IS 3025 : Part 71 : 2021/ISO 14911 : 1998 Methods of Sampling and Test ( Physical and Chemical ) for Water and Wastewater - Part 71 Determination of Dissolved Cations Using Ion Chromatography

New Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 71) which is identical with ISO 14911 : 1998 ‘Water quality — Determination of dissolved Li+, Na+, NH4+, K+, Mn2+, Ca2+, Mg2+, Sr2+ and Ba2+ using ion chromatography — Method for water and waste water’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of the Water Quality Sectional Committee and approval of the Chemical Division Council.

The monitoring of water quality parameters is currently subject of research interest due to the requirements of the environmental protection, human health and introduction of new technologies. Anions and cations are routinely analyzed with the traditional classical chemical methods, including titration, photometry, or colorimetric methods. Unfortunately, many of these techniques suffer from interferences and limited accuracy. They can also be labor-intensive and difficult to automate. Thus, more effective, repeatable, and cheaper methods are required for precise estimation of specific requirements/parameters. In this respect, ion chromatography has become an alternative to the classic wet methods, especially for laboratories that need to analyze inorganic and organic ions in a large number of samples. This Standard specifies a method for the determination of the dissolved cations Li+, Na+, NH4+, K+, Mn2+, Ca2+, Mg2+, Sr2+ and Ba2+ in water (e.g. potable water, surface water, waste water).

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies and conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker, while in Indian Standards, the current practice is to use a point (.) as the decimal marker.