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ZWIN-FVOCs10環(huán)境空氣非甲烷總烴監(jiān)測系統(tǒng)

ZWIN-FVOCs10環(huán)境空氣非甲烷總烴監(jiān)測系統(tǒng)

2024/08/12 VOCs 產(chǎn)品中心 669 0

功能參數(shù)

方法原理：GC-FID檢測技術(shù)
量程：0-5ppm
系統(tǒng)組成：采樣預(yù)處理系統(tǒng)、校準(zhǔn)系統(tǒng)、色諧儀分析系統(tǒng)和數(shù)據(jù)傳輸系統(tǒng)
監(jiān)測因子：甲烷、非甲烷總烴、氣象五參數(shù)
檢測器：氫火焰離子化檢測器(FID)

產(chǎn)品介紹產(chǎn)品彩頁原理介紹

環(huán)境空氣非甲烷總烴連續(xù)自動監(jiān)測系統(tǒng)滿足對廠區(qū)、廠界及周邊大氣污染物的監(jiān)測要求，系統(tǒng)由采樣總管、預(yù)處理單元、分析儀表、氫氣發(fā)生器、零氣發(fā)生器、空壓機、氣象參數(shù)、動態(tài)校準(zhǔn)儀、電控單元等組成，采用冷阱富集直接測量方法監(jiān)測非甲烷總經(jīng)有機物，具有檢出限低，重復(fù)性好的特點，適用于工業(yè)園區(qū)、區(qū)域性非甲烷總烴的監(jiān)測。

揮發(fā)性有機物（VOCs）檢測原理——氫火焰離子法（FID）

揮發(fā)性有機物的檢測原理是FID方法，F(xiàn)ID全稱為flameionizationdetector，翻譯為火焰離子化檢測儀，是一種高靈敏度通用型檢測器，它幾乎對所有的有機物都有響應(yīng)，而對無機物、惰性氣體或火焰中不解離的物質(zhì)等無響應(yīng)或響應(yīng)很小。

FID檢測技術(shù)是有機氣體檢測的一項有效方法。首先通過色譜柱對不同化合物進行分離，分離后的有機氣體被送入FID檢測器后，在檢測器氫火焰的高溫電離作用下，釋放出自由離子和電子。電子在FID檢測器的高壓電場向一端電極移動，在收集極形成微弱電流，電流的大小與單位時間進入檢測器的有機氣體質(zhì)量相關(guān)，在進樣時間中采集到的信號總量，即反應(yīng)了該有機氣體的含量。

FID，由Harley和Pretorious發(fā)明，演化自Scott發(fā)明的燃燒熱檢測儀（Heatof Combustion Detector）。FID用氫氣作為燃燒氣，其中摻有氦氣，氮氣等洗脫劑，在一個圓筒狀的電極里的噴嘴處燃燒。噴嘴與電極間電壓高達幾百伏，當(dāng)含碳溶質(zhì)在噴嘴處燃燒時，產(chǎn)生的電子/離子對被噴嘴和電極處收集起來產(chǎn)生電流，該電流被放大并傳送到記錄儀或電腦數(shù)據(jù)采集系統(tǒng)的A/D轉(zhuǎn)換器處。

FID

FID結(jié)構(gòu)圖

標(biāo)簽:VOC VOCs 上一篇: 智易時代數(shù)字式水中油傳感器-ZWIN-OIW1006 下一篇: 超低排放移動端小程序

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