★Низкие цены. Оригиналы и переводы — экономьте время и бюджет.

Каталог Подписки О компании Поддержка и оплата Публичная оферта Контакты

Поиск

Корзинапуста

GLSTDStandards Store

Официальный магазин стандартов ГОСТ, ISO, ASTM. Электронная доставка, актуальные редакции, прозрачные цены.

Компания

О компании
Контакты
Поддержка и оплата

Помощь

Каталог
Корзина
Поиск

Правовая информация

Публичная оферта
Политика конфиденциальности
Условия использования

Способы оплаты:VisaMastercardMIRСБПЮMoneyСберТинькоффPayPalApple PayGoogle PayKlarnaStripe

ISO 5809:1982 PDF — Starches and derived products — Determination of sulphated ash — GOST Standards

//ISO 5809:1982

ISO 5809:1982

Name: ISO 5809:1982 — Starches and derived products — Determination of sulphated ash
SKU: ISO 5809:1982
Price: 25 EUR
Availability: InStock

Starches and derived products — Determination of sulphated ash

Название (английский):

ISO 5809:1982

Starches and derived products — Determination of sulphated ash

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 3
Дата публикации:: 1 декабря 1982 г.
Издание:: ISO IS 5809 edition 1 version 1
ICS:: 67.180.20

Тип поставки:

Full version25 €Ask AI2 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:1 рабочий день

Цена:25 €

Описание (английский):

Incineration of a test portion, in the presence of sulphuric acid, at a temperature of 525 25 °C. The result is expressed as a percentage by mass either of the product as received or on dry basis.

Abstract

Overview

ISO 5809:1982 specifies a standardized laboratory method for the determination of sulphated ash in starches and derived products. The procedure is based on controlled incineration of a test portion in the presence of sulphuric acid at . Results are reported as a , either or , and rounded to two decimal places. This method supports quality control, product specification and ingredient evaluation in starch processing and food industries.

Key topics and technical requirements

Principle: Incineration of an accurately weighed test portion with sulphuric acid to convert volatile chlorides to non‑volatile sulphates and destroy organic matter.
Temperature and equipment:
- Electric furnace with air circulation controlled at 525 ± 25 °C.
- Incineration dish (platinum or silica) capacity 100–200 ml, minimum useful surface 15 cm².
- Analytical balance, desiccator, hot plate/gas burner, water bath (60–70 °C).
Reagents:
- Sulphuric acid solution: prepare by adding 100 ml concentrated H2SO4 to 300 ml water (handle carefully).
- Hydrochloric acid cleaning solution: 100 ml concentrated HCl to 500 ml water.
Procedure highlights:
- Prepare and pre-calcinate the dish to constant mass (weigh to 0.0002 g).
- Weigh representative test portion (typical sample ≈ 5 g; special dilution procedures provided for bulky samples).
- Add 5 ml sulphuric acid solution to the sample, pre‑incinerate to carbonize, then incinerate in furnace until carbon residue disappears (typically ~2 h), cool, add drops of acid, re‑incinerate (~0.5 h) and weigh.
- Perform two determinations and report the arithmetic mean if repeatability criteria are satisfied.
Performance criteria:
- Results expressed to two decimal places.
- Repeatability and reproducibility limits are specified (e.g., reproducibility: 0.1 g/100 g for ash < 0.5%; 20% of mean for ash between 0.5–5%; 1% of mean for ash > 5%; repeatability limits also defined).

Applications and who uses it

Quality control laboratories in starch production and starch‑derived product manufacturing.
Food ingredient suppliers and formulators verifying mineral/ash content.
Regulatory bodies and certification labs validating product compliance and label claims.
Research and development groups studying composition, processing effects or formulations involving starches and syrups.
Uses include specification compliance, contamination monitoring (e.g., mineral residues), product grading and formulation optimization.

Related standards

ISO 1666 - Determination of moisture/loss on drying (relevant for dry‑basis reporting)
ISO 1741, ISO 1742, ISO 1743 - Determination of dry matter for glucose/dextrose/glucose syrups

Keywords: ISO 5809, ISO 5809:1982, sulphated ash, starches and derived products, incineration method, ash content, analytical method, dry basis.

Технические детали

Технический комитет: ISO/TC 93 - Starch (including derivatives and by-products)
SKU: ISO 5809:1982

Главная

Каталог

BS EN ISO 1666:1998

Действующий

Starch. Determination of moisture content. Oven-drying method.

PDF

50 €

ISO 17410:2019

Действующий

Microbiology of the food chain — Horizontal method for the enumeration of psychrotrophic microorganisms

Overview ISO 17410:2019 defines a horizontal method for the enumeration of psychrotrophic microorganisms in the food chain. The standard covers organisms able to form colonies on solid agar after aer…

10 · PDF

25 €