀電分析自成立以來(lái)，一直堅(jiān)持走正規(guī)化、專業(yè)化路線，得到了廣大客戶及社會(huì)各界的普遍認(rèn)可與大力支持。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2056331.html</p></div></div></div></div></div><div id="7v4pr2m" class="page-right twoColRt"><div id="wl8das3" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="etf39lc" 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" 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