ISO 17025 Accreditation of ISO 17025 Accreditation of Stack Gas Calibration Gas Mixtures The Air Quality and Emissions Show AQE 2013 AQE 2013 Telford, 13 th –14 th March 2013 Sant Celoni’s Specialty Gases Laboratory J A è Josep Aragonès Esteban Elías Dr. Gordon Ferrier 1
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ISO 17025 Accreditation of ISO 17025 Accreditation of Stack Gas Calibration Gas Mixtures
The Air Quality and Emissions Show AQE 2013 AQE 2013
Telford, 13th–14th March 2013
Sant Celoni’s Specialty Gases Laboratory
J A è Josep Aragonès
Esteban Elías
Dr. Gordon Ferrier
1
Industrial EmissionsIndustrial Emissions
European directives
- Greenhouse Gas EmissionsGreenhouse Gas EmissionsDirective 2003/87/EC and others
- The Waste Incineration Directive - The Waste Incineration Directive Directive 2000/76/EC
- Large Combustion Plants Directive Directive 2001/80/EC
Requirement for monitoring CO2, NOx, SO2, CO, TOC, HF, HCl
Analysis of NO/SO2/CO/CO2Analysis of NO/SO2/CO/CO2
The calibration of analysers using binary mixtures can often lead to errors
in the analysis of stack gases due to cross-sensitivity effects occurring within
the analysers
Errors due to cross sensitivity can prove expensive (e.g. during any
emissions trading process)g p )
Calibration using binary mixtures often requires a large number of
calibration cylinders and often do not take into account cross sensitivity
effects
There is therefore a need for suitable accredited multi-component
calibration gas mixtures. calibration gas mixtures.
Q tif i i t f (I)Quantifying cross interference (I)
A h
1) Preparation of several mixtures containing one possible interfering
Approach
1) Preparation of several mixtures containing one possible interfering
and the component to be analyzed.
I diff i In different concentrations.
In different ratios.
2) Calibration with binary standards.
3) Calculation of the interfering effect.
Q tif i i t f (II)Quantifying cross interference (II)
N2
NO/N2
Gas mixer Analyzer
CO2/N2
Q tif i iti it (III)Quantifying cross sensitivity (III)Analysis of constant levels of NO in the presence of varying levels of CO2Analysis of constant levels of NO in the presence of varying levels of CO2