國產(chǎn)紫外可見分光光度計選擇來電咨詢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="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，國產(chǎn)紫外可見分光光度計選擇。如遇電壓正常而鎢燈不亮?xí)r，就需要更換鎢燈。更換時，不"><meta name="keywords" content="國產(chǎn)紫外可見分光光度計選擇,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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class="tigs"> 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="rnsufbt" class="searchbox"><div id="o22ufz9" class="searchLt"><div id="cljr43d" 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="imwn4ev" class="clearfix searchWrap"><div id="8c38ibv" 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="cbta4fh" 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 = 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class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593893024301/8360761.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="qerodhd" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593893024301/8360761.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="qu22k3t" 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>國產(chǎn)紫外可見分光光度計選擇,紫外可見分光光度計</p><p><span>***更新：</span>2020-11-11 01:19:37</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="xwdkeye" 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="tnkht3l" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="mwoq2m3" class="box"><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(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，國產(chǎn)紫外可見分光光度計選擇。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，國產(chǎn)紫外可見分光光度計選擇，安裝時用導(dǎo)線焊接，國產(chǎn)紫外可見分光光度計選擇，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。大部分單機(jī)型的分光光度計包含了驅(qū)動儀器運(yùn)行和管理數(shù)據(jù)的軟件。與PC機(jī)一起聯(lián)用，需要從制造商購買軟件。國產(chǎn)紫外可見分光光度計選擇</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國產(chǎn)紫外可見分光光度計選擇,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593893024301/8360761.png"></div><p> 分光光度計作為一種精密儀器，在運(yùn)行工作過程中由于工作環(huán)境、操作方法等種種原因，其技術(shù)狀況必然會發(fā)生某些變化，可能影響設(shè)備的性能，甚至誘發(fā)設(shè)備故障及事故。因此，分析工作者必須了解分光光度計的基本原理和使用說明，并能及時發(fā)現(xiàn)和排除這些隱患，對已產(chǎn)生的故障及時維修才能保證儀器設(shè)備的正常運(yùn)行。 </p> <p> 紫外可見分光光度計--使用經(jīng)驗 </p> <p> 若大幅度改變測試波長，需稍等片刻，等燈熱平衡后，重新校正“0”和“100%”然后再測量。 </p> <p> 指針式儀器在未接通電源時，電表的指針必須位于零刻度上。若不是這種情況，需進(jìn)行機(jī)械調(diào)零。 </p> <p> 比色皿使用完畢后，請立即用蒸餾水沖洗干凈，并用干凈柔軟的紗布將水跡擦去，以防止表面光潔度被破壞，影響比色皿的透光率。 </p> <p> 操作人員不應(yīng)輕易動燈泡及反光鏡燈，以免影響光效率。 </p> <p> 1900型等分光光度計，由于其光電接收裝置為光電倍增管，它本身的特點(diǎn)是放大倍數(shù)大，因而可以用于檢測微弱光電信號，而不能用來檢測強(qiáng)光。否則容易產(chǎn)生信號漂移，靈敏度下降。 </p> <p> 針對其上述特點(diǎn)，在維修、使用此類儀器時應(yīng)注意不讓光電倍增管長時間暴露于光下，因此在預(yù)熱時，應(yīng)打開比色皿蓋或使用擋光桿，避免長時間照射使其性能漂移而導(dǎo)致工作不穩(wěn)。氮?dú)庾贤饪梢姺止夤舛扔嬙趺礃幼贤饪梢姺止夤舛扔嬙陂_機(jī)前將樣品室內(nèi)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="國產(chǎn)紫外可見分光光度計選擇,紫外可見分光光度計" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396592216930546/1658567.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(zhǔn)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(jī)物質(zhì)，如果不干凈，就用有機(jī)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(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> 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。 </p><p style="text-indent:25px"><p>紫外可見分光光度計定量、定性分析需注意的問題<p>重復(fù)測定次數(shù)和波長掃描速度：對吸光度不是很大的樣品，或者狹縫不是很小，這是檢測器檢測的光信號的強(qiáng)度是比較大的，重復(fù)性較好，可選擇較少的重復(fù)次數(shù)。相反，如果樣品吸光度很大，狹縫很小，選擇較大的重復(fù)次數(shù)可獲得更好的結(jié)果。5測定波長間隔：在掃描光譜時需要選擇，可根據(jù)樣品吸收峰的寬度進(jìn)行選擇，峰寬較大時，可選擇較大的波長間隔。反之亦反。通常每個正常的吸收峰應(yīng)該用不少于30個數(shù)據(jù)點(diǎn)表示出來。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="國產(chǎn)紫外可見分光光度計選擇,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(qiáng)。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)。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。上海紫外可見分光光度計儀器</p><p style="text-indent:25px">在分光光度計的使用或檢定中,透射比(吸光度)的準(zhǔn)確度直接關(guān)系到所測數(shù)據(jù)的可信性及科學(xué)性。國產(chǎn)紫外可見分光光度計選擇</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。國產(chǎn)紫外可見分光光度計選擇</p><p style="text-indent:25px">上海儀電分析儀器有限公司致力于儀器儀表，是一家生產(chǎn)型的公司。儀電分析致力于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，一切以用戶需求為中心，深受廣大客戶的歡迎。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠信為本的理念，打造儀器儀表良好品牌。儀電分析憑借創(chuàng)新的產(chǎn)品、專業(yè)的服務(wù)、眾多的成功案例積累起來的聲譽(yù)和口碑，讓企業(yè)發(fā)展再上新高。</p></p><br 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