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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_fenxiyiqi/">分析儀器</a>?<a href="http://www.cdcfah.com/cp/third-fenxiyiqi_zwfxy/">紫外分析儀</a>?生產(chǎn)紫外可見分光光度計差價推薦咨詢上海儀電分析儀器供應(yīng)</p><div id="hz9xtrd" class="leftbox clearfix"><h1>生產(chǎn)紫外可見分光光度計差價推薦咨詢上海儀電分析儀器供應(yīng)</h1><div id="lxvrpdl" class="proBig"><div id="97rxnbh" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594849245086/5585171.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="zpndj7t" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594849245086/5585171.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="njxdb77" 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>生產(chǎn)紫外可見分光光度計差價,紫外可見分光光度計</p><p><span>***更新：</span>2020-12-24 01:13:21</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="n77ft75" 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="pbzp9hf" class="page-proshow02"><p class="title">詳細說明</p><div id="zpnthnr" class="box"><p><p> 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> 分析常用的鉻酸洗液不宜用于洗滌比色皿，這是因為帶水的比色皿在該洗液中有時會局部發(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> 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> 紫外可見分光光度計的比色皿的洗滌方法 </p> <p> 分光光度法中比色皿潔凈與否是影響測定準確度的因素之一。因此，必須重視選擇正確的洗凈方法。 </p> <p> 俺的經(jīng)驗是：要是你定溶液是酸，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，生產(chǎn)紫外可見分光光度計差價，生產(chǎn)紫外可見分光光度計差價，要是你測定溶液是有機物質(zhì)，如果不干凈，生產(chǎn)紫外可見分光光度計差價，就用有機溶劑，比如酒精等溶液洗。 </p> <p> <br /> 紫外光分光光度計分為單光束和雙光束兩類。單光束型主要是依賴單束光進行測量。生產(chǎn)紫外可見分光光度計差價</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="生產(chǎn)紫外可見分光光度計差價,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594849245086/5585171.png"></div><p> 原子吸收分光光度計（AAS）：分析定量金屬原子（除冷原子），利用高溫使原子獲得能量變?yōu)榧ぐl(fā)態(tài)，當原子回歸到基態(tài)時用相應(yīng)的我陰極燈照射來檢測含量。主要分火焰法、石墨爐法和氫化物發(fā)生器法。 </p> <p> 紅外：紅外分近紅外、中紅外和遠紅外三種儀器。 </p> <p> 近紅外：用來定性不對稱的官能團，從而定性某種化學(xué)物質(zhì)。紅外的原理是紅外光所產(chǎn)生高能給予分子，分子產(chǎn)生震動，從振幅來檢測官能團。所以，不對稱，是前提。對稱了就看不出振幅了。一般多為手持式。 </p> <p> 中紅外：俗稱的紅外，用來定性或定量不對稱官能團，從而定性或定量某種化學(xué)物質(zhì)。相比于近紅外增加了可以定量的技能！尤其是對同分異構(gòu)體的定量由為明顯！原理還是震動。沒有手持式。 </p> <p> 遠紅外：實驗室一般沒有。建材紫外可見分光光度計設(shè)備紫外可見光分光光度計是使用紫外光譜特點而設(shè)計制造的光學(xué)儀器。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="生產(chǎn)紫外可見分光光度計差價,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592216930546/1658567.png"></div><p style="text-indent:25px">使用紫外分光光度計的過程中，經(jīng)常會遇到儀器因光源達不到要求，需要進行調(diào)修。要求光源燈處不能有空氣流動，因為單光束儀器很忌諱空氣快速流動而使光源燈的色溫發(fā)生變化。燈絲的位置要與入射狹縫平行并對準，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，因為多數(shù)燈絲離燈頭偏高。調(diào)整燈位置的前后可移動整個燈座架，它下面有三個固定螺釘，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，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。如遇電壓正常而鎢燈不亮?xí)r，就需要更換鎢燈。更換時，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。光源燈有兩個引線頭，安裝時用導(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。在焊接時防止焊點與燈頭銅皮碰上，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。</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準曲線的線性范圍。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。進行單波長測量時，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> <span style="display:none;"></span> 分光光度計元器件方面，經(jīng)歷了棱鏡、機刻光柵和全息光柵，商品化的全息閃耀光柵已迅速取代一般刻劃光柵。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="生產(chǎn)紫外可見分光光度計差價,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594919157259/9098588.png"></div><p> 兩者有所同，又有所不同。定量分析的原則同，而測量所需的光能量不同： </p> <p> 原子吸收為X射線，能量大，可激發(fā)電子從低的原子軌道向高的原子軌道躍遷. </p> <p> 紫外可見吸收為紫外光及可見光，能量小，只能激發(fā)電子從分子軌道向MAX低（或次低）的空的分子軌道躍遷。 </p> <p> 通俗的說，原子吸收分光光度計是用較高的溫度來燃燒分子，使之原子化（變?yōu)榛鶓B(tài)原子），再通過特征輻射，把基態(tài)原子激發(fā)，并吸收能量，通過這個能量差（透過率）來計算出濃度。而紫外—可見分光光度計是通過顯色劑（一種能和我們被測元素產(chǎn)生絡(luò)合反應(yīng)的分子），與我們的被測元素產(chǎn)生反應(yīng)，并且反應(yīng)物分子帶有特定的顏色，經(jīng)過分子吸收氘燈（紫外區(qū)）或鎢燈（可見區(qū)）的照射，吸收燈發(fā)射的能量，通過能量差（透過率）來計算出濃度。原子吸收分光光度計與紫外可見分光光度計的區(qū)別介紹 </p> <p> 原理： </p> <p> 原子吸收觀察的是構(gòu)成物質(zhì)的元素（原子）中的電子在原子軌道中的躍遷，屬于原子吸收. </p> <p> 紫外可見光吸收觀察的是構(gòu)成物質(zhì)的分子中的電子在分子軌道中的躍遷，屬于分子吸收. </p> <p> 能量: 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)的輻射來進行分析測定的方法。水質(zhì)紫外可見分光光度計現(xiàn)貨</p><p style="text-indent:25px">紫外分光光度計（UV Spectrophotometer）在實驗室長期在分析領(lǐng)域扮演很重要的角色。生產(chǎn)紫外可見分光光度計差價</p><p style="text-indent:25px">經(jīng)過幾十年的發(fā)展，我國已經(jīng)成為世界上第二大儀器儀表制造國，儀器儀表產(chǎn)業(yè)形成了一定的規(guī)模，儀器儀表產(chǎn)品也比較豐富。目前，分光光度計，氣相色譜，原子吸收，食品安全等產(chǎn)品的產(chǎn)量居世界前列，實驗分析儀器等中產(chǎn)品的市場占比不斷上升，行業(yè)技術(shù)上總體已達到的中等國際水平，少數(shù)產(chǎn)品接近或達到當前較高國際水平。儀器儀表應(yīng)用領(lǐng)域?qū)挿海采w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，計算機軟件開發(fā)及銷售，從事貨物進出口及技術(shù)進出口業(yè)務(wù)?！疽婪毥?jīng)批準的項目，經(jīng)相關(guān)部門批準后方可開展經(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，計算機軟件開發(fā)及銷售，從事貨物進出口及技術(shù)進出口業(yè)務(wù)?！疽婪毥?jīng)批準的項目，經(jīng)相關(guān)部門批準后方可開展經(jīng)營活動】等各方面，在國民經(jīng)濟建設(shè)各行各業(yè)的運行過程中承擔(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、鐘表與計時儀器制造、光學(xué)儀器制造和衡器制造。從銷售廣義角度來說，儀器儀表也可具有自動操控、報警、信號傳遞和數(shù)據(jù)處理等功能，例如用于工業(yè)生產(chǎn)過程自動操控中的氣動調(diào)節(jié)儀表，和電動調(diào)節(jié)儀表，以及集散型儀表操控系統(tǒng)也皆屬于儀器儀表。生產(chǎn)紫外可見分光光度計差價</p><p style="text-indent:25px">上海儀電分析儀器有限公司主要經(jīng)營范圍是儀器儀表，擁有一支專業(yè)技術(shù)團隊和良好的市場口碑。公司業(yè)務(wù)分為分光光度計，氣相色譜，原子吸收，食品安全等，目前不斷進行創(chuàng)新和服務(wù)改進，為客戶提供良好的產(chǎn)品和服務(wù)。公司從事儀器儀表多年，有著創(chuàng)新的設(shè)計、強大的技術(shù)，還有一批**的專業(yè)化的隊伍，確保為客戶提供良好的產(chǎn)品及服務(wù)。儀電分析秉承“客戶為尊、服務(wù)為榮、創(chuàng)意為先、技術(shù)為實”的經(jīng)營理念，全力打造公司的重點競爭力。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2533073.html</p></div></div></div></div></div><div id="7fbfjxl" class="page-right twoColRt"><div id="lr9bpvb" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="xtrhfbh" 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配件哪家強信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="br9tbpd" class="recomPic likePro"><a 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