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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>?石油紫外可見分光光度計性價比歡迎來電上海儀電分析儀器供應(yīng)</p><div id="esayuiw" class="leftbox clearfix"><h1>石油紫外可見分光光度計性價比歡迎來電上海儀電分析儀器供應(yīng)</h1><div id="2aemk8k" class="proBig"><div id="g8cii8o" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593091764635/4502162.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="eksqwus" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593091764635/4502162.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="uqg00oy" 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>石油紫外可見分光光度計性價比,紫外可見分光光度計</p><p><span>***更新：</span>2020-11-13 03:18:46</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="28ca2ui" 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(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="0ycsyms" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="0qomca8" class="box"><p><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，石油紫外可見分光光度計性價比。到1918年，美國國家標(biāo)準(zhǔn)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(jìn)，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(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，石油紫外可見分光光度計性價比，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，石油紫外可見分光光度計性價比。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 /> 紫外分光光度計可用于藥品的鑒別、純度檢查及含量測定，既可以定性分析，又可以定量分析。石油紫外可見分光光度計性價比</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="石油紫外可見分光光度計性價比,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593091764635/4502162.png"></div><p style="text-indent:25px">紫外分光光度計檢測器是將光信號轉(zhuǎn)變?yōu)殡娦盘柕难b置。測量吸光度時，并非直接測量透過吸收池的光強度，而是將光強度轉(zhuǎn)換成電流進(jìn)行測量，這種光電轉(zhuǎn)換器件稱為檢測器，又叫接受器。常用的檢測器有光電池、光電管、光電倍增管及光電二極管陣列檢測器等。光電池價格便宜，但長時間曝光，會使靈敏度降低。光電管的靈敏度比光電池高；光電倍增管不僅靈敏度比普通光電管高，而且響應(yīng)速度快，目前中、高性能分光光度計中一般采用它作為檢測器。光電二極管陣列檢測器是紫外可見分光光度計檢測的一個重要進(jìn)展。雙光束紫外可見分光光度計多少錢目前市場上有兩類主流紫外分光光度計產(chǎn)品:掃描光柵式分光光度計和固定光柵式分光光度計。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="石油紫外可見分光光度計性價比,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png"></div><p> 紫外分光光度計--注意事項 </p> <p> 1．該儀器應(yīng)放在干燥的房間內(nèi)，使用時放置在堅固平穩(wěn)的工作臺上，室內(nèi)照明不宜太強。熱天時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，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)。 </p><p> 紫外可見分光光度計的特點分光光度法對于分析人員來說，可以說是常用和有效的工具之一。幾乎每一個分析實驗室都離不開紫外可見分光光度計。分光光度法具有以下主要特點。 </p> <p> 1靈敏度高 </p> <p> 由于新的顯色劑的大量合成，并在應(yīng)用研究方面取得了可喜的進(jìn)展，使得對元素測定的靈敏度有所推進(jìn)，特別是有關(guān)多元絡(luò)合物和各種表面活性劑的應(yīng)用研究，使許多元素的摩爾吸光系數(shù)由原來的幾萬提高到數(shù)十萬。 </p> <p> 2選擇性好 </p> <p> 目前已有些元素只要利用控制適當(dāng)?shù)娘@色條件就可直接進(jìn)行光度法測定，如鈷、鈾、鎳、銅、銀、鐵等元素的測定，已有比較滿意的方法了。 </p> <p> 3準(zhǔn)確度高 </p> <p> 對于一般的分光光度法，其濃度測量的相對誤差在1～3%范圍內(nèi)，如采用示差分光光度法進(jìn)行測量，則誤差可減少到0.X%。 </p> <p> 4適用濃度范圍廣 </p> <p> 可從常量(1%～50%)(尤其使用示差法)到痕量(10-8～10-6%)(經(jīng)預(yù)富集后)。 </p> <p> 5分析成本低、操作簡便、快速、應(yīng)用廣 </p> <p> 由于各種各樣的無機物和有機物在紫外可見區(qū)都有吸收，因此均可借此法加以測定。到目前為止，幾乎化學(xué)元素周期表上的所有元素(除少數(shù)放射性元素和惰性元素之外)均可采用此法。在國際上發(fā)表的有關(guān)分析的論文總數(shù)中，光度法約占28%，我國約占所發(fā)表論文總數(shù)的33%。紫外可見分光光度計應(yīng)安裝在太陽不能直接曬到的地方，以免“室光” 太強，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="石油紫外可見分光光度計性價比,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png"></div><p> 紫外可見分光光度計是一類很重要的實驗室分析儀器，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面向廣的應(yīng)用。 </p> <p> 紫外可見分光光度計校正 </p> <p> 開機預(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> 把燈光對著黑塊，把透光度調(diào)0； </p> <p> 把燈光對標(biāo)樣，將吸光度調(diào)到100%。 </p> <p> 紫外可見分光光度計使用注意事項 </p> <p> 開機前應(yīng)先預(yù)熱15分鐘，然后開機自檢； </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。并且避免陽光直接照射。因為增加了測量的速度，所以雙光束分光光度計在測量一些溶液隨時間動態(tài)變化的研究中大有用處。飼料紫外可見分光光度計多少錢</p><p style="text-indent:25px">在大部分的樣品類型中，分光光度計可接受樣品孔、小玻璃管cuvette、吸漿管和微孔板。石油紫外可見分光光度計性價比</p><p> 進(jìn)行單波長測量時，需要考慮朗伯比爾定律對入射光單色性的要求和測定靈敏度的要求。沒有干擾時，一般選擇在吸收峰的MAX吸收波長位置處，如果有干擾，選擇在沒有干擾且吸光度變化較平緩的位置。進(jìn)行多波長校正時，除盡量滿足單波長測定的波長要求外，還要求多個組分間的吸收光譜間線性無關(guān)。 </p> <p> 紫外分光光度計狹縫的大小會影響到儀器的信噪比和標(biāo)準(zhǔn)曲線的線性范圍。狹縫過大，通常會使線性范圍變小，特別是當(dāng)不在MAX吸收波長位置測定時更是如此。狹縫過小，信噪比變差，基線平直度和測量數(shù)據(jù)的重復(fù)性會變差。此外，還需要考慮樣品吸收峰寬度的影響。通常單波長測定時，一般選擇在MAX吸收波長位置，線性范圍容易滿足，可選擇較寬的狹縫（1~2nm）多波長測定時，很難同時在所有波長都滿足線性范圍要求，應(yīng)選擇比較小的狹縫。石油紫外可見分光光度計性價比</p><p style="text-indent:25px">上海儀電分析儀器有限公司主營品牌有儀電分析,上分，發(fā)展規(guī)模團(tuán)隊不斷壯大，該公司生產(chǎn)型的公司。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)。公司擁有專業(yè)的技術(shù)團(tuán)隊，具有分光光度計，氣相色譜，原子吸收，食品安全等多項業(yè)務(wù)。儀電分析順應(yīng)時代發(fā)展和市場需求，通過**技術(shù)，力圖保證高規(guī)格高質(zhì)量的分光光度計，氣相色譜，原子吸收，食品安全。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1966540.html</p></div></div></div></div></div><div id="uousymk" class="page-right twoColRt"><div id="muka0io" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="ge8g0c0" 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" 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