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id="iabt9z2" class="searchbox"><div id="c23dkh3" class="searchLt"><div id="xjqkw3l" 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(huì)</a></div><div id="u7jk8v2" class="clearfix searchWrap"><div id="3722zik" class="searchInput"><input type="text" name="keywords" placeholder="請(qǐng)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="l9vhe9m" class="container"><ul><li id = "index_index"><a href="http://www.cdcfah.com/"><span>首頁(yè)</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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id="88fm38r" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="oik3pos" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="3xu2qik" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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(guó)產(chǎn)**紫外可見分光光度計(jì)性價(jià)比,紫外可見分光光度計(jì)</p><p><span>***更新：</span>2020-10-30 17:47:32</p><p><span id="click" >瀏覽次數(shù)：15次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="8wt4i3b" 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(hào)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="onfubfm" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="e38zvax" class="box"><p>紫外可見分光光度計(jì)使用中常見問題解析 <p> 在一般分光光度計(jì)的使用說明書上，要求儀器預(yù)熱時(shí)間約20分鐘；若是帶微處理器的分光光度計(jì)，開機(jī)后儀器自動(dòng)進(jìn)入自檢(初始化)狀態(tài)，約需1O分鐘左右。在分光光度計(jì)預(yù)熱這個(gè)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(zhǎng)、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(duì)帶微處理器有自檢功能的分光光度計(jì)，開機(jī)后儀器自檢(初始化)結(jié)束后，在測(cè)定窗口上，設(shè)置所需波長(zhǎng)值，用一個(gè)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(cè)定。 </p> <p> 對(duì)于紫外可見分光光度計(jì)，由于有雙光源(鎢燈與氘燈)，國(guó)產(chǎn)**紫外可見分光光度計(jì)性價(jià)比，為了延長(zhǎng)燈的使用壽命，國(guó)產(chǎn)**紫外可見分光光度計(jì)性價(jià)比，開機(jī)自檢完成后可以關(guān)掉測(cè)定時(shí)不用的光源燈，國(guó)產(chǎn)**紫外可見分光光度計(jì)性價(jià)比。紫外分光光度計(jì)一般覆蓋190nm和380nm波長(zhǎng)，通常利用氘燈照明。國(guó)產(chǎn)**紫外可見分光光度計(jì)性價(jià)比</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國(guó)產(chǎn)**紫外可見分光光度計(jì)性價(jià)比,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594874577336/8128483.png"></div><p style="text-indent:25px">使用紫外可見分光光度計(jì)進(jìn)行定量和定性分析需注意以下一些問題：1吸光度讀數(shù)范圍：吸光度測(cè)量誤差在透過率過大或過小時(shí)都會(huì)變大，為了滿足定量分析的誤差要求（<5%），在定量分析時(shí)要求吸光度應(yīng)在一定的范圍內(nèi)，這個(gè)范圍的具體值與儀器性能有關(guān)，主要是與紫外可見分光光度計(jì)檢測(cè)系統(tǒng)噪聲大小有關(guān)，但通常都在0.1~1.0范圍內(nèi)，如果儀器的檔次更低，則范圍更窄。根據(jù)朗伯比爾定律，影響吸光度大小的因素主要是樣品摩爾吸光系數(shù)，濃度和比色皿光程。實(shí)驗(yàn)中吸光度過大的樣品可通過稀釋樣品使吸光度到所需范圍內(nèi)。如果樣品不能稀釋，可以改用光程較小的比色皿減小吸光度。吸光度過小的樣品可使用光程較大的比色皿以增大吸光度。國(guó)產(chǎn)**紫外可見分光光度計(jì)性價(jià)比紫外可見分光光度計(jì)，可以通過更換光源分別形成可見和紫外光區(qū)，測(cè)定的波長(zhǎng)在200～1000nm。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國(guó)產(chǎn)**紫外可見分光光度計(jì)性價(jià)比,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396594919157259/9098588.png"></div><p> 定性定量。利用特定的吸收峰，快速對(duì)待測(cè)樣品進(jìn)行定性和定量分析。如聚六亞甲基雙胍鹽酸鹽的檢測(cè)。利用雙波長(zhǎng)，以很快的速度辨別是單胍還是雙胍，并進(jìn)行粗略定量。這是液相色譜無(wú)論如何也做不到的。 </p> <p> 測(cè)定透過率。透光率是一個(gè)物理詞匯，是表示光線透過介質(zhì)的的能力，是透過透明或半透明物體的光通量與其入射光通量的百分率。吸光度與透過率的換算公式 </p> <p> 透過率對(duì)于某些原料檢測(cè)是非常實(shí)用的，可對(duì)此類原料品質(zhì)進(jìn)行總體把控。 </p> <p> 雜質(zhì)的檢測(cè)。通過前處理將雜質(zhì)與主成分分離后，進(jìn)行紫外分光光度測(cè)定，可很快得到該雜質(zhì)的含量。以桑普實(shí)驗(yàn)室這十幾年對(duì)苯氧乙醇中雜質(zhì)苯酚的測(cè)定方法改進(jìn)過程為例： </p> <p> 之后建立了4-氨基安替比林比色法，可實(shí)現(xiàn)對(duì)苯氧乙醇含量20、40、60、80、100ppm的區(qū)分；紫外分光光度法 </p> <p> 期間同時(shí)采用EP中紫外分光光度法，并將其進(jìn)行適當(dāng)改進(jìn)，作為修訂后的企標(biāo)。該方法便利快速，可實(shí)現(xiàn)50ppm以上的定量檢測(cè)。HPLC-DAD </p> <p> 近兩年，桑普對(duì)產(chǎn)品品質(zhì)把控更嚴(yán)格，希望能實(shí)現(xiàn)幾個(gè)ppm的定量檢測(cè)。所以采用了HPLC-DAD作為企標(biāo)對(duì)其檢測(cè)。 </p><p> 紫外分光光度計(jì)做不準(zhǔn)？比色皿出錯(cuò)了唄。一文了解比色皿的正確使用，配對(duì)，洗滌。 </p> <p> 比色皿（cuvette）是一種用于光譜分析的裝備儀器。常用的主要是由石英粉燒制的石英比色皿和普通硅酸鹽光學(xué)玻璃制成的透光面比色皿。 </p> <p> 當(dāng)然也有微量、半微量、熒光等比色皿出現(xiàn)。 </p> <p> 石英比色皿（Q/S）：適用波長(zhǎng)范圍在190nm-2500nm（適用于紫外、可見、近紅外光區(qū)）價(jià)格較玻璃比色皿較貴 </p> <p> 玻璃比色皿（G）：適用波長(zhǎng)范圍320nm-2500nm（不適用于紫外光區(qū)），價(jià)格相對(duì)便宜 </p> <p> 由上述數(shù)據(jù)可以看出石英比色皿完全可以代替玻璃比色皿使用，如果不用紫外區(qū)的話，用普通玻璃比色皿就行了，一則浪費(fèi)沒必要，二則，嘿嘿，摔碎了也不心疼。至于微量、半微量、熒光等比色皿不常用就不在說了。測(cè)量吸光度并不是測(cè)量透過吸收池的光強(qiáng)度，而是將光強(qiáng)度轉(zhuǎn)換成電流進(jìn)行測(cè)量，稱為紫外分光光度計(jì)的檢測(cè)器。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="國(guó)產(chǎn)**紫外可見分光光度計(jì)性價(jià)比,紫外可見分光光度計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/ydfx123/637396593980700101/5381945.png"></div>你的眼鏡真的防紫外嗎？紫外分光光度計(jì)告訴你 <p> 市場(chǎng)上的眼鏡多種多樣，有的近視沒辦法必須佩戴眼鏡，有的為了美觀，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(hào)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(lái)說話，很簡(jiǎn)單的方法，只要我們有一臺(tái)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(wú)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(zhǎng)掃描，間隔1nm就可以了，節(jié)約時(shí)間可以設(shè)置為間隔2nm?？諝庾隹瞻讙呙韬螅瑢⒏餮坨R放置在比色皿的位置，目的是讓光能穿過眼鏡，再波長(zhǎng)掃描。 </p> <p> <br /> 目前市場(chǎng)上有兩類主流紫外分光光度計(jì)產(chǎn)品:掃描光柵式分光光度計(jì)和固定光柵式分光光度計(jì)。建材紫外可見分光光度計(jì)選擇</p><p style="text-indent:25px">實(shí)驗(yàn)室選擇時(shí)需要根據(jù)自己實(shí)驗(yàn)室的需要和目的用途來(lái)考慮。國(guó)產(chǎn)**紫外可見分光光度計(jì)性價(jià)比</p><p> 752N紫外可見分光光度計(jì)產(chǎn)品介紹 </p> <p> 該產(chǎn)品采用微處理機(jī)控制技術(shù)在紫外可見光譜區(qū)域內(nèi)對(duì)物質(zhì)作定性、定量分析，是常規(guī)實(shí)驗(yàn)室必備的多用途分析儀器。 </p> <p> 主要特點(diǎn)： </p> <p> ●全息閃耀光柵單色器，具有波長(zhǎng)精度高，單色性好，雜散光低等優(yōu)點(diǎn)。 </p> <p> ●全新液晶屏顯示，讀數(shù)清晰自然。 </p> <p> ●采用微機(jī)測(cè)量系統(tǒng)，T-A轉(zhuǎn)換精度高，并有自動(dòng)調(diào)0％T和調(diào)100％T，濃度因子設(shè)定、濃度直讀。 </p> <p> ●測(cè)量讀數(shù)準(zhǔn)確性高，重現(xiàn)性好和穩(wěn)定性佳。 </p> <p> ●自動(dòng)光門技術(shù)，操作便捷。 </p> <p> 選配： </p> <p> ●熱敏繪圖打印機(jī) </p> <p> ●專用光譜軟件 </p> <p> ●5cm或10cm比色皿架國(guó)產(chǎn)**紫外可見分光光度計(jì)性價(jià)比</p><p style="text-indent:25px">上海儀電分析儀器有限公司位于徐塘路88號(hào)7幢4層、9幢。公司自成立以來(lái)，以質(zhì)量為發(fā)展，讓匠心彌散在每個(gè)細(xì)節(jié)，公司旗下分光光度計(jì)，氣相色譜，原子吸收，食品安全深受客戶的喜愛。公司秉持誠(chéng)信為本的經(jīng)營(yíng)理念，在儀器儀表深耕多年，以技術(shù)為先導(dǎo)，以自主產(chǎn)品為重點(diǎn)，發(fā)揮人才優(yōu)勢(shì)，打造儀器儀表良好品牌。儀電分析立足于全國(guó)市場(chǎng)，依托強(qiáng)大的研發(fā)實(shí)力，融合前沿的技術(shù)理念，飛快響應(yīng)客戶的變化需求。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/1776765.html</p></div></div></div></div></div><div id="las4ryq" class="page-right twoColRt"><div id="v7877js" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="gvxmj4u" 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" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="pkhry4d" 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