SIST ISO 10359-2:2000 PDF

Name: SIST ISO 10359-2:2000 — Water quality -- Determination of fluoride -- Part 2: Determination of inorganically bound total fluoride after digestion and distillation
SKU: SIST ISO 10359-2:2000
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Water quality -- Determination of fluoride -- Part 2: Determination of inorganically bound total fluoride after digestion and distillation

Название (английский):

SIST ISO 10359-2:2000

Water quality -- Determination of fluoride -- Part 2: Determination of inorganically bound total fluoride after digestion and distillation

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 7
Дата публикации:: 1 января 2000 г.
ICS:: 13.060.50
Технический комитет:: KAV - Water quality

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Описание (английский):

Specifies a method for the determination of inorganically bound total fluoride. The method is applicable to waste waters which are highly contaminated inorganically, with a fluoride ion concentration of more than 0,2 mg/l.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 10359-2:1994 - "Water quality - Determination of fluoride - Part 2" defines a laboratory procedure for the determination of inorganically bound total fluoride in water after chemical digestion and steam distillation. The method is intended primarily for industrial and waste waters that are highly inorganic‑contaminated, with fluoride ion concentrations above 0.2 mg/L. The standard describes sample preparation, digestion (alkaline evaporation and fusion), steam distillation (phosphoric/sulfuric acid), and potentiometric measurement using a fluoride ion‑selective electrode.

Key topics and technical requirements

Scope & applicability: For inorganically bound total fluoride in heavily contaminated wastewaters (>0.2 mg/L).

Interferences: Recognizes complexation and precipitation with cations (Ca2+, Mg2+, Al3+, Fe3+) and boron-fluoride complexes; uses digestion and distillation to eliminate these interferences.

Sample preparation: Evaporation to dryness in alkaline medium, fusion of residue with sodium hydroxide, dissolution prior to distillation.

Distillation: Steam distillation in presence of phosphoric and sulfuric acids; recommended distillate volume and distillation rate control.

Measurement: Potentiometric determination with a fluoride ion‑selective electrode calibrated with a series of standard solutions and measured in a TISAB (total ionic strength adjustment buffer) at controlled temperature (≈25 °C).

Reagents & apparatus: Specifies analytical‑grade reagents (HCl, H3PO4, H2SO4, NaOH, TISAB components), nickel dishes/crucibles, borosilicate distillation glassware, heating jacket, magnetic stirrer and a millivoltmeter/ion‑selective electrode system.

Quality control: Daily calibration checks, electrode conditioning, blank determinations, and periodic calibration after digestion/distillation; electrode slope should be ≥55 mV per decade change in fluoride concentration.

Precision: Interlaboratory trials were conducted (reported in the standard) to establish repeatability and reproducibility.

Applications

Regulatory and compliance testing of industrial effluents and concentrated wastewaters for total fluoride content.

Environmental monitoring where fluoride is bound in inorganic complexes not measurable by direct electrode methods.

Treatment plant influent/effluent characterization and forensic analyses of contaminated sites.

Related standards

ISO 10359-1 - Electrochemical probe method for potable and lightly polluted water (direct measurement).

ISO 5667-3 - Guidance on sampling, preservation and handling of water samples.

Keywords: ISO 10359-2:1994, water quality, fluoride determination, inorganically bound total fluoride, steam distillation, ion‑selective electrode, TISAB, waste water analysis.

SIST ISO 10359-2:2000 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications

Who should use this standard

Related standards

Технические детали

ISO 10359-2:1994

Water quality — Determination of fluoride — Part 2: Determination of inorganically bound total fluoride after…

SIST ISO 10359-1:1996

Water quality -- Determination of fluoride -- Part 1: Electrochemical probe method for potable and lightly po…

ISO 5667-3:2024

Water quality — Sampling — Part 3: Preservation and handling of water samples