ISO 697-1981 rus PDF

Full title and description

Surface active agents — Washing powders — Determination of apparent density — Method by measuring the mass of a given volume. This entry refers to the ISO international standard ISO 697:1981 and its Russian-language edition/translation (Ст ISO 697-1981).

Abstract

Specifies a laboratory method to determine the apparent (bulk) density of washing powders by filling a receiver of known volume from a specified funnel and weighing the mass obtained. The method is intended for free‑flowing powders and, with suitable funnel selection, for powders that tend to cake; it is not suitable for powders containing large lumps that cannot be readily disintegrated.

General information

• Status: Published / active (ISO bibliographic record shows the standard as published and maintained).
• Publication date: 1 March 1981 (Edition 2, 1981).
• Publisher: International Organization for Standardization (ISO); Russian translation/collection editions are available from national/translation distributors.
• ICS / categories: 71.100.40 — Surface active agents (detergents and related products).
• Edition / version: Edition 2 (1981).
• Number of pages: 3.

Scope

This standard specifies a procedure for determining the apparent (bulk) density of washing powders by measuring the mass of a fixed volume of sample obtained through a specified filling funnel and receiver. It covers sample filling, apparatus dimensions (receiver of known volume, specified funnel), weighing and calculation of apparent density, and notes limitations for powders that cake or contain large lumps. Normative references include related methods for bulk density and sample division.

Key topics and requirements

• Definition of apparent (bulk) density for washing powders and its relevance to packaging and performance.
• Required apparatus: receiver of known internal volume, specified funnel(s) and balance of suitable accuracy.
• Sample preparation and handling rules (free‑flowing samples vs. caked samples; disintegration of lumps only if it does not break down particles).
• Stepwise procedure: fill receiver from funnel under specified conditions, level or trim excess if required, determine mass and compute density (mass/volume).
• Reporting requirements and statement of method limitations (when alternative methods are needed).
• Normative cross-references such as ISO 3424 and ISO 607 (related test methods and sample division).

Typical use and users

Used by detergent and powdered-cleaning-product manufacturers, quality control and analytical laboratories, test houses, regulators and research groups that require a standardized measurement of bulk/apparent density for product specification, packaging design, dosing formulation and comparative testing. Availability of Russian-language editions supports use in Russian-speaking laboratories and suppliers.

Related standards

Normative and related standards referenced or commonly used alongside ISO 697 include ISO 3424 (bulk density determinations for related substances), ISO 607 (methods of sample division for surface active agents and detergents) and other ISO/TC 91 detergent testing methods. Users should consult the full list of normative references in the standard text.

Keywords

apparent density, bulk density, washing powders, detergents, surface active agents, sample preparation, funnel method, ISO 697, Russian translation.

FAQ

Q: What is this standard?

A: ISO 697:1981 is an international test method that specifies how to determine the apparent (bulk) density of washing powders by measuring the mass of a defined volume of sample. The item referenced as "St ISO 697-1981 rus" indicates the ISO 697:1981 standard and its Russian-language edition/translation.

Q: What does it cover?

A: It covers equipment, sample handling, the procedure for filling a receiver of known volume from a specified funnel, weighing the sample and calculating apparent density, plus limitations for samples that cake or contain large lumps.

Q: Who typically uses it?

A: Manufacturers of powdered detergents, QC and QA laboratories, independent testing bodies, formulation and packaging engineers, and regulators concerned with product specification and consistency. Russian translations are used by Russian-speaking laboratories and suppliers.

Q: Is it current or superseded?

A: The bibliographic record for ISO 697 indicates the 1981 (Edition 2) publication; ISO lists the standard as published and maintained in its lifecycle. Users should check national catalogues or ISO for the most recent status before relying on the standard for regulatory purposes.

Q: Is it part of a series?

A: It is part of the body of ISO methods developed by ISO/TC 91 for surface active agents and detergents; related methods include ISO 607 and ISO 3424 and other detergent testing standards.

Q: What are the key keywords?

A: Apparent density, bulk density, washing powders, detergents, surface active agents, funnel filling method, sample division, ISO 697.