Protocols

Systematic collection of groundwater samples at regular depth intervals using sediment coring and peristaltic pumping, with immediate field analysis and laboratory chemical characterization. Targets t...

Comprehensive chemical analysis of water samples including major ions, trace metals, and conservative tracers using multiple analytical techniques. Includes field measurements and laboratory analyses ...

Quantitative XRD analysis of powdered rock samples using Rietveld refinement to determine mineral concentrations and spatial distribution. Samples analyzed under multiple conditions including ethylene...

Standardized wet sieving method using Yoder device to determine soil aggregate size distributions. Measures water-stable aggregates across multiple size classes to assess soil structure.

High-resolution mass spectrometry analysis using Fourier Transform Ion Cyclotron Resonance to characterize the molecular composition of organic matter in different chemical extractions.

Standard gravimetric determination of soil moisture content using oven-drying method at 100°C for 24 hours with 2mm sieving to remove rocks and organic debris.

Measurement of oxygen consumption rates in pore water samples using resazurin as an indicator dye. Samples preserved at 4°C for 24 hours before spectrofluorometric analysis to determine aerobic respir...

Standard analytical chemistry methods using ion chromatography for anions and inductively coupled plasma mass spectrometry for cations and trace elements in filtered water samples.

Colorimetric determination of ferrous iron concentrations using ferrozine reagent with spectrophotometric measurement at 562 nm absorption peak and calibration curve from standard solutions.

Stepped-temperature thermal analysis to quantify readily oxidizable organic carbon (OC400), total inorganic carbon (TIC), and residual organic carbon (ROC) fractions with different thermal stabilities...

Dissolved sulfide concentration determined by reacting H2S with N,N-dimethyl-p-phenylene diamine under acidic conditions to form methylene blue.

Sample pre-treatment method using PPL cartridges (Bond Elut) after acidifying samples to pH 2 with phosphoric acid to extract organic compounds.

Samples filtered through 0.22 μm Sterivex filters with housings made of Eastar co-polyester.