№ lp_1_2_58059
Standard operating procedure describing laboratory methods for extracting and chromatographic analysis of DNPH-derivatized carbonyl compounds collected from ambient air as part of the EPA PAMS monitoring program.
Version: 1.0
Date: January 2020
Document type: Standard operating procedure
Program: Photochemical Assessment Monitoring Station (PAMS) Network
Organization: U.S. Environmental Protection Agency
Regulatory reference: 40 CFR Part 58 Appendix D, Section 5h
Related method: EPA Compendium Method TO-11A
Analytes: Carbonyl compounds
Sampling media: DNPH-impregnated silica gel cartridges
Analytical technique: HPLC or UHPLC with ultraviolet detection
Detection wavelength: Approximately 360 nm
Target compounds: Formaldehyde, acetaldehyde
Optional compounds: Acetone, benzaldehyde, additional listed carbonyls
Reporting system: EPA Air Quality System (AQS)
Storage conditions: Refrigerated and protected from light
Extraction solvent: Acetonitrile
Sample holding time: 14 days before extraction
Analysis holding time: 30 days after extraction
Laboratory scope: Analysis only; field collection addressed in companion SOP
Quality control elements: Method blanks, field blanks, laboratory control samples, calibration verification
Price: 8 / 10 USD
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