Formation kinetics of the pink azo dye in the determination of nitrite in natural waters

Mapping anthropogenic nitrogen through point sources in coral reefs using δ15N in macroalgae

“…In the laboratory, each water sample was filtered through precombusted (at 450°C for 4 h) Whatman GF/F filters. Dissolved inorganic nitrogen (DIN: NH 4 + +NO 3 -+NO 2 -) and DIP were determined colorimetrically (Strickland & Parsons 1972) with a flow injection analysis method (Pai & Yang 1990). DON concentrations data were derived from Chen et al (2004).…”

Influence of intermediate water in the western Okinawa Trough by the outflow from the South China Sea

“…Dissolved oxygen (DO) was measured by the Winkler method. Nitrate was measured by a flow injection analyzer [Pai et al, 1990a]. Phosphate was measured by the molybdenum blue method [Pai et al, 1990b].…”

Influences of cyclones on chlorophyll a concentration and Synechococcus abundance in a subtropical western Pacific coastal ecosystem

“…The nutrient samples were quickly frozen in liquid N2 and then stored at -15°C until analysis. The concentrations of nitrate and nitrite were determined by the pink azo dye method (Parsons et al 1984, Pai et al 1990). Phosphate and silicate were measured by the molybdenum blue and the silicomolybdenum blue method (Pai et al 1990).…”

“…The concentrations of nitrate and nitrite were determined by the pink azo dye method (Parsons et al 1984, Pai et al 1990). Phosphate and silicate were measured by the molybdenum blue and the silicomolybdenum blue method (Pai et al 1990). Salinity samples collected from the coastal station were analyzed by an Autosal salinometer (model 8400B.…”