SIST ISO 11923:1998 PDF

Name: SIST ISO 11923:1998 — Water quality -- Determination of suspended solids by filtration through glass-fibre filters
SKU: SIST ISO 11923:1998
Price: 43.71 EUR
Availability: InStock

Water quality -- Determination of suspended solids by filtration through glass-fibre filters

Название (английский):

SIST ISO 11923:1998

Water quality -- Determination of suspended solids by filtration through glass-fibre filters

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 6
Дата публикации:: 1 января 1998 г.
ICS:: 13.060.60
Технический комитет:: KAV - Water quality

Тип поставки:

Full version90 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:1 раб. дн. (перевод)

Цена:90 €

Описание (английский):

Describes a method for the determination of suspended solids in raw waters and waste waters by filtration though glass-fibre filters. The lower limit of the determination is approximately 2 mg/l. Floating oil and other immiscible organic liquids interfere.

Abstract

Overview

Key topics and requirements

Principle: Filter a measured sample volume, dry the filter at 105 °C ± 2 °C, and determine the mass increase gravimetrically.
Filters: Use borosilicate glass‑fibre filters containing no binders. Mass loss in a blank must be < 0.3 mg per filter; areic mass typically 50–100 g/m².
Equipment: Vacuum or pressure filtration apparatus, drying oven (105 °C ± 2 °C), analytical balance with at least 0.1 mg resolution, suitable drying supports.
Sample handling:
- Prefer analysis within 4 hours of sampling; if stored, keep dark at < 8 °C (do not freeze).
- Do not add chemical preservatives for suspended solids analysis.
- Report any storage time > 4 hours in the test report.
Procedure specifics:
- Select sample volume so dry residue on filter is optimally 5–50 mg; results must be based on at least 2 mg dry residue. Avoid sample volumes > 1 L.
- For samples with > 1 000 mg/L dissolved solids, use extended washing (three 50 mL washes).
- Calculation: p (mg/L) = 1000 × (b − a) / V where b = filter mass after filtration (mg), a = filter mass before filtration (mg), V = sample volume (mL).
Quality control: Run a control using the working reference cellulose suspension; recovery should be 90–110%.
Interferences: Floating oil/immiscible organics can bias results; Annex B describes oil removal (ethanol then hexane) but requires reporting if used.
Reporting: Include filter manufacturer/type, sample ID, date/place, any deviations, and result (below 2 mg/L reported as “below 2 mg/L”).

Applications and users

Environmental and compliance monitoring of rivers, lakes, raw water intakes and wastewater effluents
Wastewater treatment plant performance checks and process control
Contract and regulatory testing laboratories, environmental consultants, research institutions, and water utilities
Useful for sediment load measurements, turbidity correlation studies and routine operational monitoring

Related standards

ISO 5667-2:1991 - Water quality - Sampling - Part 2: Guidance on sampling techniques
ISO 6107-2 - Water quality - Terminology (referenced for definitions)

Keywords: ISO 11923, water quality, suspended solids, filtration, glass‑fibre filters, wastewater testing, effluent monitoring, gravimetric determination.

Технические детали

SKU: SIST ISO 11923:1998

Главная

Каталог

ISO 11923:1997

Действующий

Water quality — Determination of suspended solids by filtration through glass-fibre filters

Overview ISO 11923:1997 specifies a standardized laboratory method for the determination of suspended solids in raw waters, waste waters and effluents by filtration through glass‑fibre filters. The m…

6 · PDF

25 €