Phosphate (total and ortho), TNT, 0,06 - 3,5 mg/L PO4

Description

Cuvette tests TNT 2742745 for the determination of Phosphate (total and ortho) from Hach.

Аpplication: For water, wastewater and seawater.

Cuvette test (Ø 16 mm) completely equipped with all reagents, optimised for reliable measuring results and easy handling. Sealed ampoules of 16 mm contain everything you need for mixing and measuring. The package contains all the necessary reagents and ampoules.

Special remarks: 16 mm TNT products can be evaluated on DR900 only.

Set contains: Cuvette test tubes, Sodium Hydroxide, 1.0 N (104542), Potassium Persulfate Powder Pillows (2084766), PhosVer 3 Powder Pillows (2106046)

Summary of method: Phosphates in condensed inorganic forms (meta-, pyro-, or other polyphosphates) are converted to reactive orthophosphate before measurement. The sample is pretreated with acid and heat to hydrolyze the condensed inorganic forms to orthophosphate. Orthophosphate reacts with molybdate in an acid medium to produce a mixed phosphate/molybdate complex. Ascorbic acid then reduces the complex, which gives an intense molybdenum blue color. The measurement wavelength is 880 nm (DR 1900:710 nm) for spectrophotometers or 610 nm for colorimeters.