Abstract Submission - Erkki Lamminen - Dekati Ltd
Simultaneous PM10 And PM2.5 Measurement From Stacks According to New ISO 23210 Standard.
A new ISO standard 23210 for simultaneous measurement of PM10 and PM2.5 will be finalized during 2009. The method is based on the principle of impaction and is designed for stack measurements at stationary emission sources. Due to the principle of the method, it is especially suitable for mass concentrations below 50mg/m^3 and the collected PM can be used for further chemical analysis. A cascade impactor is used to enable the simultaneous measurement of PM10 and PM2.5. The PM10 and PM2.5 collection efficiency curves for the impactor stages are as specified in the ISO 7708:1995. The particulate matter is collected on quartz filters which are weighed before and after the PM collection to find the amount of PM in each size fraction. It is recommended in the standard, that the impactor is placed in the stack directly against the flue gas flow. Goose-neck and out-stack sampling is allowed only if extensive loss analysis is done and the deposited material is carefully retrieved from the probe. The requirements for the impactor are set so that the measurement results with any two complying systems are comparable. The collection efficiency curves of the impactor stages must be measured with solid particles. In addition, paired field measurements must be conducted to check the variation within a certain impactor type. This new international standard is an important step in providing standards that allow more detailed particulate emissions measurement. In this paper, the scope, requirements and the limitations of the standard will be presented along with comprehensive certification results for the Dekati PM10 impactor.
