Bayanan samfurinSulfur hexafluoride (SF6) a matsayin gas mai ganowa, ana amfani da shi sosai a fasahar hana wuta a filin iska don gano tashoshin iska na yankin iska ko yankin wuta, yawan iska da kuma ƙayyade wurin tushen wuta a cikin yankin wuta. Binciken SF6 na gas, yafi amfani da chromatography, amfani da chromatograph tare da na'urar gano kama lantarki (ECD) don kammala ƙididdiga, mun zaɓi 1690E gas chromatograph don gwajin. Ka'idar: Mai gano kama lantarki shine nau'in mai gano mai zaɓi mai ƙwarewa, saboda siginar da aka samar ne kawai ga abubuwan da ke da ƙwayoyin lantarki (wanda ke nufin damar ƙwayoyin kwayoyin halitta ko ƙwayoyin halitta na kama lantarki don samar da ƙwayoyin halitta), yana dacewa da binciken abubuwan da ke dauke da ƙwayoyin halitta da abubuwan da ke dauke da O, S, N, P da sauran atoms, ƙwarewa yana ƙaruwa tare da haɓaka ƙarfin lantarki, don haka ana amfani da shi sosai a cikin binciken polyhalogen, polysulfur compounds. Babban fasali

A. gwaji yanayi

1, Kayan aiki: GC1690 gas chromatography mai ganowa (ciki har da ECD mai ganowa)
2, gwajin samfurin gas: SF6 misali gas 499ppm (Shanghai)
3, Mai ɗaukar gas: N2 mai tsabta (99,999%)
4, Chromatography tashar aiki (N2000)

2. gwaji matakai

1, daidaitaccen gas
SF6 Standard Gas SF6 Standard Gas Sampling Abubuwan da aka yi amfani da Air Conditioning
499ppm 0.1ml 100ml
4.99ppm 1ml 100ml
An fitar da wani adadi na SF6 daidaitaccen gas daidai da teburin da ke sama daban-daban, an tsara shi don SF6 da ake so kuma an haɗa shi daidai a cikin allura mai 100mL da aka saka da iska daban-daban.
2, kayan aiki yanayi
Chromatography ginshike: 5A kwayoyin siffa ginshike φ3mm × 0.5mm × 1m;
madaidaicin zafin jiki: 30-40 ℃; Gasification dakin zafin jiki: 100 ℃;
detector zafin jiki: 100 ℃; Sensitivity: Babban
Mai ɗaukar gas: Nitrogen (99.999%)
gudun gudun: 20-40mL / min; Samfurin yawa: 0.1ml
2.1 Zaɓin Chromatography
Saboda mai gano kama lantarki yana samar da sigina ne kawai ga abubuwan da ke da ikon kama lantarki, SF6 shine mafi ƙarfin kayan aiki, a cikin ainihin samfurin, kawai oxygen a cikin iska yana da ƙarfin ƙarfin lantarki, yana shafar ƙididdigar SF6 kai tsaye, don haka zaɓar 5A ya fi dacewa, saboda ikon 5A na kwayoyin halitta na shan O2 ya fi ikon shan SF6 ƙarfi, watau bayan O2 da SF6 a cikin samfurin iska ta hanyar ginshiƙin chromatography, ɓangaren da ke da ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙaranc
2.2 Zaɓin daukar gas gudun
Girman da kwanciyar hankali a kan bincike ne mafi girma, da gudun gudun kewayon yawanci zaɓi 20 ~ 40mL / min, amma ECD ne mai mayar da hankali iri mai bincike, da darajar amsa na ganowa daidai da mayar da hankali na abubuwa a cikin mai ɗaukar gas, ba shi da tasirin canje-canjen gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun gudun
2.3 Sakamakon bincike
Lokacin da matakan SF6 ya fi girma, SF6 yana samar da siginar da ke rufe ƙwanƙwasan O2, don haka ƙwanƙwasan SF6 a cikin ƙwanƙwasan chromatography na 499ppm na SF6 ya rufe wani ɓangare na O2, kamar ba a raba shi ba.

Peak tsayi, maimaitawa na peak yankin, duba tebur na ƙasa:

Yawan Nazarin	SF6tsayi	SF6Peak Area
1	9362	58759
2	9310	58087
3	9329	58331
4	9321	58232
5	9329	58398
6	9374	58791
7	9314	58042
8	9335	58553
9	9326	58150
10	9339	58424
11	9377	59054
RSD %	0.24	0.27

Peak tsayi, maimaitawa na peak yankin, duba tebur na ƙasa:

Yawan Nazarin	SF6tsayi	SF6Peak Area
1	1083	4417
2	1093	4408
3	1092	4447
4	1087	4418
5	1079	4363
6	1090	4437
7	1075	4436
RSD %	0.6	0.58

Daga sakamakon binciken da ke sama, za a iya samun daidaito mai inganci, maimaitawa a cikin 1%, sakamakon binciken yana da babban aminci.
2.4 Nazarin mafi ƙarancin ganowa mataki bisa ga lissafi, mafi ƙarancin ganowa mataki ne: 5.0 × 10-11, wato 50ppt.

III. Sakamakon tattaunawa

3.1 Chromatography aiki yanayi: 5A kwayoyin siffa, tsawon shafi 1m, ciki diamita φ2mm, lalacewa: 1; Mai ɗaukar gas: nitrogen mai tsabta; gudun gudun: 40ml / min; Samfurin yawa: 0.1ml
3.2 Ta hanyar lissafi, mu kayan aiki mafi ƙarancin ganowa mataki na SF6 ya kai 5.0 × 10-11, biyan bukatun ma'adinai na kwal aikace-aikace.