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Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 53, Subpt. B, Tbl. B-3 Table B-3 to Subpart B of Part 53—Interferent Test Concentration, 1] Parts per Million

Current as of January 02, 2025 | Updated by Findlaw Staff

Pollutant

Analyzer type

Hydro-chloric acid

Ammonia

Hydrogen sulfide

Sulfur dioxide

Nitrogen dioxide

Nitric oxide

Carbon dioxide

Ethylene

Ozone

Mxylene

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

0.2

O3

Chemiluminescent

3 0.1

750

4 0.08

3 20,000

O3

Electrochemical

3 0.1

0.5

0.5

4 0.08

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

0.5

4 0.08

0.02

20,000

CO

Non-dispersive Infrared

750

20,000

410

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

2

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 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.

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Cite this article: FindLaw.com - Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 53, Subpt. B, Tbl. B-3 Table B-3 to Subpart B of Part 53—Interferent Test Concentration, 1] Parts per Million - last updated January 02, 2025 | https://codes.findlaw.com/cfr/title-40-protection-of-environment/cfr-pt-40-53-subpt-b-tbl-b-3/

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