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Table T3. Analytical methods and precisions for interstitial water geochemical measurements.

Parameter Precision
(%)
Method
Cl 0.1 Titration with AgNO3
SO42– 2.3 Ion chromatography
NH4+ 1.7 Spectrophotometer
Na+ 3.1 ICP-AES
K+ 10.8 ICP-AES
Mg2+ 8.8 ICP-AES
Ca2+ 6.2 ICP-AES
Li+ 2.6 ICP-AES
Sr2+ 3.6 ICP-AES
Ba2+ 15.8 ICP-AES
Mn2+ 2.8 ICP-AES
Fe2+ 4.5 ICP-AES
H3BO3 4.8 ICP-AES
H4SiO4 5 ICP-AES

Note: ICP-AES = inductively coupled plasma–atomic emission spectroscopy.

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