ISO 3830-1993 PDF

Full title and description

ISO 3830:1993 — Petroleum products — Determination of lead content of gasoline — Iodine monochloride method. This International Standard specifies a wet-chemical analytical procedure for measuring total lead (as tetraalkyl lead species) in gasoline using iodine monochloride oxidation, extraction and complexometric titration.

Abstract

ISO 3830:1993 defines a laboratory method to determine total lead content in gasoline containing lead alkyl additives. The method covers sample preparation, reagents and apparatus, the iodine monochloride oxidation/extraction sequence, conversion of organic lead to inorganic lead, and final determination by titration with EDTA using an appropriate indicator. The procedure is intended for concentrations between 0.026 g and 1.300 g of lead per litre and excludes gasoline containing manganese anti‑knock additives.

General information

• Status: Published (International Standard; confirmed in periodic ISO reviews).
• Publication date: 1993 (Edition 3, published in 1993 — publication listed as 1993-10 / implementation dates reported in September 1993).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 75.160.20 (Liquid fuels — Petroleum products).
• Edition / version: Edition 3 (1993).
• Number of pages: 5 pages (concise method standard).

Scope

Specifies a method for the determination of total lead content in gasoline containing tetraalkyl lead additives, applicable over the range 0.026 g to 1.300 g of lead per litre. The standard is not applicable to gasoline containing manganese anti‑knock additives. The method covers required reagents and apparatus, sample dilution and extraction, destruction of excess reagent and organic matter, buffering, and titrimetric lead determination.

Key topics and requirements

• Applicable concentration range: 0.026–1.300 g Pb per litre (limits of the validated method).
• Exclusions and interferences: not suitable for gasoline with manganese anti‑knock additives; organic interferences removed by nitric acid oxidation as part of the procedure.
• Principle: oxidation with iodine monochloride, aqueous extraction of reaction products, evaporation/decomposition of free reagent, conversion of organo‑lead to inorganic lead, buffer to pH ~5 and titration with Na2EDTA using xylenol orange (or equivalent) as indicator.
• Normative references and apparatus: refers to laboratory glassware and related ISO references (for example ISO 1042 volumetric flasks, ISO 1770 thermometers, and other laboratory standards cited in the text).
• Quality and reporting: sample handling, reagent purity, blank determinations and calculation of lead concentration by titration data are specified to ensure reproducibility and traceability.

Typical use and users

Used by petroleum and fuel testing laboratories, refinery quality control, regulatory and environmental monitoring bodies, national standards institutes, and laboratories performing conformity testing of gasoline for lead content. It is suited to routine and compliance testing where tetraalkyl lead additives are present and within the method's concentration range.

Related standards

Related or referenced standards include the withdrawn ISO 3830:1981 (earlier edition), and laboratory equipment/method standards cited in the norm such as ISO 1042 (volumetric flasks), ISO 1770 (thermometers) and ISO 3007 (vapour pressure — Reid method) among others referenced in the normative clauses. Regional/adopted versions (for example EN/UNE adaptations) may exist that incorporate ISO 3830:1993 text.

Keywords

lead content; gasoline; petroleum products; iodine monochloride; titration; EDTA; xylenol orange; analytical method; fuel testing; tetraalkyl lead.

FAQ

Q: What is this standard?

A: ISO 3830:1993 is an International Standard that defines a laboratory procedure (iodine monochloride method) to determine total lead content in gasoline containing lead alkyl additives.

Q: What does it cover?

A: It covers the principle, reagents, apparatus, sample preparation, procedural steps (oxidation/extraction, destruction of excess reagent and organic matter), buffering and the final titrimetric determination of lead by EDTA titration, within a specified concentration range. It also states limitations (not applicable to gasoline with manganese anti‑knock additives).

Q: Who typically uses it?

A: Refinery and independent fuel testing laboratories, regulatory agencies, standards bodies and any organization needing to quantify lead in gasoline for quality control or compliance testing.

Q: Is it current or superseded?

A: ISO 3830:1993 is the published edition (Edition 3, 1993). According to ISO lifecycle information the 1993 edition replaced the 1981 edition and has been subject to periodic review/confirmation; as of the last ISO confirmation entries it remained published/confirmed in ISO records. Users should verify the current status with their national standards body or ISO catalog if strict up‑to‑date confirmation is required.

Q: Is it part of a series?

A: It is part of ISO technical work on petroleum products and fuel testing maintained under ISO/TC 28; it has an earlier edition (ISO 3830:1981) and is referenced alongside other ISO methods covering fuel properties and laboratory apparatus.

Q: What are the key keywords?

A: Lead content, gasoline, iodine monochloride, EDTA titration, fuel testing, petroleum products, tetraalkyl lead, analytical method.