§1065.375. Interference verification for N 2 O analyzers. — Inbound Citations

(2) Perform interference verification for laser infrared analyzers using the procedures of § 1065.375. Use good engineering judgment to determine interference species for laser infrared analyzers. Note that interference species are dependent on the H2O infrared absorption band chosen by the instrument manufacturer. For each analyzer determine the H2O infrared absorption band. Determine interference species under this paragraph (d)(2) that are appropriate for each H2O infrared absorption band, or you may identify the interference species based on the instrument manufacturer's recommendations.

(c) Certain compounds can positively interfere with NDIR, FTIR, laser infrared analyzers, and photoacoustic analyzers by causing a response similar to N2O. Perform interference verification for NDIR, FTIR, laser infrared analyzers, and photoacoustic analyzers using the procedures of § 1065.375. Interference verification is not required for GC-ECD. Perform interference verification for the following interference species:

(1) The interference species for NDIR analyzers are CO, CO2, H2O, CH4, and SO2. Note that interference species, with the exception of H2O, are dependent on the N2O infrared absorption band chosen by the instrument manufacturer. For each analyzer determine the N2O infrared absorption band. For each N2O infrared absorption band, use good engineering judgment to determine which interference species to evaluate for interference verification.

(2) Note that interference species, with the exception of H2O, are dependent on the N2O infrared absorption band chosen by the instrument manufacturer. For each analyzer determine the N2O infrared absorption band. Determine interference species under this paragraph (c)(2) that are appropriate for each N2O infrared absorption band, or you may identify the interference species based on the instrument manufacturer's recommendations.

(f) The provisions of § 1066.150 apply instead 40 CFR 1065.350(c), 1065.355(c), 1065.370(c), and 1065.375(c).

(d) Perform the interference verification for an FTIR analyzer using the same procedure that applies for N2O analyzers in § 1065.375(d).

(d) Perform the interference verification by following the procedure in § 1065.375(d), comparing the results to paragraph (c) of this section.