GOST 1461-75 PDF

Full title and description

GOST 1461-75 — "Petroleum and petroleum products. Method of ash test" (Russian: "Нефть и нефтепродукты. Метод определения зольности"). The standard specifies a laboratory procedure for determining the ash content of crude oil and petroleum products by controlled combustion/ignition of a weighed sample and subsequent calcination to constant mass of the inorganic residue (ash).

Abstract

GOST 1461-75 defines a gravimetric method for measuring the mass fraction of ash in petroleum and petroleum products. It covers sample preparation (including use of pre-ashed filter paper where applicable), controlled burning/ignition, use of suitable crucibles (platinum, quartz-glass or porcelain), final calcination to constant mass, calculation of ash content as a percentage of the original sample mass, and reporting/precision requirements. Certain product types (for example petroleum coke, bitumens, some waste oils and lubricants containing graphite, MoS2, metallic dust or elemental sulfur) are excluded from the method.

General information

• Status: Superseded / withdrawn in many catalogs — replaced by a later revision (see replacement standard).
• Publication date: Approved June 25, 1975 (designation "-75"); entered into force/publication in official collections in 1975–1976.
• Publisher: State Committee for Standards of the Council of Ministers of the USSR (Gosstandart).
• ICS / categories: ICS 75.080 — Petroleum products in general; test methods for oil and petroleum products.
• Edition / version: Original 1975 edition (GOST 1461-75), later amended by subsequent amendments; ultimately superseded by a revised standard issued in 2023.
• Number of pages: Approximately 5 pages (concise test method).

Scope

The standard applies to the determination of total ash (inorganic residue remaining after combustion) in crude oil and petroleum products by a destructive gravimetric technique. It is intended for quality control and specification testing of petroleum streams where ash is a relevant parameter. Exclusions typically include petroleum coke, bitumens, some spent/waste oils, and products or additives containing components (e.g., graphite, molybdenum disulfide, elemental sulfur or metallic dust) that interfere with the method.

Key topics and requirements

• Principle: weigh a representative aliquot, burn/ignite the organic matrix, and calcine the residue to constant mass; determine ash as percentage of initial sample mass.
• Sample preparation: rules for taking representative samples, removal of free water if required, and use of pre-ashed filter paper when appropriate.
• Apparatus and materials: crucibles/tags (platinum, quartz-glass or porcelain), muffle furnace capable of required temperatures, electric hotplate or sand bath, thermometers and analytical balances with appropriate resolution.
• Operating temperatures: staged ignition and calcination temperatures (typical values used depend on product type — e.g., around 550 °C or higher where specified) and requirements for air access during ashing.
• Use of pre-ashed filter paper to collect and transfer residues for low-ash products; procedures when sample evaporation is permitted by the product specification.
• Procedure controls: drying/dehydration steps for water-containing samples, controlled ignition, repeated calcination, cooling in desiccator and weighing to constant mass (repeat until mass change below specified tolerance).
• Calculation and reporting: formula for ash content X (%) = (mass of ash — mass of ash attributable to filters) / mass of sample × 100; rules for number of parallel determinations and significant-figure reporting (precision to 0.001% for very low ash levels and to 0.01% for higher ash levels in later revisions).
• Precision and reproducibility: specified repeatability and reproducibility limits (tables giving allowable differences depending on ash level) to judge acceptability of results.
• Limitations and interferences: list of products and components that invalidate or interfere with the method and guidance to use alternative tests where necessary.

Typical use and users

GOST 1461-75 is (or was) used by petrochemical and refinery quality-control laboratories, commercial testing laboratories, product specification authors and regulatory bodies concerned with characterization of fuels, lubricants and other petroleum products. Typical users include laboratory analysts, QA/QC engineers in refineries, standards authors, and R&D personnel developing or verifying product formulations.

Related standards

Commonly referenced companion standards include methods and specifications for sampling and laboratory equipment used together with the ash-test method, for example standards on sampling of petroleum products, specifications for crucibles and glassware, reagent specifications (toluene, hydrochloric acid), and thermometers and balances used for petroleum testing. The method has historically been cited by multiple petroleum-product specification standards and later consolidated or updated in a modern replacement standard.

Keywords

ash; ash content; zольность; petroleum; crude oil; petroleum products; gravimetric method; ashing; muffle furnace; laboratory method; fuel testing; oil analysis; QC; GOST 1461

FAQ

Q: What is this standard?

A: GOST 1461-75 is a Soviet-era national standard that defines a gravimetric laboratory method for determining the ash content of crude oil and petroleum products by combustion and calcination of a weighed sample.

Q: What does it cover?

A: It covers sample preparation, apparatus and reagents, ignition and calcination procedures, weighing to constant mass, calculation of ash content, precision requirements and limitations/exclusions for certain product types or interfering substances.

Q: Who typically uses it?

A: Petrochemical/refinery QC laboratories, independent testing laboratories, standards bodies and engineers responsible for product specifications or quality control of fuels, lubricants and related petroleum products.

Q: Is it current or superseded?

A: The 1975 edition (GOST 1461-75) has been superseded by a modern revision of the method. A later consolidated revision of the ash-determination method for crude oil and petroleum products was issued in 2023; GOST 1461-75 is therefore treated as historical and replaced for current regulatory or normative use.

Q: Is it part of a series?

A: Yes. GOST 1461-75 is part of a family of GOST test methods for petroleum and petroleum products (sampling, physical and chemical tests). It follows earlier and later GOST method editions (for example an earlier GOST 1461-59) and is linked by cross-reference to related GOSTs covering sampling, reagents and laboratory apparatus.

Q: What are the key keywords?

A: Ash, ash content, zольность, petroleum, crude oil, petroleum products, ashing, gravimetric test, muffle furnace, laboratory method, QC, GOST 1461.