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The Targeted In Situ Geochemistry Enhanced Radiochemistry Research (TIGERR) mobile laboratory enable on-site sampling and processing of redox-sensitive samples. On-site sample analysis minimizes changes in the chemical speciation of redox-sensitive samples during shipping and further processing. The mobile lab is designed to properly process and analyze sediment and water samples in one unit. A wide range of accessories would make the mobile lab independent and self-sufficient. A microelectrode coupled with a micro-profiling system will enable the rapid, on-site measurement of dissolved species and other chemical parameters (O2, H2, H2S, N2S, NO, pH, redox, electric potential, temperature) in sediments and soils. A portable Radioisotope counter will be used to analyze stable isotopes and radioisotopes in solid and water. A portable X-ray fluorescence (XRF) spectrometer will be used for quick, in situ elemental analysis, a portable Uv-Vis spectrophotometer will be used for in situ speciation analysis of metals and metalloids, and a liquid nitrogen dewar will be used for instant freezing and preservation of samples. The mobile laboratory will also be equipped with other essential equipment (pH/EH meter, balance, core slicer, anoxic glove box, sets of sieves, and an incubator).