ISO 6844:1983 PDF

Name: ISO 6844:1983 — Surface active agents — Determination of mineral sulfate content — Titrimetric method
SKU: ISO 6844:1983
Price: 25 EUR
Availability: InStock

Surface active agents — Determination of mineral sulfate content — Titrimetric method

Название (английский):

ISO 6844:1983

Surface active agents — Determination of mineral sulfate content — Titrimetric method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 3
Дата публикации:: 1 февраля 1983 г.
Издание:: ISO IS 6844 edition 1 version 1
ICS:: 71.100.40

Тип поставки:

Full version45 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:1 раб. дн. (перевод)

Цена:45 €

Описание (английский):

A buffered acetonic solution of a test portion is titrated with a standard volumetric lead(II) nitrate solution in the presence of dithizone as indicator. The method is applicable to anionic surface active agents, containing sodium, ammonium and alkanolamine sulphates. It is not applicable to products containing other compounds such as phosphates or large amounts of chloride nor is it applicable in the presence of large amounts of salts of weak acids (for example, soaps or monoesters of sulphosuccinic acid).

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 6844:1983 specifies a titrimetric method for the determination of mineral sulfate content in surface active agents (surfactants). The procedure uses a buffered acetone medium and a standard volumetric lead(II) nitrate solution with dithizone as the end-point indicator. ISO 6844 is intended for anionic surfactants containing sodium, ammonium and alkanolamine sulfates and provides laboratory instructions, calculation formulae and precision data for routine quality control.

Key topics and requirements

Principle: titration of a buffered acetonic solution of the test portion with a standard volumetric Pb(NO3)2 solution in the presence of dithizone; endpoint is a stable brick‑red color.

Applicability: suitable for anionic surface active agents with sodium, ammonium or alkanolamine sulfates. Not applicable when interfering species are present (e.g., phosphates, large amounts of chloride, or large quantities of salts of weak acids such as soaps or monoesters of sulfosuccinic acid).

Reagents and conditions: acetone solvent, dithizone indicator (0.5 g/L in acetone, store in dark), ammonium dichloroacetate buffer to control apparent pH (~4.1 ± 0.2 in acetone), and a prepared standard lead(II) nitrate solution. The method requires an acetone content of about 70–85% (V/V) in the final titration mixture.

Procedure overview: prepare a laboratory sample, dissolve and dilute the test portion, take an aliquot, add dithizone, adjust apparent pH (NaOH / HNO3), add buffer and acetone, then titrate with lead(II) nitrate until the stable brick‑red endpoint is reached (stable for ~15 s).

Results and precision: the standard provides the calculation for percent sodium sulfate and reports inter‑laboratory precision data (examples for low and moderate sulfate contents with given repeatability and reproducibility statistics).

Applications and users

Quality control laboratories in detergent and surfactant manufacturing for routine sulfate determination.

Raw material inspection and incoming goods testing where quantifying mineral sulfate content is required.

Regulatory and compliance testing where standardized, traceable methods are needed.

Analytical chemistry labs specializing in volumetric analysis and titrimetric methods.

Related standards

ISO 607 - Sample division for surface active agents and detergents

ISO 1042 - One‑mark volumetric flasks

ISO 648 / ISO 835‑2 - Pipettes

ISO 385‑2 - Burettes

Follow ISO 6844:1983 exactly for reagent concentrations, buffer preparation and calculation inputs. This ensures accurate, reproducible mineral sulfate results for anionic surfactants.

ISO 6844:1983 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

SIST EN ISO 6076:2023

Adhesives - Installation of floor coverings, wood flooring, levelling compounds and tiles - Specification of…

BS EN ISO 10427-1:2024

Oil and gas industries including lower carbon energy. Equipment for well cementing. Casing bow-spring central…

ISO 6487:2015/Amd 1:2017

Road vehicles — Measurement techniques in impact tests — Instrumentation — Amendment 1

SIST EN ISO 835:2007

Laboratory glassware - Graduated pipettes (ISO 835:2007)

BS EN ISO 385:2005

Laboratory glassware. Burettes.