Conditional Test Method 027 (CTM-027)
Procedure for Collection and Analysis of Ammonia (formerly EPA Method
206)
Method Overview
- • Isokinetic
- • M17 Type train
- • 0.1 N H2SO4 in first 2 or 3 impingers
- • HPLC with Suppressed Ion Chromatography
Target Compounds
- • Ammonia
- • Other cations such as calcium and sodium
Method Summary
- • A M17 train is charged with 200 mL of 0.1N H2SO4 in the
first and second impingers. For higher concentrations, also charge
the third impinger.
- • Clean up the impingers separately. If the concentration
of ammonia in the second impinger is greater than 10% of the concentration
of the first impinger, then analyze the third impinger.
- • Keep reagents cold after sampling.
- • Use polyethylene bottles for shipping impinger contents
to the lab.
- • Sulfate is removed from the sample in the lab by ion exchange
resin or the sample is diluted so that the sulfate concentration
is manageable.
- • Samples are analyzed by HPLC with conductivity detection.
Ion suppression is used to increase the sensitivity of the analysis.
Quality Assurance
- • Field blank
- • Audits available to agencies
- • Lab QA: Six point calibration curve
- • Second source standard used in laboratory to confirm calibration
Shipping Tips
- • H2SO4 is a hazardous material and must be shipped as such
(call for IATA Codes if you need them).
- • Ship samples cold.
- • Include a Chain of Custody for each cooler.
Enthalpy Experience
Enthalpy has been performing ammonia analysis for ~ 4 years. Enthalpy
uses a regenerating ion suppression system from Alltech Scientific
that greatly enhances the detection limit for ammonia.
