ASTM D7876-13 (2018) PDF

Full title and description

ASTM D7876-13(2018) — Standard Practice for Sample Decomposition Using Microwave Heating (With or Without Prior Ashing) for Atomic Spectroscopic Elemental Determination in Petroleum Products and Lubricants. This practice describes microwave-assisted sample decomposition procedures (closed- and open-vessel, with optional ashing) used to prepare petroleum, lubricant and related fossil-fuel samples for elemental analysis by atomic spectrometric techniques such as ICP-AES and AAS.

Abstract

This practice provides procedures for microwave heating to decompose or digest petroleum and lubricant samples prior to atomic spectrometric elemental determination. It highlights advantages of microwave digestion (rapid heating, higher achievable temperatures and pressures in closed vessels, reduced contamination), cautions about potential losses of volatile elements and chemical-species effects, and recommends verification using reference materials or spike-recovery checks. The practice is intended to support ICP-AES, AAS and other atomic spectrometric measurements when appropriate analytical performance criteria are met.

General information

• Status: Active (standard reapproved/confirmed in 2018; last updated Jun 1, 2018).
• Publication date: Original designation 2013 (D7876-13); reapproval/confirmation in 2018 (designation shown as D7876-13(2018)).
• Publisher: ASTM International.
• ICS / categories: 75.080 (Petroleum products in general); 75.100 (Lubricants, industrial oils and related products).
• Edition / version: D7876-13, reapproved/confirmed 2018 (often cited as D7876-13(2018) or D7876-13R18).
• Number of pages: Approximately 10 pages.

Scope

This practice covers microwave radiation procedures for sample decomposition prior to elemental determination by atomic spectroscopy. It is applicable to petroleum products and lubricants (greases, additives, lubricating oils, gasolines, diesels) and may also be applied to related fossil-fuel materials (coal, fly ash, coke, oil shale). Although based primarily on ICP-AES and AAS, the practice allows other atomic spectrometric techniques if required detection limits and performance criteria are achieved. The practice includes guidance on vessel types, reagent considerations, and safety warnings about potential losses of volatile elements during digestion.

Key topics and requirements

• Microwave-assisted sample decomposition (closed- and open-vessel approaches) for rapid digestion of carbonaceous and petroleum matrices.
• Intended for preparation prior to atomic spectrometric methods such as ICP-AES and AAS (other techniques permitted if performance criteria met).
• Guidance on handling volatile elements (As, B, Cr, Hg, Sb, Se, Sn) and chemical-species effects that can affect recovery and detection.
• Recommendations to use reference materials or spike-recovery tests to confirm analyte recovery.
• Safety and equipment considerations: vessel pressure/temperature limits, manufacturer instructions, and laboratory safety controls for digestion of organic and polymeric samples.
• Notes on applicability to other fossil-fuel materials and limits on sample size for certain matrices to avoid excessive pressure/exotherms.

Typical use and users

Analytical and commercial testing laboratories preparing petroleum products, lubricants, additives and related fossil-fuel samples for elemental analysis; quality control and R&D teams in oil and lubricant manufacturing; environmental and regulatory laboratories assessing elemental contaminants in fuels and oils; and standards committees and instrument vendors seeking harmonized sample-preparation guidance.

Related standards

Standards and practices commonly used alongside D7876 include ASTM Practice D7455 (Sample Preparation of Petroleum and Lubricant Products for Elemental Analysis), other ICP/AES method practices such as D7740 (optimization/calibration/validation of ICP-AES for petroleum products), and test methods addressing specific elements (for example, methods for mercury and other trace elements). Users should consult the referenced documents section of D7876 and current editions of related D02 subcommittee documents.

Keywords

microwave digestion; sample decomposition; petroleum products; lubricants; elemental analysis; ICP-AES; AAS; closed-vessel digestion; volatile elements; sample preparation; D7876.

FAQ

Q: What is this standard?

A: ASTM D7876 is a practice for microwave-assisted sample decomposition of petroleum and lubricant samples to prepare them for atomic spectrometric elemental analysis.

Q: What does it cover?

A: It covers procedures and precautions for using microwave heating (with or without prior ashing) to decompose samples, including applicability to various petroleum matrices, recommendations on vessel use and safety, and notes on analyte recovery and volatile-element losses.

Q: Who typically uses it?

A: Analytical laboratories, lubricant and fuel manufacturers, environmental and regulatory testing labs, and R&D groups that perform elemental analysis of oils, greases and related materials.

Q: Is it current or superseded?

A: The document is shown as D7876-13 with reapproval/confirmation in 2018 (listed as D7876-13(2018) or D7876-13R18) and is currently active per ASTM's document record as of the 2018 confirmation. Users should check ASTM records for any later revisions or reapprovals beyond 2018.

Q: Is it part of a series?

A: It is developed under ASTM Committee D02 (Subcommittee D02.03 on Elemental Analysis) and is part of a suite of D02 practices and test methods addressing sample preparation and atomic spectrometric analysis of petroleum and lubricant products (for example, Practice D7455 and ICP/AES-related practices).

Q: What are the key keywords?

A: Microwave digestion, sample decomposition, petroleum products, lubricants, elemental determination, ICP-AES, AAS, volatile elements, closed-vessel digestion, sample preparation.