GOST 31954-2012 PDF

Full title and description

ГОСТ 31954-2012 — Вода питьевая. Методы определения жесткости (GOST 31954-2012 — Drinking water. Methods of hardness determination). The standard specifies laboratory methods for determining the hardness of natural waters (surface and groundwater) and drinking water (including water packaged for supply).

Abstract

GOST 31954-2012 defines sampling provisions and analytical procedures to determine total hardness of drinking and source waters. It establishes a complexonometric titration method (Method A) and atomic-spectrometric methods (Methods B and V) for the measurement of calcium and magnesium that together constitute total hardness reporting. The standard includes normative references, requirements for sample collection and preparation, and calculation/reporting formats.

General information

• Status: Entered into force / active (introduced 01 January 2014; listed as действующий / введен впервые).
• Publication date: Introduced 01.01.2014 (approved by the intergovernmental council 03.12.2012; registered by Rosstandart 12.12.2012).
• Publisher: Published/issued by Стандартинформ (editions/republishing noted 2013 and later vendor copies).
• ICS / categories: 13.060 — Water quality (examination of water for chemical substances / drinking water).
• Edition / version: Designation GOST 31954-2012 (adopted 2012, in force from 2014).
• Number of pages: Vendor and database records list the text as approximately 17 pages (electronic PDF) with some vendor catalogues listing 19 pages for printed versions — counts vary by edition/format.

Scope

The standard applies to natural waters (surface and groundwater), sources of drinking-water supply and to drinking water (including bottled/packaged water). It specifies: sampling rules; a complexonometric (EDTA) titrimetric procedure for total hardness (Method A); and atomic-spectrometric procedures (Methods B and V) for determination of the contributing cations (Ca, Mg) used to calculate hardness. It is intended for routine control, regulatory monitoring and laboratory reporting of total hardness.

Key topics and requirements

• Defined scope and sampling requirements for source and drinking waters (sample collection, preservation and sample volume requirements as referenced).
• Method A — complexonometric titration (EDTA titration) for determination of total hardness; procedural steps, reagents and calculation of results.
• Methods B and V — methods based on atomic spectrometric techniques for determination of Ca and Mg (used to compute total hardness); instrumental conditions, calibration and reporting guidance.
• Normative references and cross-references to related GOSTs (units of hardness, sampling standards, and laboratory competence requirements such as ISO/IEC 17025).
• Requirements for calculation and expression of hardness (units, conversions and reporting conventions are aligned with related GOSTs).

Typical use and users

Primary users are analytical and environmental laboratories, water utility laboratories, regulatory agencies, bottled/packaged water producers, environmental consultancies and research institutions that perform water-quality testing. The standard is used for routine monitoring, compliance testing, and reference method implementation for hardness determination in drinking water and source waters.

Related standards

GOST 31954-2012 cross-references and complements several water-quality and laboratory standards, for example: GOST 31865-2012 (unit of hardness), GOST 31870-2012 (determination of elements by atomic spectrometry), GOST 31861/31862 series (sampling and general requirements for sampling), and GOST R 52407-2005 (earlier methods for hardness). It also refers to laboratory competence and measurement standards such as ГОСТ ИСО/МЭК 17025-2009.

Keywords

drinking water, water hardness, total hardness, complexonometric titration, EDTA, atomic spectrometry, calcium, magnesium, sampling, water analysis, GOST

FAQ

Q: What is this standard?

A: GOST 31954-2012 is a Russian (interstate) standard that specifies methods for determining the hardness of drinking water and source waters, including a titrimetric EDTA method and atomic spectrometric methods.

Q: What does it cover?

A: It covers sampling provisions, a complexonometric titration method (Method A) for total hardness, and atomic-spectrometric procedures (Methods B and V) to quantify Ca and Mg; it also lists normative references and reporting/calculation rules.

Q: Who typically uses it?

A: Environmental and water testing laboratories, water suppliers and utilities, bottled-water producers, regulatory bodies and researchers performing water quality assessment.

Q: Is it current or superseded?

A: As of the database records and vendor listings, GOST 31954-2012 is in force (introduced 01.01.2014) with at least one amendment recorded (a 2016 correction noted in registration information). Users should check national registries or the issuing body for the latest status before regulatory use.

Q: Is it part of a series?

A: Yes — it is part of a set of GOST standards covering water quality and analytical methods (related documents include standards on units of hardness, sampling, atomic-spectrometric element determination and other drinking-water testing methods).

Q: What are the key keywords?

A: Drinking water; hardness; total hardness; EDTA titration; complexonometric; atomic absorption / atomic spectrometry; calcium; magnesium; sampling; water analysis; GOST 31954-2012.