ISO 10359-1-1992 PDF

Full title and description

ISO 10359-1:1992 — Water quality — Determination of fluoride — Part 1: Electrochemical probe method for potable and lightly polluted water. This part specifies an ion‑selective electrode (electrochemical probe) method for the direct determination of dissolved fluoride in drinking, fresh and lightly polluted waters.

Abstract

The standard defines an electrochemical probe technique based on a fluoride ion‑selective electrode and a reference electrode. Under the method’s specified conditions (buffering, decomplexing reagents and preparation), the procedure measures fluoride concentration reliably over a wide range and is intended for potable and lightly polluted waters rather than heavily contaminated waste waters.

General information

• Status: Published — last reviewed and confirmed (confirmed 3 July 2024) and remains the current version.
• Publication date: December 1992 (1992-12).
• Publisher: ISO (International Organization for Standardization).
• ICS / categories: 13.060.20 (Drinking water); 13.060.50 (Determination of chemical substances in water).
• Edition / version: Edition 1 (1992).
• Number of pages: 6 pages.

(General information sources: ISO catalogue entry and national catalogue summaries.)

Scope

Specifies an electrochemical probe (ion‑selective electrode) method for determining dissolved fluoride in potable, fresh and lightly polluted waters. The method is suitable for direct measurement of fluoride concentrations typically from about 0.2 mg/l up to 2.0 g/l; lower concentrations can be measured after concentration steps or by method adaptations described in the standard. The procedure includes measures to control pH and to decomplex fluoride bound to certain cations. It is not intended for highly polluted municipal or industrial wastewaters (those are covered by Part 2).

Key topics and requirements

• Use of a fluoride ion‑selective electrode and reference electrode (electrochemical probe) as the primary measuring system.
• Measurement range and sensitivity: direct determination typically from ≈0.2 mg/l up to 2.0 g/l; lower-level determinations require concentration steps.
• Sample conditioning: buffering to control pH (to avoid HF formation) and addition of a decomplexing agent (e.g., CDTA) to release fluorides complexed with polyvalent cations.
• Described interferences and limitations: electrode response to hydroxide ions, potential suppression of measured fluoride in acid media, and cation/precipitation interferences (Ca, Mg, Fe, Al) that must be mitigated.
• Calibration and procedural notes for reliable electrochemical measurement (electrode conditioning, calibration standards, temperature considerations and quality checks).

Typical use and users

Laboratories and field teams conducting routine water‑quality testing for drinking water suppliers, environmental monitoring agencies, research laboratories studying freshwater chemistry, and industrial water quality control where potable or lightly polluted water needs fluoride monitoring. Analysts use this standard for method setup, calibration, sample preparation and interference control when using ion‑selective electrodes.

Related standards

ISO 10359 is a two‑part series. Part 2 (ISO 10359‑2:1994) covers the determination of inorganically bound total fluoride after digestion and distillation and is intended for highly contaminated inorganic waste waters and samples unsuitable for direct electrode measurement. The technical committee responsible is ISO/TC 147/SC 2 (water quality — sampling and methods of analysis).

Keywords

fluoride, water quality, ion‑selective electrode, electrochemical probe, potable water, fluoride determination, CDTA, pH buffer, ISO 10359, water analysis

FAQ

Q: What is this standard?

A: ISO 10359‑1:1992 is an ISO international standard that specifies an electrochemical probe (ion‑selective electrode) method for determining dissolved fluoride in drinking and lightly polluted waters.

Q: What does it cover?

A: It covers the principle of measurement, sample conditioning (including buffering and decomplexing), calibration, recommended procedure, measurement range (direct: ~0.2 mg/l to 2.0 g/l), and known interferences and limitations for the electrode method.

Q: Who typically uses it?

A: Water testing laboratories, environmental monitoring bodies, public‑health laboratories, utilities responsible for drinking water quality, and researchers who require a standardized electrode method for fluoride analysis.

Q: Is it current or superseded?

A: ISO 10359‑1:1992 is published and was last reviewed and confirmed (ISO life‑cycle confirmation) in 2024, so this edition remains the current version. Users should check their national adoption or amendments for local applicability.

Q: Is it part of a series?

A: Yes — ISO 10359 comprises at least two parts: Part 1 (electrochemical probe method) and Part 2 (total fluoride after digestion and distillation, ISO 10359‑2:1994). Part 2 is referenced for heavily contaminated or complex matrices not suitable for direct electrode analysis.

Q: What are the key keywords?

A: Fluoride, ion‑selective electrode, electrochemical probe, water quality, potable water, CDTA, buffering, interference control, ISO 10359.