High-Precision In Situ ⁸⁷Sr/⁸⁶Sr Analyses through Microsampling on Solid Samples: Applications to Earth and Life Sciences

Table 4

(a) ⁸⁷Sr/⁸⁶Sr results obtained on microsamples of tooth dentine and enamel and bones of the Ursus spelaeus specimen. (b) ⁸⁷Sr/⁸⁶Sr soils sampled in the Grotta all’Onda cave from which the fossil remains were collected.

Sample	Type	Sr content (ppm)	^87Sr/^86Sr	2 SE	Log (Sr/Ca)
					Average
(a) Teeth and bones
STC1	Bone	510	0.708268	0.000006	−2.84
STC2	Bone	352	0.708441	0.000006	−2.98
STC3	Bone	359	0.708758	0.000006	−2.95
STC4-1	Enamel	187	0.708703	0.000005	−3.32
STC4-2	Dentin	360	0.708362	0.000006	−3.00
STC5-1	Enamel	211	0.708663	0.000005	−3.21
STC5-2	Dentin	384	0.708380	0.000006	−2.94
STC6-1	Enamel	179	0.709081	0.000005	−3.30
STC6-2	Dentin	339	0.708504	0.000006	−3.02
(b) Soils
STC7	Soil	204	0.708184	0.000006	−2.86
STC8	Soil	228	0.708155	0.000006	−2.86

2 SE: two standard error of the mean.