- Table B-3 to Subpart B of Part 53—Interferent Test Concentration,1 Parts per Million
| Pollutant | Analyzer type | Hydro-chloric acid | Ammonia | Hydrogen
sulfide | Sulfur dioxide | Nitrogen dioxide | Nitric oxide | Carbon dioxide | Ethylene | Ozone | Mxy-
lene | Water vapor | Carbon monoxide | Methane | Ethane | Naphthalene | SO | Ultraviolet fluorescence | 5 0.1 | 4 0.14 | 0.5 | 0.5 | 0.5 | 0.2 | 20,000 | 6 0.05 | SO | Flame photometric | 0.01 | 4 0.14 | 750 | 3 20,000 | 50 | SO | Gas chromatography | 0.1 | 4 0.14 | 750 | 3 20,000 | 50 | SO | Spectrophotometric-wet chemical (pararosanaline) | 0.2 | 0.1 | 0.1 | 4 0.14 | 0.5 | 750 | 0.5 | SO | Electrochemical | 0.2 | 0.1 | 0.1 | 4 0.14 | 0.5 | 0.5 | 0.2 | 0.5 | 3 20,000 | SO | Conductivity | 0.2 | 0.1 | 4 0.14 | 0.5 | 750 | SO | Spectrophotometric-gas phase, including DOAS | 4 0.14 | 0.5 | 0.5 | 0.2 | O | Chemiluminescent | 3 0.1 | 750 | 4 0.08 | 3 20,000 | O | Electrochemical | 3 0.1 | 0.5 | 0.5 | 4 0.08 | O | Spectrophotometric-wet chemical (potassium iodide) | 3 0.1 | 0.5 | 0.5 | 3 0.5 | 4 0.08 | O | Spectrophotometric-gas phase, including ultraviolet absorption and DOAS) | 0.5 | 0.5 | 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 | NO | Chemiluminescent | 3 0.1 | 0.5 | 4 0.1 | 0.5 | 20,000 | NO | Spectrophotometric-wet chemical (azo-dye reaction) | 0.5 | 4 0.1 | 0.5 | 750 | 0.5 | NO | Electrochemical | 0.2 | 3 0.1 | 0.5 | 4 0.1 | 0.5 | 750 | 0.5 | 20,000 | 50 | NO | Spectrophotometric-gas phase | 3 0.1 | 0.5 | 4 0.1 | 0.5 | 0.5 | 20,000 | 50 |
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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 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.