Does Hach have an ultra low range methods for total or reactive phosphorus?
Ultra low range methods for total or reactive phosphorus
Application note Lit 2097 details a procedure that can be used for ultra low range total and reactive phosphorus. The concentration range for this procedure is 10 to 500 µg/L PO4-P and has a method detection limit (MDL) of 5.35 µg/L PO4-P for total phosphorous and 4.95 µg/L PO4-P for reactive phosphorus. This procedure requires Phosphorus (Reactive and Total) TNTplus Vial Test (Product # TNT843), Sample cell, 50 mm rectangular PMMA (Product # LZP341), and a DRB200 Digital Reactor Block for TNTplus with 13 mm vial wells.