Table B-3 to Subpart B of Part 53 - —Interferent Test Concentration, 1 Parts per Million

Table B-3 to Subpart B of Part 53—Interferent Test Concentration,¹ Parts per Million

Cross Reference

Link to an amendment published at 89 FR 16383, Mar. 6, 2024.

Table B-3 to Subpart B of Part 53—Interferent Test Concentration ¹

[Parts per million]

Pollutant	Analyzer type2	Hydro-chloric acid	Ammonia	Hydrogen sulfide	Sulfur dioxide	Nitrogen dioxide	Nitric oxide	Carbon dioxide	Ethylene	Ozone	MxyM-lene 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	Chemiluminescent	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]