Journal of Analytical Science and Technology

Table 3 Age data for the multiple aliquots of basaltic rock using the modified protocol

From: Improvement of ⁴⁰Ar/³⁹Ar age determinations for Quaternary basaltic rocks by eliminating the peak suppression effect

	Previous protocol							Modified protocol
Sample ID	Ca/K	Cl/K	Mol ³⁹Ar (× 10⁻¹⁵)	%⁴⁰Ar*	Age (Ma)	± 1SD	sample ID	Ca/K	Cl/K	Mol ³⁹Ar (× 10⁻¹⁵)	%⁴⁰Ar*	Age (Ma)	± 1SD
564-01	2.833	− 0.032	0.042	6.2	0.24	0.07	642-01	2.974	− 0.028	0.036	9.0	0.34	0.04
564-02	2.481	0.119	0.029	101.7	3.07	0.03	642-02	3.033	− 0.046	0.036	4.5	0.19	0.04
564-03	2.632	0.021	0.029	101.5	3.67	0.03	642-03	2.956	− 0.034	0.037	3.9	0.15	0.04
564-04	2.217	− 0.011	0.030	27.4	1.37	0.17	642-04	3.045	− 0.013	0.039	5.6	0.17	0.05
564-05	2.245	− 0.084	0.030	9.9	0.36	0.12	642-05	3.048	− 0.073	0.035	3.0	0.11	0.04
564-06	2.197	− 0.008	0.028	20.8	0.82	0.17	642-06	2.739	0.023	0.066	6.9	0.21	0.03
564-07	2.581	0.013	0.031	3.9	0.14	0.09	642-07	5.791	0.475	0.003	6.3	0.59	0.36
564-08	2.343	− 0.045	0.031	18.8	0.73	0.12	642-08	2.822	0.007	0.074	4.2	0.17	0.03
564-09	2.121	− 0.023	0.030	12.2	0.47	0.16
564-10	2.448	0.015	0.034	14.3	0.54	0.12
564-11	2.301	− 0.012	0.031	15.2	0.55	0.13
			Weighted mean (Ka)		431					Weighted mean (Ka)		191
			± 1sd		20 (56.2%)					± 1sd		50 (27.5%)
			MSWD		8.00					MSWD		2.50

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