40 CFR § 1065.267 - Gas chromatograph with a flame ionization detector.

---
identifier: "/us/cfr/t40/s1065.267"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 1065.267 - Gas chromatograph with a flame ionization detector."
title_number: 40
title_name: "Protection of Environment"
section_number: "1065.267"
section_name: "Gas chromatograph with a flame ionization detector."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "U"
subchapter_name: "AIR POLLUTION CONTROLS"
part_number: "1065"
part_name: "ENGINE-TESTING PROCEDURES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401-7671q."
regulatory_source: "70 FR 40516, July 13, 2005, unless otherwise noted."
cfr_part: "1065"
---


# 1065.267 Gas chromatograph with a flame ionization detector.

(a) *Application.* You may use a gas chromatograph with a flame ionization detector (GC-FID) to measure CH<sub>4</sub> and C<sub>2</sub>H<sub>6</sub> concentrations of diluted exhaust for batch sampling. While you may also use a nonmethane cutter to measure CH<sub>4</sub>, as described in § 1065.265, use a reference procedure based on a gas chromatograph for comparison with any proposed alternate measurement procedure under § 1065.10.

(b) *Component requirements.* We recommend that you use a GC-FID that meets the specifications in § 1065.205 and that the measurement be done according to SAE J1151 (incorporated by reference, see § 1065.1010). The GC-FID must meet the linearity verification in § 1065.307.

[76 FR 57442, Sept. 15, 2011, as amended at 79 FR 23761, Apr. 28, 2014; 81 FR 74163, Oct. 25, 2016; 89 FR 29796, Apr. 22, 2024]