This table was reviewed on 14 July 2022 and refers to the ISO 17034 scope (Issue No. 003) and ISO 17025 scope (Issue No. 057) for EffecTech.

 

Primary Reference Gas Mixtures

All PRGM mixtures are issued with an ISO 17025 certificate.

  

Certified Reference Materials

All CRM mixtures are issued with a ISO 17034 certificate and an ISO 17025 certificate. To find out why, see our page on calibration gas certificates.

  
component range calibration and measurement capability (CMC)* range ISO 17025 calibration and measurement capability (CMC)*  
  amount fraction (% mol/mol) amount fraction (% mol/mol) amount fraction (% mol/mol unless stated as ppm) amount fraction (% mol/mol unless stated as ppm)  
nitrogen 0.02 to 25 0.12% relative + 0.00034 0.1 to 22 0.25% relative +0.0005  
carbon dioxide 0.05 to 25 0.10% relative + 0.00006 0.05 to 15 0.18% relative + 0.0001  
methane 34 to 100 0.055 – 0.05% relative 34 to 100 0.11-0.10% relative  
ethane 0.1 to 35 0.12% relative + 0.00026 0.1 to 35 0.25% relative  
propane 0.05 to 20 0.15% relative + 0.00002 0.05 to 0.12 0.00035  
0.12 to 15 0.3% relative  
iso-butane 0.01 to 2 0.15% relative + 0.00011 0.01 to 0.15 0.00045  
0.15 to 2 0.3% relative  
n-butane 0.01 to 2 0.15% relative + 0.00011 0.01 to 0.15 0.00045  
0.15 to 2 0.3% relative  
neo-pentane 0.001 to 0.5 0.35% relative + 0.00005 0.002 to 0.35 0.7% relative + 0.0001  
iso-pentane 0.002 to 0.6 0.25% relative + 0.00005 0.005 to 0.35 0.5% relative + 0.0001  
n-pentane 0.002 to 0.6 0.25% relative + 0.00005 0.005 to 0.35 0.5% relative + 0.0001  
n-hexane 0.001 to 0.5 0.50% relative + 0.00005 0.001 to 0.35 1.0% relative + 0.0001  
2-methylpentane 0.001 to 0.35 0.65% relative + 0.00003 0.001 to 0.35 1.3% relative + 0.00005  
3-methylpentane 0.001 to 0.35 0.65% relative + 0.00003 0.001 to 0.35 1.3% relative + 0.00005  
2,2-dimethylbutane 0.001 to 0.35 0.65% relative + 0.00003 0.001 to 0.35 1.3% relative + 0.00005  
benzene 0.001 to 0.2 0.65% relative + 0.00003 0.001 to 0.2 1.3% relative + 0.00005  
cyclohexane 0.001 to 0.2 0.65% relative + 0.00003 0.001 to 0.2 1.3% relative + 0.00005  
n-heptane 0.001 to 0.2 0.65% relative + 0.00003 0.001 to 0.2 1.3% relative + 0.00005  
toluene 0.001 to 0.1 0.65% relative + 0.00003 0.001 to 0.1 1.3% relative + 0.00005  
methylcyclohexane 0.001 to 0.1 0.65% relative + 0.00003 0.001 to 0.1 1.3% relative + 0.00005  
n-octane 0.0005 to 0.05 0.65% relative + 0.00003 0.0005 to 0.05 1.3% relative + 0.00005  
n-nonane 0.0001 to 0.02 0.65% relative + 0.00003 0.0005 to 0.02 1.3% relative + 0.00005  
n-decane 0.0001 to 0.005 0.65% relative + 0.00003 0.0005 to 0.005 1.3% relative + 0.00005  
C6+ N/A 0.001 to 0.35 1.0% relative + 0.0001  
helium 0.005 to 0.2 0.85% relative + 0.00022 0.005 to 0.2 1.7% relative + 0.0004  
hydrogen 0.005 to 0.2 0.80% relative + 0.0002 0.005 to 0.2 1.7% relative + 0.0002  
0.2 to 20 0.25 % relative + 0.002  
oxygen N/A 0.05 to 3 0.4 % relative + 0.002 in-house method TM001
oxygen 0.2 to 20 1.6% relative + 0.1 ppm in-house method TM026
100ppm to 1000 ppm 0.9% relative + 0.5 ppm
0.1 to 1.0 0.7% relative + 1.0 ppm
1.0 to 22.5** 0.18% relative + 30 ppm
* The calibration and measurement capability is based on a standard uncertainty multiplied by a coverage factor k=2, providing a level of confidence of approximately 95%. The uncertainty evaluation has been carried out in accordance with UKAS requirements  
** The upper limit for oxygen may be limited due to restrictions in place required for the safe manufacture of such mixtures.  

Why ISO 17034?

Video – EffecTech’s Accredited Laboratory

About Calibration Gas Mixtures

ISO 17034 accredited certified reference materials are the industry-standard recommendation for customers.