{"data":{"id":"us/40-cfr-1065.267","jurisdiction":"us","citation":"40 CFR 1065.267","heading":"Gas chromatograph with a flame ionization detector.","body":"(a) Application. You may use a gas chromatograph with a flame ionization detector (GC-FID) to measure CH4 and C2H6 concentrations of diluted exhaust for batch sampling. While you may also use a nonmethane cutter to measure CH4, 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.\n(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.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER U—AIR POLLUTION CONTROLS","PART 1065—ENGINE-TESTING PROCEDURES","Subpart C—Measurement Instruments"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"f206dfaa184b3c64d501af1eb23bca6aa07d15705f563a79caa2d5375c423699","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1065.266","next":"us/40-cfr-1065.269"},"notice":"GroundRules: Original legal text. Not legal advice."}