Table 1 Collection methods, storage protocols, laboratory processing, and analytes by sample type.
Sample type | Collection | Storage Method | Additional preparation for storage or analysis | Analyses performed |
|---|---|---|---|---|
Soil & Sediment | Intact cores (soils only) | 4 °C | — | Bulk density, water retention curves, particle size analysis |
Grab samples | −20 °C | Lyophilize, sieve | Total carbon, total nitrogen, soil pH and conductivity, poorly crystalline iron | |
4 °C | Sub-sample in anoxic environment | X-ray absorption spectroscopy | ||
— | Gravimetric water content | |||
Water | Unfiltered grab samples | 4 °C | — | Water quality (pH, ORP, alkalinity, conductivity) |
Filter in lab with GFF and then 0.2µm PES, filtrate run through solid phase extraction, extract stored at −80 °C | High-resolution mass spectrometry | |||
GFF filter dried at 45 °C, then stored at room temperature in desiccator | Total suspended solids | |||
Filtered grab samples | −20 °C | — | Common dissolved anions and cations | |
4 °C | — | Dissolved organic carbon, total dissolved nitrogen, colored dissolved organic matter absorbance and fluorescence, water isotopes |
