水質(zhì)紫外可見分光光度計代理誠信互利上海儀電分析儀器供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="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(shù)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(shè)計制造工藝，并結(jié)合計算機(jī)控制等新的技術(shù)成果，仍有很強(qiáng)的生命力。在很多方面，掃描型產(chǎn)品"><meta name="keywords" content="水質(zhì)紫外可見分光光度計代理,紫外可見分光光度計"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" 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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(wù)平臺 </span><div id="rihzgs8" class="searchbox"><div id="k2dvgxp" class="searchLt"><div id="cln8jie" 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="eipmtac" class="clearfix searchWrap"><div id="cqcub3l" class="searchInput"><input type="text" name="keywords" placeholder="請輸入搜索關(guān)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="38dp7ql" 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(yīng)</span></a></li><li id = "index_news"><a 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src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="s8wy38a" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="beyvx2x" 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>水質(zhì)紫外可見分光光度計代理,紫外可見分光光度計</p><p><span>***更新：</span>2020-11-19 09:19:07</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="fjgyk4q" 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="j3subvm" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="fzwya43" class="box"><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(shù)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(shè)計制造工藝，并結(jié)合計算機(jī)控制等新的技術(shù)成果，仍有很強(qiáng)的生命力。在很多方面，掃描型產(chǎn)品仍體現(xiàn)了技術(shù)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(shè)計，使得它在測量地更快、更穩(wěn)定、適應(yīng)性更強(qiáng)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(shí)時化將是一大方向。要使分光光度計走出實(shí)驗室，水質(zhì)紫外可見分光光度計代理，成為一種應(yīng)用更廣，更為普及的測量分析設(shè)備，陣列式探測器以及其它的固態(tài)式設(shè)計可發(fā)揮重要的作用。光纖也將是其中的一項重要技術(shù)，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(jié)合模塊化設(shè)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，水質(zhì)紫外可見分光光度計代理，自助式構(gòu)建的儀器。光纖同時也是實(shí)現(xiàn)在線測量的重要手段。計算機(jī)技術(shù)的影響將更為增進(jìn)。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(shí)在的儀器接近了虛擬的程序，網(wǎng)絡(luò)和信息技術(shù)的結(jié)合可能帶來進(jìn)一步的影響，水質(zhì)紫外可見分光光度計代理。分光光度法可以得出一些化學(xué)反應(yīng)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(yīng)活化能。水質(zhì)紫外可見分光光度計代理</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="水質(zhì)紫外可見分光光度計代理,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593771266494/7369055.png"></div><p> 常見的可見分光光度計和紫外可見分光光度計的型號有哪些? </p> <p> 可見分光光度計常見的有721系列，722系列和723系列。721系列可見分光光度計有721/721-100型，測定波長為360-800nm，分為分指針和數(shù)顯式兩種方式的顯示器。其中721-100型相對于721是型將測試樣品室加寬，可用10cm的比色皿，為糖廠**檢測儀器。722系列可見分光光度計有722/722S/722N型，測定波長為330-1000nm/325-1000nm。722型波長是330-1000nm，722S與722N的波長范圍325-1000nm，其中722N是自動調(diào)節(jié)波長。723系列可見分光光度計有723/723N/723PC/723PCS型四種，測定波長為320-1000nm，其中723是手動調(diào)整波長，723N是自動調(diào)波長，723PC配有掃描軟件，723PCS帶有掃描軟件和打印機(jī)。紫外可見分光光度計常見的是UV752/UV752N，波長范圍是195nm-1020nm。二者<span style="display:none;"></span>主要區(qū)別是UV752N可以選配打印機(jī)將數(shù)據(jù)輸出，其中在雜散光參數(shù)，光譜帶寬等方面還有細(xì)微的差別。分析檢測紫外可見分光光度計比較傳統(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="水質(zhì)紫外可見分光光度計代理,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png"></div>紫外可見分光光度計的基本結(jié)構(gòu) <p> 紫外可見分光光度計的工作原理是由光源發(fā)出連續(xù)輻射光，經(jīng)單色器按波長大小色散為單色光，單色光照射到吸收池，一部分被樣品溶液吸收，未被吸收的光經(jīng)檢測器的光電管將光強(qiáng)度變化轉(zhuǎn)變?yōu)殡娦盘栕兓?，并?jīng)信號顯示系統(tǒng)調(diào)制放大后，顯示或打印出吸光度A（或透射比T），完成測定。 </p> <p> 一、光源 </p> <p> 光源是提供符合要求的入射光的裝置，紫外可見分光光度計可見光區(qū)常用的光源為鎢燈，紫外光區(qū)常用的光源為氫燈或氘燈。 </p> <p> 1.1．鎢燈 </p> <p> 鎢燈是常用的可見光光源，它可發(fā)射的波長為325~2500nm的連續(xù)光譜，其中適宜的使用波長范圍為320~1000nm，因此，也可用做近紅外光源。電能將鎢燈加熱到白熾時，發(fā)出的光強(qiáng)度在各波段的分布隨燈絲溫度而變化。燈絲的溫度取決于電源電壓。電源電壓的微小波動都會引起鎢光強(qiáng)度的很大變化。因此必須使用穩(wěn)壓電源供電，鎢燈工作電壓為12V，也可以使用12V的直流電源供電。鎢燈的壽命一般可達(dá)10000小時以上。 </p> <p> 目前很多光度計采用鹵鎢燈代替鎢燈，如7230G型、752PLUS型分光光度計等。鹵鎢燈具有較高的發(fā)光效率和較長的使用壽命。 </p><p> 關(guān)于吸光度測定重復(fù)性的問題分光光度計在測定過程中，發(fā)現(xiàn)同一個溶液在不同時問里其測定結(jié)果不同，即重復(fù)性不好，其原因是什么?排除測定錯誤因素外，可能原因有：(1)儀器預(yù)熱時間不夠或預(yù)熱方法不對所造成，應(yīng)延長預(yù)熱時間或采用正確的預(yù)熱方法。 </p> <p> (2)光電轉(zhuǎn)換器(如光電管)因長時間使用其光電轉(zhuǎn)換效率發(fā)生了變化導(dǎo)致。這時標(biāo)準(zhǔn)溶液與待測溶液的吸光度都同樣變低，在相對定量時對結(jié)果影響很小。但是對這類儀器，一般建議連續(xù)使用時間不應(yīng)超過3h，若需長時間使用，間歇30min。紫外可見光分光光度計是使用紫外光譜特點(diǎn)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="水質(zhì)紫外可見分光光度計代理,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593808795839/2949755.png"></div><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(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?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(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。光學(xué)構(gòu)造和光源、探測方法、樣品類型和數(shù)據(jù)處理等都是要考慮的因素。水質(zhì)紫外可見分光光度計代理</p><p style="text-indent:25px">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(jìn)行測量。水質(zhì)紫外可見分光光度計代理</p>紫外可見分光光度計使用中常見問題解析 <p> 在一般分光光度計的使用說明書上，要求儀器預(yù)熱時間約20分鐘；若是帶微處理器的分光光度計，開機(jī)后儀器自動進(jìn)入自檢(初始化)狀態(tài)，約需1O分鐘左右。在分光光度計預(yù)熱這個環(huán)節(jié)上，很多使用者或多或少存在問題，如開機(jī)只預(yù)熱電路系統(tǒng)(不調(diào)節(jié)波長、打開吸收池暗箱蓋預(yù)熱等)或認(rèn)為初始化過程就是預(yù)熱等等。對帶微處理器有自檢功能的分光光度計，開機(jī)后儀器自檢(初始化)結(jié)束后，在測定窗口上，設(shè)置所需波長值，用一個吸收池裝上純凈水置于光路上，調(diào)“0000A”后，預(yù)熱儀器，當(dāng)儀器顯示讀數(shù)不再變化后即可進(jìn)行測定。 </p> <p> 對于紫外可見分光光度計，由于有雙光源(鎢燈與氘燈)，為了延長燈的使用壽命，開機(jī)自檢完成后可以關(guān)掉測定時不用的光源燈。水質(zhì)紫外可見分光光度計代理</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，良好的質(zhì)量、合理的價格、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，氣相色譜，原子吸收，食品安全。儀電分析自成立以來，一直堅持走正規(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: 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