ASTM D5762-24 PDF

Full title and description

ASTM D5762-24 — Standard Test Method for Nitrogen in Liquid Hydrocarbons, Petroleum and Petroleum Products by Boat‑Inlet Chemiluminescence. This method defines a boat‑inlet oxidative combustion and chemiluminescence detection procedure for determining total nitrogen in liquid hydrocarbons, petroleum process streams and lubricating oils across a mid‑to‑high concentration range.

Abstract

ASTM D5762-24 specifies ignition/combustion of a weighed or measured liquid sample introduced via a boat inlet into a high‑temperature furnace, conversion of nitrogen compounds to nitric oxide (NO), and quantitative measurement by chemiluminescence (NO + O3 → excited NO2* → light emission). The method is intended for quality control and research applications where nitrogen concentrations typically fall between about 40 μg/g and 10 000 μg/g; for very low concentrations other syringe/inlet methods (for example D4629) may be preferable.

General information

• Status: Active (D5762-24, active as published and tracked by ASTM; last updated on the ASTM store listing Aug 2, 2024).
• Publication date: July 1, 2024 (designated D5762-24). ASTM also shows a last‑updated tracker entry on Aug 2, 2024.
• Publisher: ASTM International (American Society for Testing and Materials).
• ICS / categories: ICS 75.080 (Petroleum products in general); Book of Standards volume 05.02; developed by Subcommittee D02.03.
• Edition / version: D5762-24 (current 2024 edition; supersedes earlier editions such as D5762-18A).
• Number of pages: 6 pages (technical standard text).

Scope

This test method covers determination of total nitrogen in liquid hydrocarbons, petroleum process streams and lubricating oils in the approximate concentration range 40 μg/g to 10 000 μg/g (equivalently 40–10 000 mg/kg). It applies to matrices suitable for boat‑inlet combustion and where chemiluminescence detection provides the required sensitivity and linear range; for very light hydrocarbons with nitrogen below about 100 μg/g, Test Method D4629 is identified as an alternative. The standard specifies units (SI), safety considerations and calibration/reporting requirements.

Key topics and requirements

• Analytical principle: boat‑inlet oxidative combustion with chemiluminescence detection of NO/NO2 species.
• Applicable range and detection limits: nominal working range ~40 μg/g to 10 000 μg/g total nitrogen.
• Apparatus: boat inlet/sample boat, high‑temperature furnace(s), oxidizing gas flow, chemiluminescence detector, autosampler options for liquids.
• Calibration and standards: use of certified nitrogen calibration standards and appropriate blank/standard runs to establish linearity and response factors.
• Sample preparation: instructions for viscous or high‑boiling samples, recommended sample sizes, and avoidance of contamination; alternative prep practices referenced for difficult matrices.
• Quality control and reporting: replicate analyses, precision checks, reporting units, and required statements about method limits and uncertainties.
• Safety and environmental notes: handling of oxidizing gases, high temperatures, and combustion by‑products; follow lab safety protocols specified in the standard.

Typical use and users

Used by refinery laboratories, lubricant manufacturers, process control QC labs, analytical instrument vendors, and research groups monitoring hydrotreating performance or additive nitrogen content. Typical applications include catalyst feed and product monitoring, quality acceptance of lubricants and process streams, and R&D on nitrogen removal and formulation. Laboratories employ dedicated nitrogen analyzers configured for boat‑inlet operation or combined TN/TS instruments that comply with the method.

Related standards

Standards commonly referenced alongside D5762 include ASTM D4629 (trace nitrogen by syringe/inlet oxidative combustion and chemiluminescence), D7455 (sample preparation of petroleum and lubricant products for elemental analysis), and other petroleum elemental analysis methods (TN/TS practices and XRF sulfur methods). D5762 is part of the petroleum analysis suite in Book of Standards volume 05.02.

Keywords

boat inlet; chemiluminescence; total nitrogen; petroleum products; lubricating oil; elemental analysis; TN; combustion; calibration; ASTM D5762-24.

FAQ

Q: What is this standard?

A: ASTM D5762-24 is the 2024 edition of the standardized test method describing boat‑inlet oxidative combustion plus chemiluminescence detection for measuring total nitrogen in liquid hydrocarbons and petroleum products.

Q: What does it cover?

A: It covers scope, apparatus, sample handling, calibration, test procedure, quality control and reporting for nitrogen determinations in the nominal range ~40 μg/g to 10 000 μg/g; it also points to alternative methods (for lower concentrations) and contains safety notes.

Q: Who typically uses it?

A: Refinery QC labs, lubricant manufacturers, contract testing laboratories, instrument vendors and research laboratories involved in monitoring nitrogen in feeds/products or characterizing additive packages.

Q: Is it current or superseded?

A: Current — designated D5762-24 (the active 2024 edition) per ASTM’s standards listing; earlier editions (for example D5762-18A) have been superseded by the 2024 version. ASTM’s store page shows the document as active with an update tracker entry in August 2024.

Q: Is it part of a series?

A: Yes — it is one of several ASTM petroleum and lubricant elemental analysis standards maintained by Committee D02 (Book of Standards volume 05.02) and is frequently cross‑referenced with other TN/TS methods and sample preparation practices.

Q: What are the key keywords?

A: Boat‑inlet, chemiluminescence, total nitrogen, petroleum, lubricants, TN, combustion, calibration, D5762-24.