anx_I__cpt_2__cpt_2__item_11__text_1
where appropriate, the relative isotope levels of the constituent elements of water, oxygen (^(16)O — ^(18)O) and hydrogen (protium, deuterium, tritium);
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Source: EUR-Lex (Cellar) · retrieved 2026-11-10 · Text as adopted (Official Journal); later amendments are not incorporated in this text.