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URGcorp.com
Data Sheet for the Collection of
Formic Acid / Acetic Acid
Annular Denuder Collection Efficiency (E)
• URG-2000-30x150-3CSS:
99% at 10Lpm
(3 channel, 150mm length)
#47 Teflon® filter pack, 2 stage.
• URG-2000-30x242-3CSS:
99% at 16.7Lpm
(3 channel, 242mm length)
Operative Loading Capacity of Denuder
• 150mm 3 Channel Annular Denuder:
Formic Acid: >5080µg Dry >6956µg 80% RH
Acetic Acid: >1359µg Dry >2449µg 50% RH
Annular Denuder Coating:
KOH, NaOH, Na2CO3
Detection Limits
• Formic Acid: For a 3 hour sample, a detection limit of .05 ppb is possible
• Acetic Acid: For a 3 hour sample, a detection limit of .3 ppb is possible
Interfering Compounds
• Unknown
Annular Denuder Coating:
KOH, NaOH, Na2CO3
Coating Solution
•KOH (potassium hydroxide)/glycerol
•NaOH (sodium hydroxide)
•Na2CO3 (sodium carbonate)/glycerol
Extraction Solution
•Denuder is extracted with deionized water
Cyclone
Analysis
•Denuder: Analyze denuder extract via ion chromatography
Calculations
• TBD
Sampling Configuration for the
Collection of Formic Acid / Acetic Acid
Comments
• To account for artifacts of HCHO CH3 CHO the ambient concentrations
are determined by subtracting the amount determined on the 2nd denuder
from the amount collected on the 1st denuder.
116 S. Merritt Mill Road, Chapel Hill, NC 27516 USA | Phone: 919.942.2753 | Fax: 919.942.3522 | Email: [email protected]
Any technical advice or recommendation, written or verbal, made by URG or by any representative of URG concerning any use or application of
any product is believed to be reliable but the company makes no warranty, express or implied, of results to be obtained.