主题：【讨论】高纯气体的纯度最高可以达到多少?

原文由 KODI(SH104253) 发表:
高纯气体在不同的工艺中应用广泛。高纯气体的纯度对过程、结果都有直接的影响。根据技术水平的高低，能够生产出来的高纯气体纯度也层次不齐。以法液空为例，纯度最高可达99.99995%。

氮气kodi.cn
等级	纯度	杂质含量（体积分数）
ALPHAGAZ 1 N2	99.9995%	O2<1ppm H2<0.5 ppm CO<0.5ppm CO2<0.5ppm THC<0.1ppm H2O<2ppm
ALPHAGAZ 2 N2	99.9999%	O2<100 ppb  NO2<20ppb H2<50 ppb  N2O<20ppb CO<50 ppb  SO2<20 ppb CO2<50ppb  H2S<20ppb THC<50 ppb  NH3<20ppb CH4<50 ppb  H2O<400ppb NO<20 ppb
Research Grade N2	99.99995%	O2<50 ppb  NO2<10ppb H2<20 ppb  N2O<10ppb CO<30 ppb  SO2<10 ppb CO2<30ppb  H2S<10ppb THC<30 ppb  NH3<10ppb CH4<30 ppb  H2O<200ppb NO<10 ppb Particles＜0.1μm(30parts/ft3)

氢气kodi.cn
等级	纯度	杂质含量（体积分数）
ALPHAGAZ 1 H2	99.9995%	N2<2ppm O2+Ar<1ppm CO<0.5ppm CO2<0.5ppm THC<0.1ppm H2O<2ppm
ALPHAGAZ 2 H2	99.9999%	O2<100 ppb  NO2<20ppb N2<400 ppb  N2O<20ppb CO<50ppb  SO2<20ppb CO2<50 ppb  H2S<20ppb THC<50 ppb  NH3<20 ppb CH4<50 ppb  H20<400 ppb NO<20ppb
Research Grade H2	99.99995%	O2<50 ppb  NO2<10ppb N2<200 ppb  N2O<10ppb CO<30 ppb  SO2<10 ppb CO2<30ppb  H2S<10ppb THC<30 ppb  NH3<10ppb CH4<30 ppb  H2O<200ppb NO<10 ppb Particles＜0.1μm(30parts/ft3)

氩气kodi.cn
等级	纯度	杂质含量（体积分数）
ALPHAGAZ 1 Ar	99.9995%	N2<2ppm O2<1ppm H2<0.5ppm CO<0.3ppm CO2<0.3ppm THC<0.1ppm H2O<2ppm
ALPHAGAZ 2 Ar	99.9999%	O2<100ppb  NO<20ppb H2<50ppb  NO2<20ppb CO<50ppb  N2O<20ppb CO2<50ppb  SO2<20ppb THC<50ppb  H2S<20ppb CH4<50ppb  NH3<20ppb H2O<400ppb
Research Grade Ar	99.99995%	O2<50 ppb  NO2<10ppb H2<20ppb  N2O<10ppb CO<30 ppb  SO2<10 ppb CO2<30ppb  H2S<10ppb THC<30 ppb  NH3<10ppb CH4<30 ppb  H2O<200ppb NO<10 ppb Particles＜0.1μm(30parts/ft3)

氧气kodi.cn
等级	纯度	杂质含量（体积分数）
ALPHAGAZ 1 O2	99.9995%	N2<2ppm Ar<2ppm H2<0.5 ppm CO<0.5ppm CO2<0.5ppm THC<0.1ppm H2O<2ppm
ALPHAGAZ 2 O2	99.9999%	N2<100ppb  NO<20ppb Ar<200ppb  NO2<20ppb H2<50ppb  N2O<20ppb CO<50ppb  SO2<20ppb CO2<50ppb  H2S<20ppb THC<50ppb  NH3<20ppb CH4<50 ppb  H2O<400ppb
Research Grade O2	99.99995%	N2<200 ppb  NO<10 ppb Ar<200 ppb  NO2<10ppb H2<20ppb  N2O<10ppb CO<30 ppb  SO2<10 ppb CO2<30ppb  H2S<10ppb THC<30 ppb  NH3<10ppb CH4<30 ppb  H2O<200ppb Particles＜0.1μm(30parts/ft3)

氧气kodi.cn
等级	纯度	杂质含量（体积分数）
ALPHAGAZ 1 O2	99.9995%	N2<2ppm Ar<2ppm H2<0.5 ppm CO<0.5ppm CO2<0.5ppm THC<0.1ppm H2O<2ppm
ALPHAGAZ 2 O2	99.9999%	N2<100ppb  NO<20ppb Ar<200ppb  NO2<20ppb H2<50ppb  N2O<20ppb CO<50ppb  SO2<20ppb CO2<50ppb  H2S<20ppb THC<50ppb  NH3<20ppb CH4<50 ppb  H2O<400ppb
Research Grade O2	99.99995%	N2<200 ppb  NO<10 ppb Ar<200 ppb  NO2<10ppb H2<20ppb  N2O<10ppb CO<30 ppb  SO2<10 ppb CO2<30ppb  H2S<10ppb THC<30 ppb  NH3<10ppb CH4<30 ppb  H2O<200ppb Particles＜0.1μm(30parts/ft3)

空气kodi.cn
等级	纯度	杂质含量（体积分数）
ALPHAGAZ 1 Air	O2 20.5% +/- 0.5% abs N2 Balance  O2+N2 ≥99.9995%	CO<0.5ppm CO2<0.5ppm THC<0.1ppm H2O<2ppm
ALPHAGAZ 2 Air	O2 20.5% +/- 0.5% abs N2 Balance  O2+N2 ≥99.9999%	H2<50ppb NO2<20ppb CO<50ppb N2O<20ppb CO2<50ppb SO2<20ppb THC<50ppb H2S<20ppb CH4<50ppb NH3<20ppb NO<20ppb H2O<400ppb
Research Grade Air	O2 20.5% +/- 0.5% abs N2 Balance  O2+N2 ≥99.99995%	H2<20ppb      NO<10 ppb CO<30 ppb    NO2<10ppb CO2<30ppb    N2O<10ppb THC<30 ppb  SO2<10 ppb CH4<30 ppb  H2S<10ppb H2O<200ppb  NH3<10ppb Particles＜0.1μm(30parts/ft3)