蒸發(fā)光檢測器載氣為什么用氮?dú)?/title> <META NAME="Keywords" CONTENT="蒸發(fā)光檢測器載氣為什么用氮?dú)?> <META NAME="Description" CONTENT="普拉勒(南京)儀器科技有限公司是實(shí)驗(yàn)室前處理設(shè)備的主要供應(yīng)商,除了可為您提供優(yōu)質(zhì)的產(chǎn)品之外,普拉勒還會定期為大家介紹相關(guān)產(chǎn)品的技術(shù)知識,今日為大家?guī)?蒸發(fā)光檢測器載氣為什么用氮?dú)?"> <link type="text/css" rel="stylesheet" href="/skins/347685/css/style.css" /> <link rel="stylesheet" type="text/css" href="/skins/347685/css/swiper.min.css"> <script src="/skins/347685/js/jqueryNew.min.js"></script> <script src="/skins/347685/js/swiper.min.js"></script>  <script language="javascript" type="text/javascript"> var nav= '5'; </script>  <link rel="shortcut icon" href="/Skins/347685/favicon.ico" /> <script type="application/ld+json"> { "@context": "https://ziyuan.baidu.com/contexts/cambrian.jsonld", "@id": "http:///Article-2188120.html", "title": "蒸發(fā)光檢測器載氣為什么用氮?dú)?, "pubDate": "2020-04-22T10:52:04", "upDate": "2020-04-22T10:52:04" }</script> <script language="javaScript" 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class="NyNewDetail w1400"> <div id="xznnn7rt5r3f" class="NyNewDetail_Main"> <h1 class="NyNewDetail_Name"><img src="/skins/347685/images/nytitle_ico.png" />蒸發(fā)光檢測器載氣為什么用氮?dú)?/h1> <div id="xznnn7rt5r3f" class="detailmain"> <div id="xznnn7rt5r3f" class="NyNewDetail_Tips"> <span><img src="/skins/347685/images/ico04.png" />更新時間：2020-04-22</span><span><img src="/skins/347685/images/ico05.png" />點(diǎn)擊次數(shù)：3671</span> </div> <div id="xznnn7rt5r3f" class="NyNewDetail_Content" id="c_detail_wrap"> <span style="font-size: 14px;"> 　　蒸發(fā)光散射檢測器（elsd）是一種通用型的檢測器，可檢測揮發(fā)性低于流動相的任何樣品，而無需發(fā)色基團(tuán)。elsd靈敏度比示差折光檢測器高，對溫度變化不敏感，基線穩(wěn)定，適合與梯度洗脫液相色譜聯(lián)用。已被廣泛應(yīng)用于碳水化合物、類脂、脂肪酸、氨基酸、藥物以及聚合物等的檢測，尤其是中藥及中成藥的無紫外吸收的有效成分測定。</span><div><span style="font-size: 14px;">　　蒸發(fā)光檢測器原理：將柱洗脫液霧化形成氣溶膠，然后在加熱的漂移管中將溶劑蒸發(fā)，余下的不揮發(fā)性溶質(zhì)顆粒在光散射檢測池中得到檢測。</span></div><div><span style="font-size: 14px;">　　霧化蒸發(fā)檢測</span></div><div><span style="font-size: 14px;">　　經(jīng)hplc分離的柱洗脫液進(jìn)入霧化器，在此與穩(wěn)定的霧化氣體（推薦氮?dú)猓┗旌闲纬蓺馊苣z。氣溶膠由均勻分布的液滴組成，液滴大小取決于分析中采用的氣體流量。氣體流量越低形成的液滴越大，液滴越大則散射的光越多，從而提高了分析靈敏度，但是越大的液滴在漂移管中越難蒸發(fā)。每種方法均存在產(chǎn)生佳信號噪音比率的優(yōu)化氣體流量。流動相流速越低要求適當(dāng)霧化的氣體流量也越低。</span></div><div><span style="font-size: 14px;">　　載氣（推薦氮?dú)猓┌岩旱螐撵F化室運(yùn)送到漂移管進(jìn)行蒸發(fā)。在漂移管中，溶劑被除去，留下微粒或純?nèi)苜|(zhì)的小滴。蒸發(fā)光散射檢測器采用低溫蒸發(fā)模式，維持了顆粒的均勻性，對半揮發(fā)性物質(zhì)和熱敏性化合物同樣具有較好的靈敏度。</span></div><div><span style="font-size: 14px;">　　光源采用激光，溶質(zhì)顆粒從漂移管出來后進(jìn)入光檢測池，并穿過激光光束。被溶質(zhì)顆粒散射的光通過光電倍增管進(jìn)行收集。溶質(zhì)顆粒在進(jìn)入光檢測池時被輔助載氣所包封，避免溶質(zhì)在檢測池內(nèi)的分散和沉淀在壁上，極大增強(qiáng)了檢測靈敏度并極大地降低了檢測池表面的污染。</span></div><div><span style="font-size: 14px;">　　載氣如果用空氣，空氣屬于反應(yīng)氣體，可能跟分離出的組分，引起錯誤的結(jié)果。另外，很難保證空壓機(jī)出來的空氣的質(zhì)量。氮?dú)夥€(wěn)定，更適合。用氮?dú)庾鲚d氣可以提供樣品的重現(xiàn)性，提高分析的靈敏度。</span></div><div><span style="font-size: 14px;">　　使用氮?dú)怃撈?，更換頻率快，成本高，推薦使用普拉勒nitrogen-b-5/10蒸發(fā)光氮?dú)獍l(fā)生器。1-2年就收回氣瓶成本。</span></div><div><span style="font-size: 14px;">　　nitrogen-m-5/10技術(shù)規(guī)格</span></div><div><span style="font-size: 14px;">　　流量：0-5l（10l）/min@100psi（7bar）</span></div><div><span style="font-size: 14px;">　　工作環(huán)境：5°c-40°c濕度80%</span></div><div><span style="font-size: 14px;">　　純度：99.9-99.999%（*代替鋼瓶）</span></div><div><span style="font-size: 14px;">　　使用海拔：2200m</span></div><div><span style="font-size: 14px;">　　露點(diǎn)：<-55℃</span></div><div><span style="font-size: 14px;">　　顆粒：<0.01μm</span></div><div><span style="font-size: 14px;">　　滯留液體：無</span></div><div><span style="font-size: 14px;">　　鄰苯二甲酸：無</span></div><div><span style="font-size: 14px;">　　噪聲：<50db(a)</span></div><div><span style="font-size: 14px;">　　開機(jī)純化時間：30min</span></div><div><span style="font-size: 14px;">　　功率：700w</span></div><div><span style="font-size: 14px;">　　電力要求：220v50hz</span></div><div><span style="font-size: 14px;">　　尺寸：550×500×800mm（nitrogen-m-5）</span></div><div><span style="font-size: 14px;">　　550×500×900mm（nitrogen-m-10）</span></div><div><span style="font-size: 14px;">　　凈重：約45kg（nitrogen-m-5）</span></div><div><span style="font-size: 14px;">　　約50kg（nitrogen-m-10）</span></div> </div> <div id="xznnn7rt5r3f" class="ly_PrevNext"> <i><img src="/skins/347685/images/prev_icon.png" /></i> <ul> <li>上一篇：<a href="/Article-2188130.html">CVD，MOCVD專用氫氣發(fā)生器使用方法</a></li> <li>下一篇：<a href="/Article-2179993.html">進(jìn)口氮?dú)獍l(fā)生器在各行業(yè)中的應(yīng)用方法</a></li> </ul> </div> </div> </div> </div>   <div id="xznnn7rt5r3f" class="foot_box"> <div id="xznnn7rt5r3f" class="footCon"> <div id="xznnn7rt5r3f" class="foot_t w1400"> <div id="xznnn7rt5r3f" class="left"> <div id="xznnn7rt5r3f" class="foot_nav"> <ul> <li> <dt>關(guān)于我們</dt> <dd><a href="/aboutus.html">公司簡介</a></dd> <dd><a href="/aboutus.html#ab3">企業(yè)文化</a></dd> <dd><a href="/aboutus.html#ab2">榮譽(yù)資質(zhì)</a></dd> </li> <li> <dt>新聞中心</dt> <dd><a href="/news.html">新聞中心</a></dd> <dd><a href="/article.html">技術(shù)文章</a></dd> 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