ISO 25139 pdf download

ISO 25139 pdf download

ISO 25139 pdf download Stationary source emissions — Manual method for the determination of the methane concentration using gas chromatography
This lnternational Standard specifies a manual method for the determination of the concentration of methaneemissions from stationary sources.
This lnternational Standard specifies an independent method of measurement,which is validated for massconcentrations up to 1 500 mg/m3.
NOTE 1An independent method of measurement is used for such purposes as calibration or validation of permanenthinstalled measuring systems
NOTE 2An “independent method of measurement” is termed “standard reference method (SRM)” in EN 141815)
2 Normative references
The following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument (including any amendments) applies.
SO 9169,Air quality — Definition and determination of performance characteristics of an automaticmeasuring system
EN 15267-3,Air quality – Certification of automated measuring systems – Pat 3: Performance criteria andtest procedures for automated measuring systems for monitoring emissions from stationary sources
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
reference gas
(air quality> gas of known, reliable and stable composition
NOTEIn the context of this lnternational Standard, a reference gas is used to calibrate the gas chromatograph.
interfering substance
(air quality) substance present in the air mass under investigation, other than the measurand, that affects theresponse ISO 9169:2006,2.1.12]
mass concentration
stationary source emissions concentration of a substance in an emitted waste gas expressed as mass per volume
NOTE Mass concentration is often expressed in milligrams per cubic metre.
[ISO 25140:2010 [3] , 3.14]
uncertainty (of measurement)
parameter, associated with the result of a measurement, that characterizes the dispersion of the values that could reasonably be attributed to the measurand
[ISO/IEC Guide 98-3:2008 [4] , 2.2.3]
standard uncertainty
uncertainty of the result of a measurement expressed as a standard deviation
[ISO/IEC Guide 98-3:2008 [4] , 2.3.1]
4 Symbols and abbreviated terms
AMS automatic measuring system
FID flame ionization detector
FKM fluoro rubber
GC gas chromatograph
PE polyethylene
PET poly(ethylene terephthalate)
PLOT porous layer open tubular
PTFE polytetrafluoroethylene
QA/QC quality assurance and quality control
A peak area
5 Principle The sample gas is extracted from the waste gas duct via a sampling system and pumped into a gas-sampling bag or canister. A portion of the sample is taken off from the gas-sampling bag or canister and introduced into a gas chromatographic system. After separation on a packed or capillary column, methane is determined by means of a flame ionization detector.

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