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class="ny_tit ny_tit1"><img src="/Skins/434082/images/wz_tb.png"/><a href="/">網(wǎng)站首頁(yè)</a> ◇ <a href="/article.html">技術(shù)支持</a> ◇ VOC氣體檢測儀的零點(diǎn)校準要注意什么</div> <div id="yu22eic" class="inside_rnewscon"> <h1 class="newsname">VOC氣體檢測儀的零點(diǎn)校準要注意什么</h1> <li id="mia22m2" class="time" style="padding:15px 0; text-align:center; color:#b4b4b4;">更新日期：2022-10-31 信息來(lái)源：瀏覽次數：548</li> <ul class="dcont"> <p style="text-align: justify;"><div> <strong><a href="http://www.bivavg.com/SonList-2040639.html" target="_blank">VOC氣體檢測儀</a></strong>用于檢測環(huán)境里空氣中產(chǎn)生危害的那一類(lèi)揮發(fā)性有機物。VOC氣體檢測儀應用領(lǐng)域有大規模殺傷性化學(xué)毒劑檢測，劇毒危險品泄漏的緊急反應，室內空氣質(zhì)量（IAQ）中TVOC的檢測，個(gè)人保護裝備（PPE）確認等。VOC檢測儀一般有兩種原理:光離子化檢測器（PID）和火焰離子化檢測器（FID）。</div><div>　　VOC氣體檢測儀的零點(diǎn)校準：</div><div>　　在我們的空氣中，一般包含有10ppb~100ppb的有機蒸汽或者其他可以被紫外線(xiàn)（UV）離子化的化合物。在這個(gè)層面上，ppm級的PID檢測器（MP182）通常情況下是做不到的。VOC氣體檢測儀卻能夠輕松檢測到ppb水平的VOC。因此，在校零以及校零氣體的解決方案上，對于VOC檢測儀正常的工作在ppb范圍，是非常之重要的。</div><div>　　你知道嗎？通常的校零目的，就是確定重要氣體存在的背景信號。零點(diǎn)信號包括電子空白信號和校零環(huán)境新鮮空氣的信號。理論上講，在零點(diǎn)校準過(guò)程中，包括電子空白信號和校零環(huán)境新鮮空氣信號都應該被取消。所以，新鮮空氣應該被用作零點(diǎn)校準的校零氣體。</div><div>　　當VOC氣體檢測儀被介紹使用時(shí)，有許多關(guān)于高純零點(diǎn)空氣的便攜鋼瓶氣的有效性和穩定性。因此去避免它的不確定性。</div><div>　　以前的零點(diǎn)校準方案，當檢測的濃度在ppm級范圍，不會(huì )引起信號問(wèn)題，因為背景空氣的信號相對于要檢測的氣體信號來(lái)說(shuō)，是可以忽略不計的。然而，我們發(fā)現，全部校準后，檢測濃度在較低的ppb范圍，不同的檢測儀器在相同的空氣中有不同的檢測結果。這就是其原因。</div><div>　　因此，在紫外燈上的空氣信號就變得非常重要，也就是為什么，用不同的儀器，會(huì )有不同的空氣檢測值的原因。</div></p> </ul> <div class="ys2u0m0" id="news_sx"> <li id="ieom0m2" 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