GOST 9827-75 PDF

Full title and description

GOST 9827-75 — "Присадки и масла с присадками. Метод определения фосфора" (English: Additives and additive-containing oils — Method for determination of phosphorus). The standard specifies a photometric (colorimetric) analytical procedure for determining the mass fraction of phosphorus in additives and oils that contain additives.

Abstract

This GOST defines a laboratory method based on combustion of the test sample in an oxygen (calorimetric) bomb with subsequent formation of orthophosphoric acid and colorimetric (photometric) determination of phosphorus using vanadyl/ molybdate reagents. The procedure is intended for routine quality control and chemical analysis of lubricant additives and formulated oils at phosphorus levels from about 0.03 % and above.

General information

• Status: In force / active (standard marked as действующий and indicated as maintained/reprinted in later collections).
• Publication date: Approved 01 October 1975; introduced into force 01 January 1977 (designation suffix "-75" reflects the year of approval).
• Publisher: Approved by Gosstandart USSR; originally published by the Standards Publishing House (Издательство стандартов) and later reprinted in compilations of petroleum-product analysis methods.
• ICS / categories: Petroleum products and related industries — ICS 75.080 (oil products).
• Edition / version: Original designation ГОСТ 9827-75 (1975); entered into force 1977; contains amendments published in 1981, 1984, 1986 and 1989; later reprints/collections preserve the standard text.
• Number of pages: Typically published as a short method (commonly listed as 6 pages in standard catalogues and e‑libraries).

Scope

The standard applies to additive substances and oils containing additives, and establishes a photometric (colorimetric) method for determination of the mass fraction of phosphorus (practical lower limit about 0.03 %). It is intended for use in quality control and laboratory analysis of lubricant additives and formulated oils where phosphorus-bearing additives (e.g., antiwear and antioxidant components) are present.

Key topics and requirements

• Analytical principle: complete combustion of sample in an oxygen (calorimetric) bomb to convert phosphorus to orthophosphoric acid, followed by color-forming reaction and photometric measurement.
• Reagents and color system: use of vanadyl (ammonium metavanadate) and ammonium molybdate reagents to develop the measurable color for photometric determination.
• Measurement range: method established for mass fractions of phosphorus from ≈0.03 % upward (suitable for typical lubricant-additive concentrations).
• Apparatus: calorimetric/oxygen bomb, photometer or spectrophotometer with appropriate filters or wavelength (method gives instrument and cell requirements).
• Accuracy and repeatability: the standard includes requirements and limits for repeatability and reproducibility (specified convergence limits for results obtained by the same operator and between laboratories).
• Calculation and reporting: formulae and procedures for converting photometric readings to mass fraction of phosphorus and for reporting average results of replicate determinations.

Typical use and users

Used by industrial and commercial chemical and analytical laboratories in the petroleum, lubricant and additive manufacturing industries for quality control, regulatory compliance and formulation verification. Typical users include QC chemists, metrology/analytical labs, R&D groups in lubricant production, and certification/testing centers that analyze phosphorus-containing lubricant additives.

Related standards

GOST 9827-75 replaces the earlier GOST 9827-61. It is related to other petroleum-product analytical methods and normative documents referenced in its bibliography (examples include standards on reagents, sample preparation, and instrumentation used in oil-product analysis). The standard has received several amendments and has been included in later compilations of analytical methods for petroleum products.

Keywords

additives; additive-containing oils; phosphorus determination; photometric method; colorimetry; oxygen bomb combustion; orthophosphoric acid; vanadyl; ammonium molybdate; lubricant analysis; GOST 9827-75.

FAQ

Q: What is this standard?

A: GOST 9827-75 is a Soviet / interstate standard that specifies a laboratory photometric method for determining the mass fraction of phosphorus in additives and oils that contain additives.

Q: What does it cover?

A: It covers sample preparation (combustion in an oxygen bomb), reagents and apparatus, the color-forming photometric procedure (vanadyl and molybdate reagents), calculation of results, and accuracy/repeatability requirements for phosphorus determinations typically from 0.03 % and higher.

Q: Who typically uses it?

A: Analytical and QC laboratories in lubricant and additive manufacturing, petrochemical testing labs, R&D groups formulating oils, and certification bodies that perform compositional analysis of lubricant additives.

Q: Is it current or superseded?

A: The standard is commonly listed as active (in force) in Russian standard catalogues and databases; it has been maintained with published amendments and reprints. For regulatory or contractual use verify the current status with the national standards body or an official standards database because adoption or replacement can vary by jurisdiction and over time.

Q: Is it part of a series?

A: Yes — it belongs to the family of standards and analytical methods for petroleum products and lubricants (ICS class 75.080) and is cross-referenced with other GOSTs that govern reagents, apparatus, and analysis procedures for oil‑related materials.

Q: What are the key keywords?

A: Additives; additive-containing oils; phosphorus; photometric method; colorimetry; oxygen bomb combustion; orthophosphoric acid; vanadyl reagent; ammonium molybdate.