Table B-3 to Subpart B of Part 53—Interferent Test Concentration, 1 Parts per Million
| Pollutant | Analyzer type 2 | Hydro-chloric acid | Ammonia | Hydrogen sulfide | Sulfur dioxide | Nitrogen dioxide | Nitric oxide | Carbon dioxide | Ethylene | Ozone | M-xylene | Water vapor | Carbon monoxide | Methane | Ethane | Naphthalene |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SO2 | Ultraviolet fluorescence | 5 0.1 | 4 0.14 | 0.5 | 0.5 | 0.5 | 0.2 | 20,000 | 6 0.05 | |||||||
| SO2 | Flame photometric | 0.01 | 4 0.14 | 750 | 3 20,000 | 50 | ||||||||||
| SO2 | Gas chromatography | 0.1 | 4 0.14 | 750 | 3 20,000 | 50 | ||||||||||
| SO2 | Spectrophotometric-wet chemical (pararosanaline) | 0.2 | 0.1 | 0.1 | 4 0.14 | 0.5 | 750 | 0.5 | ||||||||
| SO2 | Electrochemical | 0.2 | 0.1 | 0.1 | 4 0.14 | 0.5 | 0.5 | 0.2 | 0.5 | 3 20,000 | ||||||
| SO2 | Conductivity | 0.2 | 0.1 | 4 0.14 | 0.5 | 750 | ||||||||||
| SO2 | Spectrophotometric-gas phase, including DOAS | 4 0.14 | 0.5 | 0.5 | 0.5 | 0.2 | ||||||||||
| O3 | Ethylene Chemiluminescence | 3 0.1 | 750 | 4 0.08 | 3 20,000 | |||||||||||
| O3 | NO-chemiluminescence | 3 0.1 | 0.5 | 750 | 4 0.08 | 3 20,000 | ||||||||||
| O3 | Electrochemical | 3 0.1 | 0.5 | 0.5 | 4 0.08 | 3 20,000 | ||||||||||
| O3 | Spectrophotometric-wet chemical (potassium iodide) | 3 0.1 | 0.5 | 0.5 | 3 0.5 | 4 0.08 | ||||||||||
| O3 | Spectrophotometric-gas phase, including ultraviolet absorption and DOAS | 0.5 | 0.5 | 3 0.5 | 4 0.08 | 0.02 | 20,000 | |||||||||
| CO | Non-dispersive Infrared | 750 | 20,000 | 4 10 | ||||||||||||
| CO | Gas chromatography with flame ionization detector | 20,000 | 4 10 | 0.5 | ||||||||||||
| CO | Electrochemical | 0.5 | 0.2 | 20,000 | 4 10 | |||||||||||
| CO | Catalytic combustion-thermal detection | 0.1 | 750 | 0.2 | 20,000 | 4 10 | 5.0 | 0.5 | ||||||||
| CO | IR fluorescence | 750 | 20,000 | 4 10 | 0.5 | |||||||||||
| CO | Mercury replacement-UV photometric | 0.2 | 4 10 | 0.5 | ||||||||||||
| NO2 | Chemiluminescent | 3 0.1 | 0.5 | 4 0.1 | 0.5 | 20,000 | ||||||||||
| NO2 | Spectrophotometric-wet chemical (azo-dye reaction) | 0.5 | 4 0.1 | 0.5 | 750 | 0.5 | ||||||||||
| NO2 | Electrochemical | 0.2 | 3 0.1 | 0.5 | 4 0.1 | 0.5 | 750 | 0.5 | 20,000 | 50 | ||||||
| NO2 | Spectrophotometric-gas phase | 3 0.1 | 0.5 | 4 0.1 | 0.5 | 0.5 | 20,000 | 50 | ||||||||
| 1 Concentrations of interferent listed must be prepared and controlled to ±10 percent of the stated value. | ||||||||||||||||
| 2 Analyzer types not listed will be considered by the Administrator as special cases. | ||||||||||||||||
| 3 Do not mix interferent with the pollutant. | ||||||||||||||||
| 4 Concentration of pollutant used for test. These pollutant concentrations must be prepared to ±10 percent of the stated value. | ||||||||||||||||
| 5 If candidate method utilizes an elevated-temperature scrubber for removal of aromatic hydrocarbons, perform this interference test. | ||||||||||||||||
| 6 If naphthalene test concentration cannot be accurately quantified, remove the scrubber, use a test concentration that causes a full-scale response, reattach the scrubber, and evaluate response for interference. |
[89 FR 16383, Mar. 6, 2024]