
Dissolved organic matter compositions in 0.6-3.4â¯km deep fracture waters, Kaapvaal Craton, South Africa
Keywords: Groundwater; Dissolved organic matter; Proteins; Carboxyls; Aromatics; Aliphatics; UV-vis spectrophotometry; Fluorescence; Solid state NMR; Negative electrospray ion Fourier transform ion cyclotron resonance-mass spectrometry; ESI-FTICR-MS; electrospray