ISO 4722-2:2024

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ISO 4722-2:2024 is an International Standard published by the International Organization for Standardization (ISO) that specifies a method for determining thorium-232 (232Th) in water using inductively coupled plasma mass spectrometry (ICP-MS). The standard provides a way to measure the mass concentration of 232Th, which can be converted to activity concentration. This method is applicable to various water samples like drinking water and rainwater.