ISO 13163-2021 pdf free download – Water quality — Lead-210 — Test method using liquid scintillation counting.
This document specifies a method for the measurement of 210Pb in all types of waters by liquidscintillation counting (LSC).
The method is applicable to test samples of supply/drinking water, rainwater, surface and ground water,as well as cooling water, industrial water, domestic, and industrial wastewater after proper samplingand handling, and test sample preparation.Filtration of the test sample is necessary. Lead-210 activityconcentration in the environment can vary and usually ranges from 2 mBq 11 to 300 mBq 1 [22][28],Using currently available liquid scintillation counters, the limit of detection of this method for 210pbis generally of the order of 20 mBq l1 to 50 mBq l1, which is lower than the WHO criteria for safeconsumption of drinking water (100 mBq 1-1).14][6I These values can be achieved with a counting timebetween 180 min and 720 min for a sample volume from 0,5 l to 1,5 !.Higher activity concentrationscan be measured by either diluting the sample or using smaller sample aliquots or both.The methodpresented in this document is not intended for the determination of an ultra-trace amount of 210Pb.The range of application depends on the amount of dissolved material in the water and on theperformance characteristics of the measurement equipment (background count rate and countingefficiency).
The method described in this document is applicable to an emergency situation.The analysis of Pb adsorbed to suspended matter is not covered by this method.
lt is the user’s responsibility to ensure the validity of this test method for the water samples tested.
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies.Forundated references, the latest edition of the referenced document (including any amendments) applies.ISO/IEC Guide 98-3, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty inmeasurement (GUM:1995)
ISO/IEC Guide 99,International vocabulary of metrology — Basic and general concepts and associatedterms (VIM)
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 5667-1,Water quality – Sampling —Part 1:Guidance on the design of sampling programmes andsampling techniques
ISO5667-3, Water quality —Sampling —Part 3: Preservation and handling of water samples
ISO5667-10, Water quality —Sampling —Part 10: Guidance on sampling of waste water
ISO 11929 (all parts), Determination of the characteristic limits (decision threshold, detection limit andlimits of the coverage interval) for measurements of ionizing radiation —Fundamentals and applicationISO/IEC 17025,General requirements for the competence of testing and calibration laboratories
ISO 19361, Measurement of radioactivity —Determination of beta emitters activities—Test method usingliquid scintillation counting
ISO 80000-10,Quantities and units — Part 10: Atomic and nuclear physics
3Terms, definitions and symbols
3.1Terms and definitions
For the purposes of this document, the terms and definitions given in ISo 80000-10, the IsSo 11929series, ISO/IEC Guide 98-3 and ISO/IEC Guide 99 apply
ISO and lEC maintain terminological databases for use in standardization at the following addresses:-ISo Online browsing platform: available at https://www.iso.org/obp
—IEC Electropedia: available at http://www.electropedia.org/ISO 13163 pdf download.