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Our current analyses are dissolved free amino acids (DFAA); protein (as total hydrolyzable amino acids by HPLC) in seawater, particulate material, sediment, and biological material; C:37 alkenones; biogenic opal in particulate material and sediment; phytoplankton nutrients (nitrate, nitrite, silicate, phosphate, ammonia); photosynthetic pigments and derivatives; proteins in biological material using the Coomassie Blue assay (manual by Bio-Rad).  We are currently purifying chlorins for N isotope analysis from particles and sediments, and implementing the technique for analyzing low-molecular weight organic acids (Alberts and Martens 1997). Facilities in my lab include 2 HPLC's (one with a photodiode array UV-VIS detector, dedicated to the extraction and purification of chlorins for isotopic analysis), another HPLC equipped with a fluorescence detector and robotic autosampler mainly used for amino acid and amine determination, a Gas Chromatograph with FID detector, a Gas Chromatograph with both Mass Selective Detector and FID, and a UV-VIS spectrophotometer with a robotic autosampler for analyses of biogenic and lithogenic opal, dissolved inorganic nutrients, protein (using the Coomassie Blue assay), and dissolved organic nitrogen (DON). Other instruments are a refrigerated centrifuge, and a Milli-Q water system, and extensive minor analytical and preparatory equipment. Field research is supported by our expandable (2-6m) sediment gravity corer, drifting sediment traps and oceanographic bottles.