ISO 3987:2010 PDF

Petroleum products — Determination of sulfated ash in lubricating oils and additives

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Title (English):

ISO 3987:2010

Petroleum products — Determination of sulfated ash in lubricating oils and additives

Document status:: Withdrawn
Format:: Electronic (PDF)
Number of pages:: 10
Publication date:: October 29, 2010
Edition:: ISO IS 3987 edition 3 version 1
ICS:: 75.100

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Description (English):

ISO 3987:2010 describes a procedure for the determination of the mass percentage of sulfated ash from unused lubricating oils containing additives and from additive concentrates used in compounding. These additives usually contain one or more of the following metals: barium, calcium, magnesium, zinc, potassium, sodium and tin. The elements sulfur, phosphorus and chlorine can also be present in combined form.

Technical details

Technical committee: ISO/TC 28 - Petroleum and related products, fuels and lubricants from natural or synthetic sources
SKU: ISO 3987:2010

Abstract

ISO 3987:2010 - Petroleum products: Determination of sulfated ash in lubricating oils and additives

Overview

ISO 3987:2010 specifies an analytical procedure for determining sulfated ash (mass percentage) in unused lubricating oils and additive concentrates. The method targets metal-containing additives (barium, calcium, magnesium, zinc, potassium, sodium, tin) and accounts for combined elements such as sulfur, phosphorus and chlorine. The procedure has a lower applicability limit of 0.005 % (m/m) and special considerations for results below 0.02 % (m/m).

Key topics and technical requirements

Principle: Ignite and carbonize the oil sample, treat the residue with sulfuric acid, then heat at 775 °C ± 25 °C in a muffle furnace until oxidation of carbon is complete; repeat acid treatment and ignition to constant mass.
Calculation: Sulfated ash (%) = (mass of sulfated ash / mass of test portion) × 100.
Limits & applicability:
- Lower limit: 0.005 % (m/m) sulfated ash.
- Application below 0.02 % (m/m) restricted to oils with ashless additives.
- Not intended for used engine oils containing lead; non-additive oils are better served by ISO 6245.
Reagents & solvents: high-purity sulfuric acid (concentrated and 1+1 dilution), isopropanol (propan-2-ol), toluene, and low-ash mineral (white) oil for dilution or blanks.
Apparatus: porcelain/fused silica/platinum crucibles (special size guidance for low-ash samples), electric muffle furnace, balance with 0.1 mg resolution, ashless filter paper.
Quality control: sulfuric acid blank for very low ash levels; repeat weighings until two successive masses differ by ≤ 1.0 mg.
Precision: repeatability and reproducibility statistics are provided; reporting precision varies by ash level (e.g., results reported to 0.001 % for

Related standards

Mentioned in the description and other ISO standards

ISO 3987:2010 - Petroleum products: Determination of sulfated ash in lubricating oils and additives

Overview

Key topics and technical requirements

Principle: Ignite and carbonize the oil sample, treat the residue with sulfuric acid, then heat at 775 °C ± 25 °C in a muffle furnace until oxidation of carbon is complete; repeat acid treatment and ignition to constant mass.
Calculation: Sulfated ash (%) = (mass of sulfated ash / mass of test portion) × 100.
Limits & applicability:
- Lower limit: 0.005 % (m/m) sulfated ash.
- Application below 0.02 % (m/m) restricted to oils with ashless additives.
- Not intended for used engine oils containing lead; non-additive oils are better served by ISO 6245.
Reagents & solvents: high-purity sulfuric acid (concentrated and 1+1 dilution), isopropanol (propan-2-ol), toluene, and low-ash mineral (white) oil for dilution or blanks.
Apparatus: porcelain/fused silica/platinum crucibles (special size guidance for low-ash samples), electric muffle furnace, balance with 0.1 mg resolution, ashless filter paper.
Quality control: sulfuric acid blank for very low ash levels; repeat weighings until two successive masses differ by ≤ 1.0 mg.
Precision: repeatability and reproducibility statistics are provided; reporting precision varies by ash level (e.g., results reported to 0.001 % for

ISO 3987:2010 PDF

Technical details

Abstract

ISO 3987:2010 - Petroleum products: Determination of sulfated ash in lubricating oils and additives

Overview

Key topics and technical requirements

Related standards

Abstract

ISO 3987:2010 - Petroleum products: Determination of sulfated ash in lubricating oils and additives

Overview

Key topics and technical requirements

Related standards

Petroleum products - Determination of ash (ISO 6245:2001)

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