CES QAG - Model 825 - Multi-Metal Quantitative Aerosol Generator
The QAG creates an aerosol of known concentration by nebulizing a solution. The resulting droplets are carried out of the generation area to a drying chamber where they are dried to particles. The aerosol exiting the drying chamber contains known concentrations of analytes calculated from the QAG’s input parameters. The reference aerosol produced by the QAG is traceable-to-NIST standards and can be used to challenge and evaluate the accuracy, precision and linearity of measurement methods, such as ambient PM monitors & the Xact series of monitors, during certification and Relative Accuracy Test Audit (RATA).
- Approved by USA EPA for multi-metals CEMS audits and certifications
- Quantitative aerosol is traceable to NIST Standards
- Simultaneous generation of one or more elements
- Wide concentration range: ng/dscm to mg/dscm
- Automatic aerosol concentration reporting
- Single operator with minimal input requirements
Possible applications include evaluation, verification, audit and certifications of metals and PM measurement systems. It is applicable to both metal and non-metal species as well as generic PM aerosol. The QAG can be used for single concentration audits and stability evaluation of instrumentation, along with multi-point linearity checks and calibrations.
- Aerosol Generation Method.: Pneumatic nebulization
- Key applicable elements.: Hg, As, Pb, Cr, Cd, Co, Fe, Zn, Tl, Sb, Cu, Mn, Ni, V, Se, Ba, Br, Sr, Pd, Ag and more.
- Aerosol Concentration Range.: ng/dscm to mg/dscm
- Can spike flows.: up to 1000 lpm
- Calibration Period.: Most components require recalibration at least annually
- Percent relative difference.: 5%
- Linearity.: Correlation coefficient greater than 0.99
- Size and weight.: 4’ (W) x 4’ (D) x 7’ (H), 160 lbs assembled
- Range of operating temperatures.: 50 to 90 ºF
- Power requirements.: 120VAC/60 Hz, one- 20 amp circuirs (220VAC/60Hz with optional power converter)
- Inputs/Outputs.: All aerosol concentration available in .csv format
- Options.: Particulate matter, metals and non-metal species
Stability has been demonstrated through repeated use in the laboratory and in the field for over five years. The QAG can be operated by one user with minimal parameter inputs and control. The QAG is able to generate aerosols of most inorganic analytes including most hazardous elements in stack and fugitive emissions, as well as those present in the ambient environment. This instrument is the first quantitative aerosol generator to be approved by EPA for evaluating, validating and certifying continuous multi-metals CEMS used for compliance demonstration. The QAG greatly simplifies the certification and auditing of multi-metal CEMS and eliminates the need to compare multi-metal CEMS results to less precise and less accurate traditional multi-metal reference methods, such as EPA Reference Method 29.