Oxidation method affects radiocarbon analysis of natural solid samples: Implications for elemental analyzer vs. closed tube combustion - Seung-Cheol Lee; Gwan-Ho Lee; Hyunshin Koh; Eun-Ju Lee; Byung-Yong Yu; Jin Hur; Sunghwan Kim; Kyung-Hoon Shin; Neung-Hwan Oh (Marine Pollution Bulletin, 2026)