40 C.F.R. § B app Table B-3 to Subpart B of Part 53

Current through October 31, 2024
Appendix 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
SO 2Ultraviolet fluorescence5 0.14 0.140.50.50.50.220,0006 0.05
SO 2Flame photometric0.014 0.147503 20,00050
SO 2Gas chromatography0.14 0.147503 20,00050
SO 2Spectrophotometric-wet chemical (pararosanaline)0.20.10.14 0.140.57500.5
SO 2Electrochemical0.20.10.14 0.140.50.50.20.53 20,000
SO 2Conductivity0.20.14 0.140.5750
SO 2Spectrophotometric-gas phase, including DOAS4 0.140.50.50.50.2
O 3Ethylene Chemiluminescence3 0.17504 0.083 20,000
O 3NO-chemiluminescence3 0.10.57504 0.083 20,000
O 3Electrochemical3 0.10.50.54 0.083 20,000
O 3Spectrophotometric-wet chemical (potassium iodide)3 0.10.50.53 0.54 0.08
O 3Spectrophotometric-gas phase, including ultraviolet absorption and DOAS0.50.53 0.54 0.080.0220,000
CONon-dispersive Infrared75020,0004 10
COGas chromatography with flame ionization detector20,0004 100.5
COElectrochemical0.50.220,0004 10
COCatalytic combustion-thermal detection0.17500.220,0004 105.00.5
COIR fluorescence75020,0004 100.5
COMercury replacement-UV photometric0.24 100.5
NO 2Chemiluminescent3 0.10.54 0.10.520,000
NO 2Spectrophotometric-wet chemical (azo-dye reaction)0.54 0.10.57500.5
NO 2Electrochemical0.23 0.10.54 0.10.57500.520,00050
NO 2 Spectrophotometric-gas phase3 0.10.54 0.10.50.5 20,00050

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.

40 C.F.R. B app Table B-3 to Subpart B of Part 53

89 FR 16383 , 5/6/2024