IS 3025 : Part 49 : 2024 Methods of Sampling and Test (Physical and Chemical) for Water and Wastewater - Part 49 Zinc
1 SCOPE
1.1 This standard (Part 49) prescribes the following methods for determination of zinc in water and wastewater:
a) Atomic absorption method (direct) (method is applicable in range from 0.01 mg/l of Zn to 2.0 mg/l of Zn);
b) Atomic absorption method (chelationextraction) (method is applicable in range from 1 ìg/l of Zn to 200 ìg/l of Zn);
c) Differential pulse anodic stripping voltammetry (DPASV) (method is applicable in range from 1.0 ìg/l of Zn to 100 ìg/l of Zn); and
d) Inductively coupled plasma (ICP) spectroscopy methods.
1.2 Depending upon the concentration range and interference levels, choice of the method is made. When the concentration levels are below 200 ìg/l, preconcentration is carried out either by chelation and extraction prior to atomic absorption spectrophotometer (AAS) or by deposition on a mercury drop electrode as in DPASV method. For dissolved zinc content, filtration through 0.45 ìm membrane filter is required.
2 REFERENCES
The standards listed in Annex A contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publications, the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of these standards.
| IS No. | Title |
| IS 1070 : 2023 | Reagent grade water - Specification (fourth revision) |
| IS 3025 | Methods of sampling and test (physical and chemical) for water and wastewater |
| (Part 2) : 2019/ISO 11885 : 2007 | Determination of selected elements by inductively coupled plasma optical emission spectrometry (ICPOES) (first revision) |
| (Part 65) : 2022/ISO 17294-2 : 2016 | Application of inductively coupled plasma mass spectrometry (ICP-MS) - Determination of selected elements including uranium isotopes (first revision) |
| IS 7022 (Part 1) : 1973 | Glossary of term relating to water, sewage and industrial effluents: Part 1 |
| IS 7022 (Part 2) : 1979 | Glossary of term relating to water, sewage and industrial effluents: Part 2 |
| IS 17614 | Water quality - Sampling |
| (Part 1) : 2021/ISO 5667-1 : 2020 | Guidance on the design of sampling programmes and sampling techniques |
| (Part 3) : 2021/ISO 5667-3 : 2018 | Preservation and handling of water samples |