IS 3025 : Part 82 : 2024/ISO 15923-1 : 2013 Methods of Sampling and Test (Physical and Chemical) for Water and Wastewater - Part 82 Ammonium, Nitrate, Nitrite, Chloride, Orthophosphate, Sulfate and Silicate with Photometric Detection
NATIONAL FOREWORD
This Indian Standard (Part 82) which is identical with ISO 15923-1 : 2013 'Water quality - Determination of selected parameters by discrete analysis systems - Part 1: Ammonium, nitrate, nitrite, chloride, orthophosphate, sulfate and silicate with photometric detection' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of Water Quality Sectional Committee and approval of the Chemical Division Council.
The Indian Standard IS 3025 : 1964 'Methods of sampling and test (physical and chemical) for water used in industry' prescribes the methods of test for various parameters in water and wastewater. The Committee responsible for formulating this standard has decided to harmonize the methods of test prescribed in IS 3025 with those prescribed in ISO standards. Accordingly, the committee decided to retain IS 3025 and publish the harmonized/ adopted test methods published by ISO in various parts of IS 3025 as this standard is widely recognized by water testing laboratories. The committee had further decided to publish the new test methods adopted/harmonized standards as a new standard and as a subsequent part/section of IS 3025.
In this standard many photometric determinations can be automated with a discrete analysis system. With one single apparatus, a large number of different parameters can be determined, and the parameters to be determined can be specified for each sample. Working with small volumes requires less sample material and reagent. Samples that fall beyond the normal measuring range can either be automatically diluted or measured again with a different measuring range.
This standard specifies methods for the automatic determination of ammonium, nitrate, nitrite, chloride, orthophosphate, and silicate with photometric detection and a turbidimetric determination of sulfate using a discrete analysis system. The field of application is water (ground, potable, surface, waste, eluates, and boiler water).
The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:
a) Wherever the words 'International Standard' appears referring to this standard, they should be read as 'Indian Standard'; and
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.