. 2015 Sep 27;29(21):1997–2006. doi: 10.1002/rcm.7312

Table 3.

Isotopic analysis (δ¹⁷O, δ¹⁸O and δ²H values) of hydration water of a gypsum standard (NEWGYP) and natural samples

Sample	CRDS (MCM ON)					CRDS (MCM OFF)					IRMS
Sample	δ¹⁷O (‰)	δ¹⁸O (‰)	δ²H (‰)	d‐excess (‰)	¹⁷O‐excess (per meg)	δ¹⁷O (‰)	δ¹⁸O (‰)	δ²H (‰)	d‐excess (‰)	¹⁷O‐excess (per meg)	δ¹⁷O (‰)	δ¹⁸O (‰)	¹⁷O‐excess (per meg)
BG‐10	−1.00 ± 0.02	−1.93 ± 0.02	−53.36 ± 0.21	−37.9 ± 0.2	20 ± 13	−0.89 ± 0.01	−1.78 ± 0.03	−52.90 ± 0.14	−38.6 ± 0.2	57 ± 11	−1.01 ± 0.02	−1.96 ± 0.04	25 ± 7
CRI‐01	−0.06 ± 0.02	−0.15 ± 0.04	−41.91 ± 0.23	−40.7 ± 0.2	15 ± 7	−0.04 ± 0.02	−0.16 ± 0.04	−42.3 ± 0.30	−42.9 ± 0.3	54 ± 12	0.09 ± 0.01	0.12 ± 0.01	27 ± 5
NEWGYP (n=36/8)^*	0.17 ± 0.07	0.30 ± 0.13	−51.03 ± 0.48	−53.4 ± 1.0	15 ± 8	0.12 ± 0.04	0.15 ± 0.05	−51.23 ± 0.35	−53.0 ± 0.6	42 ± 12	0.27 ± 0.07	0.49 ± 0.14	8 ± 4
SBL‐2.3	1.55 ± 0.01	2.92 ± 0.03	−27.71 ± 0.27	−51.6 ± 0.3	−7 ± 15	1.88 ± 0.02	3.40 ± 0.02	−27.47 ± 0.11	−54.7 ± 0.1	77 ± 13	1.85 ± 0.01	3.52 ± 0.02	−7 ± 1
SBL‐8	1.68 ± 0.02	3.13 ± 0.02	−27.72 ± 0.07	−53.2 ± 0.1	7 ± 15	1.74 ± 0.02	3.17 ± 0.02	−28.31 ± 0.07	−53.7 ± 0.2	61 ± 14	1.90 ± 0.01	3.60 ± 0.03	1 ± 5
PI 6A‐13H‐2 7–8 cm	4.46 ± 0.01	8.53 ± 0.02	3.76 ± 0.14	−64.5 ± 0.2	−26 ± 12	5.08 ± 0.04	9.41 ± 0.05	6.93 ± 0.20	−68.4 ± 0.4	123 ± 18	4.87 ± 0.00	9.30 ± 0.01	−30 ± 2
PI 6C‐7H‐2 25–26 cm	4.89 ± 0.03	9.30 ± 0.05	9.76 ± 0.26	−64.7 ± 0.3	−17 ± 9	5.32 ± 0.02	9.74 ± 0.02	11.21 ± 0.06	−66.8 ± 0.2	190 ± 7	4.98 ± 0.02	9.51 ± 0.03	−30 ± 2
Salina 1 (n=3)^*	5.61 ± 0.02	10.74 ± 0.03	13.21 ± 0.16	−72.7 ± 0.2	−48 ± 8	5.74 ± 0.04	10.74 ± 0.04	13.55 ± 0.18	−72.4 ± 0.4	72 ± 16	5.88 ± 0.03	11.26 ± 0.07	−49 ± 5

Samples analyzed in replicate (in these cases, the analytical error refers to the external precision, taking the average of the indicated number of samples).