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#f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>分析檢測紫外可見分光光度計(jì)比較,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)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="2owkawc" 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="sa0qwu2" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="e4youiq" class="box"><p>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，分析檢測紫外可見分光光度計(jì)比較，有的近視沒辦法必須佩戴眼鏡，有的為了美觀，分析檢測紫外可見分光光度計(jì)比較，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，分析檢測紫外可見分光光度計(jì)比較。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-可見分光光度法是利用某些物質(zhì)的分子吸收200--800nm光譜區(qū)的輻射來進(jìn)行分析測定的方法。分析檢測紫外可見分光光度計(jì)比較</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="分析檢測紫外可見分光光度計(jì)比較,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593091764635/4502162.png"></div><p> 色譜技術(shù)比它起步晚了二百多年，但如今的色譜儀器（氣相、液相、氣質(zhì)、液質(zhì)）占了分析界的大半壁江山。相較璀璨如星的各類的色譜儀器，紫外-可見分光光度計(jì)黯然了很多。 </p> <p> 紫外-可見分光光度計(jì)可以被更精確更高級的檢測手段所取代？可以退出“分析史”的舞臺？ </p> <p> NO！NO！NO！ </p> <p> 事實(shí)上紫外-可見分光光度計(jì)（下文簡稱紫外分光光度計(jì)），依然是“分析舞臺”的美玉，低調(diào)有內(nèi)涵，親民有價(jià)值。一起來發(fā)現(xiàn)它在日化產(chǎn)品分析中的美和價(jià)值吧。原理分子的紫外可見吸收光譜是由于分子中的某些基團(tuán)吸收了紫外可見輻射光后，發(fā)生了電子能級躍遷而產(chǎn)生的吸收光譜。由于各種物質(zhì)具有各自不同的分子、原子和分子空間結(jié)構(gòu)，其吸收光能量的情況也就不會相同，因此，每種物質(zhì)都有其特有的、固定的吸收光譜曲線，可根據(jù)吸收光譜上某些特征波長處吸光度的高低判別或測定該物質(zhì)的含量，這就是分光光度定性和定量分析的基礎(chǔ)。上海**紫外可見分光光度計(jì)銷售廠家紫外分光光度計(jì)的光柵是一系列等寬、等距離的平行狹縫，以光的衍射現(xiàn)象和干涉現(xiàn)象為基礎(chǔ)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="分析檢測紫外可見分光光度計(jì)比較,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592155319523/9592810.png"></div><p> 使用紫外分光光度計(jì)的過程中，經(jīng)常會遇到儀器因光源達(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，因?yàn)閱喂馐鴥x器很忌諱空氣快速流動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整個(gè)燈座架，它下面有三個(gè)固定螺釘，先稍松后，移動前后位置再固定。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> 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(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(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> 傳統(tǒng)單光束UV紫外測試，測試過程全程封閉，單光束光源只通過光柵直接照射樣品，再經(jīng)光電倍增管檢測器檢測。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="分析檢測紫外可見分光光度計(jì)比較,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)條件設(shè)定 </p> <p> 在定量分析中，為了提高測定的靈敏度，入射光的波長應(yīng)選擇被測物的MAX吸收波長λmax，如果λmax有干擾，可選擇另一條靈敏度稍低、但能避免干擾的譜線，所以，適當(dāng)選擇入射光的波長，不僅能提高測定的靈敏度，還能提高測定的準(zhǔn)確度。 </p> <p> 狹縫寬度過大，入射光的單色性差；狹縫寬度太小，入射光的強(qiáng)減弱。狹縫寬度過大或過小均會造成靈敏度降低，選擇是產(chǎn)生MIN誤差情下的MAX狹縫。一般選用儀器的狹縫寬琶度應(yīng)小于待測樣品吸收帶的半寬度，否則測得的吸光度值會偏低，狹縫寬度的選擇應(yīng)以減少狹縫寬度時(shí)供試品的吸光度不再；加為準(zhǔn)，對于大部分被測品種，可以使用2nm縫寬。 </p> <p> 可通過控制被測物濃度或改變吸收池厚度來實(shí)現(xiàn)吸光度合理的范圍，以盡量減小測量誤差。一般吸光度盡量控制在0.1-0.8范圍。 </p> <p> 空白溶液是用來調(diào)節(jié)吸光度測量工作零點(diǎn)即A=0，T=100%的溶液，以消除溶液中其它基體組分以及吸收池和溶劑對入射光的反射和吸收所帶來的誤差。根據(jù)情況不同，常用空白溶液有如下幾種選擇。 </p> <p> <br /> 紫外分光光度法是根據(jù)物質(zhì)的吸收光譜，來研究物質(zhì)的成分、結(jié)構(gòu)和物質(zhì)間相互作用的有效手段。水質(zhì)紫外可見分光光度計(jì)代理</p><p style="text-indent:25px">紫外可見吸收光譜是由于分子中的某些基團(tuán)吸收了紫外可見輻射光后，發(fā)生了電子能級躍遷而產(chǎn)生的吸收光譜。分析檢測紫外可見分光光度計(jì)比較</p><p style="text-indent:25px">儀器儀表行業(yè)本身是一個(gè)加入，產(chǎn)出周期較長的行業(yè)，所以作為業(yè)內(nèi)廠家，一方面要尋找中、短期市場熱點(diǎn)，另一方面也要在產(chǎn)品、技術(shù)研發(fā)方面有長遠(yuǎn)的規(guī)劃;儀器儀表在工業(yè)生產(chǎn)過程中扮演著重要的角色，用到各種各樣的儀器儀表，如分光光度計(jì)，氣相色譜，原子吸收，食品安全等為工業(yè)的檢驗(yàn)、測量和計(jì)量提供技術(shù)支撐。儀器儀表應(yīng)用領(lǐng)域?qū)挿?，覆蓋了儀器儀表、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)。【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】等各方面，在國民經(jīng)濟(jì)建設(shè)各行各業(yè)的運(yùn)行過程中承擔(dān)著把關(guān)者和指導(dǎo)者的任務(wù)，儀器儀表制造行業(yè)可以分為通用儀表儀器制造、**儀器儀表制造、鐘表與計(jì)時(shí)儀器制造、光學(xué)儀器制造和衡器制造。儀器儀表在工業(yè)發(fā)展中具有重要作用，這也使得儀器儀表得到快讀發(fā)展。各行各業(yè)對儀器儀表的市場需求也在不斷提升，銷售企業(yè)正在發(fā)展中尋求技術(shù)創(chuàng)新和質(zhì)量提升。儀器儀表的質(zhì)量、性能關(guān)系到工業(yè)安全，必須重視。分析檢測紫外可見分光光度計(jì)比較</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。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，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各界的普遍認(rèn)可與大力支持。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2056330.html</p></div></div></div></div></div><div id="esiwcay" class="page-right twoColRt"><div id="2sqyeca" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="g2qyw4a" 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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