Ba methane ba (NMHC) yawanci yana nufin duk hydrocarbons masu ƙarfi ban da methane, wanda aka sani da non-methane total hydrocarbons. NMHC a cikin yanayi ya wuce wani mataki, yana da lahani ga lafiyar mutum, kuma yana iya samar da hayaki mai haske, yana haifar da haɗari ga muhalli da mutane.
Tsarin masana'antun matsayi na non-methane total hydrocarbons na kasar Sin na "Miƙar fitar da gurbataccen yanayi" (B1627-1996) shine 5mg / m³. Koxiao kamfanin, bisa ga tsarin da aka tsara a cikin edition na huɗu na "Air da kuma fitar da iskar gas saka idanu Hanyar", amfani da tsari ingantaccen tsari na goma hanyoyin bawul a lokaci guda samfurin biyu ginshike da kuma guda FID ganowa, saduwa da jimlar hydrocarbons da kuma non-methane jimlar hydrocarbons ganowa bukatun, zui low ganowa mataki ne 0.05mg / m³.

Non-methane jimlar hydrocarbon chromatographyAbubuwa:

Single FID saiti, kawar da biyu FID, saboda bambanci na FID da hankali ya haifar da kuskure.

Double cika ginshiƙi a layi daya, goma bawul sampling cimma daya sampling yayin nazarin jimlar hydrocarbons da methane.

2.gwaji kayan aiki

GC1690Gas chromatography (Hangzhou kexiao sinadarai kayan aiki Co., Ltd.);

JO-4Dalian);

3.gwajin tsari

3.1Sample sarrafawa

Tsarin sarrafawa na samfurin ya dace da Hanyar 1 na Hanyar Kulawa da iska da iskar gas (4th Edition). Amfani da 100ml gilashi alluga, hatimi alluga bayan filin samfurin.

3.2Chromatography yanayi

zafin jiki: 50 ℃
Mai ganowa zazzabi: 150 ℃
Sample zafin jiki: 150 ℃
Ƙididdigar samfurin: 1ml
Tsarin kwarara: 20ml / min

3.3Ingancin Nazarin

Samfurin shiga cikin ginshikin nazarin jimlar hydrocarbon, kawai fitar da jimlar hydrocarbon, sauran abubuwan da ke cikin samfurin ba za su iya rabuwa ba; Samfurin ya shiga cikin ginshikin binciken methane wanda zai iya raba methane da sauran abubuwa.

1.4Nazarin ƙididdiga

Methane a matsayin gas na yau da kullun, ta amfani da hanyar ƙididdigar yanki, sakamakon a cikin methane.

4.Sakamakon gwaji

4.1System dacewa gwaji

Ana amfani da 5μmol / mol (VN) methane daidaitaccen gas don bincike, sakamakon a cikin tebur 1

4.2Daidaitaccen curve

Ta amfani da 100ml gilashi alluga, high tsabta nitrogen step-by-step dilution hanyar da aka saita daban-daban matattarar: 5/10/20/50/100μmol / mol methane misali gas, bi da bi zuwa daidai adadin gas misali gas sampling bincike, da m yankin da daidai misali gas matattarar yi misali curve.

Ana bincika yanayin chromatography da aka ambata a sama don samun misali mai daidaitaccen zane-zane:4.3Binciken iska na dehydration

Saboda martani na O2 a FID yana da kyakkyawan tsoma baki ga jimlar binciken hydrocarbon, yana buƙatar amfani da iska na dehydration a matsayin blank, ainihin samfurin jimlar hydrocarbon yana buƙatar cire iska

Tsayawa. Binciken iska na dehydration don ganin Hoto na 4. Quantitative sakamakon duba Table 2

4.4Air samfurin analysis

Samun gwajin ciki iska tare da 10ml gilashi allura, kamar gas chromatography don bincike, spectrography duba Figure 5,3 maimaitawa bincike duba Table 3

Jimlar madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin mada Non-methane jimlar hydrocarbons = jimlar hydrocarbons-iska blank-methane = 4.60-1.74-2.40 = 0.45μmol / mol watau 0.32 / m³

1.ƙarshe

Amfani da hanyar da aka bayyana a wannan takarda zai iya saduwa da gwajin jimlar hydrocarbons da non-methane jimlar hydrocarbons a cikin iska, daidai da ƙa'idodin ƙasa bukatun, zui low ganowa mataki zai iya kai 0.05mg / m³.