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style="text-align:left;"><span>ARTICLE/</span> 技術(shù)文章</div> <div id="rd7ffxn" class="ny_pos"><a href="/">首頁</a> > <a href="/article.html">技術(shù)文章</a> > 揮發(fā)性有機(jī)物檢測儀的檢測器可分為以下類別</div> </div> <div id="rd7ffxn" class="news_detail"> <h1>揮發(fā)性有機(jī)物檢測儀的檢測器可分為以下類別</h1> <div id="rd7ffxn" class="nwdtl_tip"><span>更新時(shí)間：2021-03-23</span><span>瀏覽：668次</span></div> <div id="rd7ffxn" class="nwdtl_con"> <div>　　<strong><a href="http:///Products-35034372.html" target="_blank">揮發(fā)性有機(jī)物檢測儀</a></strong>是一款小型具數(shù)據(jù)采集功能的檢測儀，它可以連續(xù)檢測VOC氣體。在危險(xiǎn)地區(qū)、環(huán)境清潔或工業(yè)應(yīng)用中，當(dāng)VOC超過限值時(shí)發(fā)出警報(bào)，是一個(gè)十分方便的個(gè)人安全防護(hù)工具。</div><div>　　采樣單元采集現(xiàn)場的被測氣體，預(yù)處理單元對(duì)氣體進(jìn)行降溫、除濕、過濾粉塵，并將被測氣體的溫度和濕度恒定在定范圍，氣體檢測單元檢測分析被輸送過來的氣體，在顯示屏上實(shí)時(shí)顯示被測氣體濃度，并將數(shù)據(jù)信號(hào)向外傳輸?shù)絇LC或者電腦等終端，也可以通過無線GPRS或網(wǎng)絡(luò)傳輸?shù)皆品?wù)器，用戶再從服務(wù)器讀取數(shù)據(jù)，可以實(shí)現(xiàn)聯(lián)網(wǎng)監(jiān)控分析。</div><div>　　揮發(fā)性有機(jī)物檢測儀的檢測器可分為以下類別：</div><div>　　1、熱導(dǎo)檢測器（TCD）：基于不同物質(zhì)具有不同的熱導(dǎo)系數(shù)，幾乎對(duì)所有VOCs都有響應(yīng)，可以檢測各種VOCs，且樣品不被破壞，但靈敏度相對(duì)較低。</div><div>　　2、電子捕獲檢測器（ECD）：利用電負(fù)性物質(zhì)捕獲電子的能力，通過測定電子流進(jìn)行檢測。ECD具有靈敏度高、選擇性好，是目前分析痕量電負(fù)性有機(jī)化合物有效的檢測器。</div><div>　　3、氫火焰離子化檢測器（FID）：利用有機(jī)物在氫火焰的作用下化學(xué)電離而形成離子流，借測定離子流強(qiáng)度進(jìn)行檢測。檢測時(shí)樣品被破壞，一般只能檢測那些在氫火焰中燃燒產(chǎn)生大量碳正離子的有機(jī)化合物。</div><div>　　4、質(zhì)譜檢測器（MSD）：該型揮發(fā)性有機(jī)物檢測儀檢測器采用高速電子撞擊氣態(tài)分子或原子，將電離后的正離子加速導(dǎo)入質(zhì)量分析器中，按質(zhì)荷比（m/z）的大小順序進(jìn)行收集和記錄，是一種質(zhì)量型、通用型檢測器。</div><div>　　5、火焰光度檢測器（FPD）：對(duì)含硫和含磷的化合物有比較高的靈敏度和選擇性，當(dāng)含磷和含硫物質(zhì)在富氫火焰中燃燒時(shí)，分別發(fā)射具有特征的光譜，透過干涉濾光片，用光電倍增管測量特征光的強(qiáng)度。</div><div>　　希望上述內(nèi)容能夠幫助大家更好的了解本儀器。</div> 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