GOST 11362-96 PDF

Full title and description

GOST 11362-96 — Petroleum products and lubricants. Neutralization number. Potentiometric titration method. This interstate (GOST) standard specifies a potentiometric titration procedure for determination of neutralization (acidic or basic) number in petroleum products and lubricants; it aligns with ISO 6619-88.

Abstract

GOST 11362-96 defines reagents, apparatus (including electrode and potentiometric systems), sample preparation, titration procedure (manual and automated), calibration, result calculation and reporting, as well as precision (repeatability and reproducibility) requirements for determination of neutralization (acid/alkaline) numbers in oils and lubricants by potentiometric titration. The standard was developed by MTK 31 and VNIINP and adopted as an interstate standard.

General information

• Status: Active (in-force) interstate standard (GOST).
• Publication date: Designation year 1996; date of introduction into force: 1 July 1997.
• Publisher: Adopted and entered into force via the Interstate Council (Межгосударственный совет) and submitted by Gosstandart of Russia (now part of Rosstandart / EASC publishing practice).
• ICS / categories: ICS 75.080 (Petroleum products and lubricants). Group B19.
• Edition / version: GOST 11362-96 (original 1996 edition; implemented 1997-07-01).
• Number of pages: 17 pages (typical published sheet count for the standard text).

Scope

The standard applies to petroleum products and lubricants and specifies a potentiometric titration method for determining the neutralization number (acid number or total base/alkaline number where appropriate). It covers both manual and automated potentiometric titration procedures, required reagents and apparatus, electrode system preparation, calibration (grading), sample handling, calculation of results and format of test reports. It is intended for routine quality control, laboratory testing and regulatory verification of oils and lubricants.

Key topics and requirements

• Principle: potentiometric titration of a prepared sample using alcoholic KOH (for acidity/alkalinity) or alcoholic HCl where specified, with monitoring of electrode potential to detect equivalence points.
• Reagents and solutions: specifications for titrants, solvents and buffer solutions used for electrode calibration and end-point determination.
• Apparatus: requirements for electrodes (glass reference/indicator electrodes, calomel or silver chloride reference options), potentiometer/voltmeter sensitivity, burettes and stirring equipment; design details for manual and automated titration setups.
• Sample preparation and handling: weighed aliquots, dissolution procedures and temperature control to ensure representative and repeatable titration.
• Calibration and grading: procedures for calibrating the potentiometric system and titrant concentration verification (including use of certified reference materials where applicable).
• Accuracy and precision: specified repeatability (convergence) and reproducibility limits for acid and alkaline numbers across defined concentration ranges; tables in the standard give numerical limits for different result ranges.
• Reporting and test protocol: required contents of test reports (product ID, reference to the standard, result, deviations, date and operator details).

Typical use and users

Primary users are chemical and physical testing laboratories, lubricant and petroleum product manufacturers, quality control departments, certification and conformity assessment bodies, research institutes (including VNIINP) and regulatory laboratories that perform routine and type testing of oils and lubricants to determine acid/alkaline content and neutralization number for quality and shelf‑life assessment. The method is used both for new products and for used/aged oils in service analysis.

Related standards

GOST 11362-96 is aligned with ISO 6619-88 and is commonly referenced alongside other GOST/ISO methods used in lubricant analysis (examples of related or cited standards include national GOST methods for sample handling, titration practice and specific property tests). Laboratories often use GOST 11362-96 together with other national test methods for complementary determinations.

Keywords

neutralization number; acid number; alkaline number; potentiometric titration; petroleum products; lubricants; titrator; electrode; ISO 6619-88; VNIINP; quality control.

FAQ

Q: What is this standard?

A: It is GOST 11362-96, an interstate standard that defines a potentiometric titration method to determine the neutralization (acid/alkaline) number of petroleum products and lubricants (aligned with ISO 6619-88).

Q: What does it cover?

A: It covers reagents and solutions, apparatus and electrode systems, sample preparation, calibration, manual and automated titration procedures, calculation of results, precision/accuracy requirements and the format of test reports.

Q: Who typically uses it?

A: Analytical and QC laboratories, lubricant and petroleum manufacturers, conformity assessment bodies, research institutes and regulatory labs performing routine and service-life analyses of oils and lubricants.

Q: Is it current or superseded?

A: As published, GOST 11362-96 is the 1996 edition introduced on 1 July 1997 and is treated as the operative GOST method in reference databases and standards catalogs; users should check national/regional registries for any later amendments or replacement texts before formal compliance activities.

Q: Is it part of a series?

A: The standard belongs to the family of petroleum‑product and lubricant test methods (ICS 75.080) and is cross‑referenced with other GOST/ISO methods used for lubricant characterization and related titrimetric determinations. It explicitly references ISO 6619-88.

Q: What are the key keywords?

A: Neutralization number, acid number, alkaline number, potentiometric titration, electrodes, titrant, petroleum products, lubricants, ISO 6619.