ASTM D1949-79 (1984)e1 PDF

Full title and description

Designation: ASTM D1949-79(1984)e1 — Test Method for Separation of Tetraethyllead and Tetramethyllead in Gasoline. The standard describes a laboratory procedure used historically to separate and prepare samples containing tetraethyllead (TEL) and tetramethyllead (TML) for subsequent analysis.

Abstract

This short test method provides a procedural separation for organolead additives in gasoline, allowing the two common trialkyllead compounds (tetraethyllead and tetramethyllead) to be isolated from the hydrocarbon matrix so that their concentrations can be determined by follow-on analytical techniques. The method is a historical oil‑industry procedure that predates and complements modern instrumental determinations.

General information

• Status: Withdrawn (historical; listed as withdrawn in archival catalogs).
• Publication date: 01 January 1984 (designation indicates original 1979 method with 1984 editorial/amendment marking).
• Publisher: ASTM International (American Society for Testing and Materials).
• ICS / categories: Liquid fuels and related products — ICS code historically associated with gasoline test methods (e.g., 75.160.20).
• Edition / version: D1949-79 (1984)e1 — editorial/amendment marking applied to the 1979 designation.
• Number of pages: Approximately 3 pages (short procedural method).

Scope

The standard covers a laboratory separation procedure intended to partition tetraethyllead and tetramethyllead from gasoline matrices to permit independent quantification. It is focused on sample preparation and separation rather than on the final instrumental measurement (e.g., atomic absorption or mass spectrometry), and was used when leaded gasoline additives were in common commercial use. The document is an historical method and has been withdrawn from active ASTM use.

Key topics and requirements

• Principles of liquid–liquid or chromatographic separation appropriate for trialkyllead species in hydrocarbon matrices.
• Recommended reagents and solvents for selective extraction of TEL and TML.
• Apparatus and glassware typically required for the separation procedure.
• Sample handling, sample size and preparation steps to minimise loss or cross‑contamination.
• Notes on safety and handling of organolead compounds (toxicity and waste disposal).
• References to follow‑up analytical techniques for quantification (instrumental analysis performed after separation).

Typical use and users

Historically used by petroleum testing laboratories, refinery analytical groups, additive manufacturers, and research labs studying fuel additives. Today the method is of archival interest for historical data interpretation, forensic reference, and specialized laboratories that must evaluate legacy samples or compare historical test results with modern analyses.

Related standards

Related documents include other ASTM test methods and analytical standards for gasoline, fuel additives, and lead determination (historical lead‑in‑fuel methods and modern instrumental standards for lead analysis). Users seeking current lead‑in‑fuel procedures should consult active ASTM methods and modern instrumental standards for trace metal analysis.

Keywords

tetraethyllead, tetramethyllead, gasoline, separation, sample preparation, organolead, lead additives, ASTM D1949, historical test method

FAQ

Q: What is this standard?

A: ASTM D1949-79(1984)e1 is a short ASTM test method that described a laboratory separation procedure for tetraethyllead (TEL) and tetramethyllead (TML) in gasoline.

Q: What does it cover?

A: It covers the sample‑preparation/separation steps used to isolate the two common trialkyllead additives from gasoline so they can be measured by subsequent analytical techniques; it does not define the final instrumental measurement method itself.

Q: Who typically uses it?

A: Historically, petroleum and refinery analytical labs, additive manufacturers, and research groups working with leaded gasoline samples. Today it is mainly of archival or forensic interest.

Q: Is it current or superseded?

A: The method is withdrawn (listed as withdrawn in archival catalogs and standards indices). Users should rely on current, active ASTM methods and modern instrumental procedures for routine lead analysis.

Q: Is it part of a series?

A: It belonged to the body of ASTM petroleum and liquid fuels test methods (D‑02 committee area) and was one of many numbered D‑series methods for fuel and additive testing; it is a standalone test method designation within that series.

Q: What are the key keywords?

A: Tetraethyllead, tetramethyllead, gasoline, organolead, separation, sample preparation, ASTM D1949.