43 CFR § 3175.119 - Components to analyze.

---
identifier: "/us/cfr/t43/s3175.119"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "43 CFR § 3175.119 - Components to analyze."
title_number: 43
title_name: "Public Lands: Interior"
section_number: "3175.119"
section_name: "Components to analyze."
chapter_name: "BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR"
subchapter_number: "C"
subchapter_name: "MINERALS MANAGEMENT (3000)"
part_number: "3170"
part_name: "ONSHORE OIL AND GAS PRODUCTION"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "25 U.S.C. 396d and 2107; 30 U.S.C. 189, 306, 359, and 1751; and 43 U.S.C. 1732(b), 1733, and 1740."
regulatory_source: "81 FR 81421, Nov. 17, 2016, unless otherwise noted."
cfr_part: "3170"
---


# 3175.119 Components to analyze.

(a) The gas must be analyzed for the following components:

(1) Methane;

(2) Ethane;

(3) Propane;

(4) Iso Butane;

(5) Normal Butane;

(6) Pentanes;

(7) Hexanes + (C<sub>6</sub>+);

(8) Carbon dioxide; and

(9) Nitrogen.

(b) When the concentration of C<sub>6</sub>+ exceeds 0.5 mole percent, the following gas components must also be analyzed:

(1) Hexanes;

(2) Heptanes;

(3) Octanes; and

(4) Nonanes +.

(c) In lieu of testing each sample for the components required under paragraph (b) of this section, the operator may periodically test for these components and adjust the assumed C<sub>6</sub>+ composition to remove bias in the heating value (see § 3175.126(a)(3)). The C<sub>6</sub>+ composition must be applied to the mole percent of C<sub>6</sub>+ analyses until the next analysis is done under paragraph (b) of this section. The minimum analysis frequency for the components listed in paragraph (b) of this section is as follows:

(1) For high-volume FMPs, once per year; and

(2) For very-high-volume FMPs, once every 6 months.