เปรียบเทียบวิธี

	การแมสสเปกโตรเมตรีไอโซโทป (Isotope Ratio Mass Spectrometry)	การหาอายุด้วยคาร์บอน-14
สาขาวิชา	ธรณีฟิสิกส์	ธรณีฟิสิกส์
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1994	1949
ผู้ริเริ่ม	Thomas Coplen and others	Willard Libby
ประเภท	Measurement of stable and radiogenic isotope ratios	Chronometric method based on ¹⁴C decay
แหล่งต้นตำรับ	Coplen, T. B. (1994). Reporting of stable hydrogen, carbon, and oxygen isotopic abundances. Pure and Applied Chemistry, 66(2), 273-276.	Libby, W. F. (1949). Radiocarbon dating. University of Chicago Press.
ชื่อเรียกอื่น	IRMS	¹⁴C dating, Carbon-14 dating
ที่เกี่ยวข้อง	3	3
สรุป	Isotope Ratio Mass Spectrometry (IRMS) is an analytical technique that measures the relative abundance of stable isotopes (H, C, N, O, S) and some radiogenic isotopes (e.g., ⁸⁷Sr/⁸⁶Sr) in samples with high precision. Standardized by Coplen and colleagues, IRMS enables paleoclimate reconstruction, source tracing (diet, water origin), geochemical fingerprinting, and age dating through radiogenic isotopes.	Radiocarbon dating is a radiometric technique that determines the age of organic materials by measuring the radioactive decay of ¹⁴C (carbon-14), a rare isotope produced in the atmosphere by cosmic ray interactions. Developed by Willard Libby in 1949, radiocarbon dating became a foundational method in archaeology, paleoclimate studies, and geology, enabling dating of organic materials from the past ~50,000 years with typical precision of ±50–100 years.