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發(fā)信息做推廣就找產(chǎn)品網(wǎng)<br />企業(yè)電商信息綜合服務平臺 </span><div id="z9jtbzf" class="searchbox"><div id="7bxdthn" class="searchLt"><div id="lz7bdrp" class="tabs"><a href="JavaScript:;" data-type="product" class="active">產(chǎn)品</a><a href="JavaScript:;" data-type="member" class="">公司</a><a href="JavaScript:;" data-type="article" class="">資訊</a><a href="JavaScript:;" data-type="exhibition" class="">展會</a></div><div id="7vbrhd9" class="clearfix searchWrap"><div id="lpdj9f9" class="searchInput"><input type="text" name="keywords" placeholder="請輸入搜索關鍵詞" id="kd"><a href="javascript:void(0)" class="searchBtn" id="search">搜索</a></div></div></div></div></header><nav class="navbox"><div id="hnd7jpd" class="container"><ul><li id = "index_index"><a href="http://www.cdcfah.com/"><span>首頁</span></a></li><li id = "index_company"><a ><span>企業(yè)名錄</span></a></li><li id = "index_product"><a href="http://www.cdcfah.com/cp/"><span>產(chǎn)品供應</span></a></li><li id = "index_news"><a 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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="xr7zfnt" 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="5lrzxnb" 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)品關鍵詞：</span>手持紫外可見分光光度計對比,紫外可見分光光度計</p><p><span>***更新：</span>2020-11-07 05:21:12</p><p><span id="click" >瀏覽次數(shù)：4次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="rxvltzx" 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="p7l7zhf" class="page-proshow02"><p class="title">詳細說明</p><div id="7p7vvjp" class="box"><p><p> 光譜范圍紫外可見光譜區(qū)通常指190nm～780nm的波長范圍，但實際的分光光度計設計中，經(jīng)常將波長向長波方向拓展，進入短波近紅外區(qū)。在120多種國外產(chǎn)品中，有52種波長≤900nm，其中≤800nm的*11種。而>900nm的有72種，占了多數(shù)。固定光柵型受硅陣列探測器的限制，1100nm是其波長的上限。掃描光柵型使用分立光電器件，波長的擴展更為靈活。 </p> <p> 波長的準確性：*有16種偏差超過1nm，其余大多在01～1之間。其中突出的是Varian的Cary100/300，它們在6561nm處的波長準確性達到了002nm的水平。波長重復性大于05nm的*7種，01～05nm之間的占了多數(shù)，共有68種，還有相當數(shù)量的產(chǎn)品達到了優(yōu)于01nm的水平。如Agilent的8453(002)、Beckman的DU7000series(005)、Camspec的M400T/PC(005)、GBC的Centra10/20/40(004)、Hitachi的U3010/3310(005)、PerkinElmer的Lambda系列(002～005)、ScincoCO的S-1100/3130/3150(002)，手持紫外可見分光光度計對比，手持紫外可見分光光度計對比，手持紫外可見分光光度計對比、Shimadzu的MS1500(001)和UV1201(003)、Varian的Cary系列(0008～0025)等。雖然從原理上，固定光柵型的設計結構固定、簡單，易于實現(xiàn)好的波長準確性和重復性，但掃描光柵的設計制造工藝已十分成熟。大部分單機型的分光光度計包含了驅動儀器運行和管理數(shù)據(jù)的軟件。與PC機一起聯(lián)用，需要從制造商購買軟件。手持紫外可見分光光度計對比</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="手持紫外可見分光光度計對比,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593091764635/4502162.png"></div><p> 紫外可見分光光度計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物質，如果不干凈，就用有機溶劑，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。甲醇紫外可見分光光度計賣價紫外可見分光光度計主要由光源系統(tǒng)、單色器系統(tǒng)、樣品室、檢測系統(tǒng)組成。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="手持紫外可見分光光度計對比,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png"></div><p style="text-indent:25px">紫外分光光度計檢測器是將光信號轉變?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，而是將光強度轉換成電流進行測量，這種光電轉換器件稱為檢測器，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*靈敏度比普通光電管高，而且響應速度快，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展。</p><p style="text-indent:25px">紫外可見分光光度計的展望紫外可見分光光度計雖然是一類有著很長歷史的分析儀器，但每一次吸收了新的技術成果都使它煥發(fā)出新的活力。掃描光柵型分光光度計依托成熟的設計制造工藝，并結合計算機控制等新的技術成果，仍有很強的生命力。在很多方面，掃描型產(chǎn)品仍體現(xiàn)了技術水平。陣列式探測器的產(chǎn)生直接促成了固定光柵分光光度計的設計，使得它在測量地更快、更穩(wěn)定、適應性更強的方向邁出了一大步。并且，從今后的發(fā)展來看，儀器的小型化、在線化，測量的現(xiàn)場化、實時化將是一大方向。要使分光光度計走出實驗室，成為一種應用更廣，更為普及的測量分析設備，陣列式探測器以及其它的固態(tài)式設計可發(fā)揮重要的作用。光纖也將是其中的一項重要技術，它已使得紫外可見分光光度計的使用變得更方便，同時也使分光光度計的配置變得更靈活。光纖結合模塊化設計，可能使得分光光度計可以突破完全固定、靜態(tài)的組成，而變成可以自由搭配，自助式構建的儀器。光纖同時也是實現(xiàn)在線測量的重要手段。計算機技術的影響將更為增進。分光光度計的自動化、智能化是一個方面。另一方面，軟件已經(jīng)在一定程度上使實在的儀器接近了虛擬的程序，網(wǎng)絡和信息技術的結合可能帶來進一步的影響。紫外可見分光光度計在開機前將樣品室內的干燥劑取出，儀器自檢過程中禁止打開樣品室蓋。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="手持紫外可見分光光度計對比,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593808795839/2949755.png"></div><p> 雜散光：典型值是0.01～0.05%T，在國外的產(chǎn)品中有65種產(chǎn)品的雜散光指標在這一范圍中。雜散光超過0.05%T的產(chǎn)品有31種，小于0.01%T的產(chǎn)品有19種。。從其光學設計看，都采用了雙單色器。與掃描光柵型產(chǎn)品相比，固定光柵的分光光度計少了出射狹縫，實現(xiàn)低雜散光的難度更大。從性能指標來看，范圍是0.01～1%T。26種固定光柵型產(chǎn)品中雜散光在0.01～0.05%T之間的有13種，也已達到半數(shù)，但是能夠低于0.01%T的很少。波長準確性，國外的典型水平是0.1～1nm。國內產(chǎn)品中，處于此范圍的有16種，基本達到同一水平，但沒有優(yōu)于0.1nm的產(chǎn)品。國內產(chǎn)品的光度準確性大多以透過率表示，水平比較接近，均在0.3～0.5%T之間。在10%T處，也就是吸光度為1A處，將光度準確性以吸光度表示，則數(shù)值為0.013～0.021A。與國外產(chǎn)品有比較明顯的差距。國內產(chǎn)品的光度重復性基本在0.1～0.3%T范圍，同樣在吸光度1A處換算，數(shù)值為0.004～0.013A，也存在距離。比較國外與國內產(chǎn)品的雜散光的典型值，兩者幾乎相差了一個數(shù)量級。但是已有一些較新研發(fā)的產(chǎn)品，可以達到國外產(chǎn)品的普遍水準。分光光度法可以得出一些化學反應速度常數(shù)，并從兩個或兩個以上溫度條件下得到的速度數(shù)據(jù)，得出反應活化能。甲醇紫外可見分光光度計賣價</p><p style="text-indent:25px">紫外可見分光光度計應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。手持紫外可見分光光度計對比</p><p> 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。如遇電壓正常而鎢燈不亮時，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整光路。光源燈有兩個引線頭，安裝時用導線焊接，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。燈絲的位置要與入射狹縫平行并對準，上、下、左、右調節(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。一般調節(jié)鎢燈的位置時，將波長調到580nm處，狹縫調到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，可調光源燈底座位置。調整至白紙上可見明亮、均勻的長方形黃橙色光斑。手持紫外可見分光光度計對比</p><p style="text-indent:25px">上海儀電分析儀器有限公司總部位于徐塘路88號7幢4層、9幢，是一家儀器儀表、電子元器件及相關的系統(tǒng)集成的生產(chǎn)、服務及銷售，計算機軟件開發(fā)及銷售，從事貨物進出口及技術進出口業(yè)務?！疽婪毥?jīng)批準的項目，經(jīng)相關部門批準后方可開展經(jīng)營活動】儀器儀表、電子元器件及相關的系統(tǒng)集成的生產(chǎn)、服務及銷售，計算機軟件開發(fā)及銷售，從事貨物進出口及技術進出口業(yè)務?！疽婪毥?jīng)批準的項目，經(jīng)相關部門批準后方可開展經(jīng)營活動】的公司。儀電分析作為儀器儀表、電子元器件及相關的系統(tǒng)集成的生產(chǎn)、服務及銷售，計算機軟件開發(fā)及銷售，從事貨物進出口及技術進出口業(yè)務?！疽婪毥?jīng)批準的項目，經(jīng)相關部門批準后方可開展經(jīng)營活動】儀器儀表、電子元器件及相關的系統(tǒng)集成的生產(chǎn)、服務及銷售，計算機軟件開發(fā)及銷售，從事貨物進出口及技術進出口業(yè)務?！疽婪毥?jīng)批準的項目，經(jīng)相關部門批準后方可開展經(jīng)營活動】的企業(yè)之一，為客戶提供良好的分光光度計，氣相色譜，原子吸收，食品安全。儀電分析不斷開拓創(chuàng)新，追求出色，以技術為先導，以產(chǎn)品為平臺，以應用為重點，以服務為保證，不斷為客戶創(chuàng)造更高價值，提供更優(yōu)服務。儀電分析創(chuàng)始人湯志東，始終關注客戶，創(chuàng)新科技，竭誠為客戶提供良好的服務。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1884118.html</p></div></div></div></div></div><div id="kwmukaq" class="page-right twoColRt"><div id="gowmu0g" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="wu8agma" 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