Inter-laboratory comparison of SiO2 analysis for geothermal water chemistry

► Prediction of geothermal reservoir temperature and silica deposition. ► Colorimetry, AAS and ICP as analytical techniques for SiO2 in geothermal waters. ► Propagation of analytical uncertainty in predicting geological processes. ► Revised analytical procedure for SiO2 analysis in geothermal waters. ► Fundamental cause for dispersion in the SiO2 analyses is equipment calibration.