Nitrate Reagent Set, Powder Pillows, 0,01 - 0,50 mg/L NO3-N

Description

Reagent Set Powder Pillows reagents (2429800) for the determination of Nitrate from Hach.

Аpplication: For water, wastewater and seawater.

Set contains: NitraVer 6 Powder Pillows (2107249), NitraVer 3 Powder Pillows (2107169).

The reagents are hermetically sealed in foil sachets, which provides them with a long shelf life. The reagent is simply poured into the measuring cuvette along with the sample. The analysis is carried out visually, for example using a color disc or with a HACH LANGE photometer.

Summary of method: Cadmium metal reduces nitrate in the sample to nitrite. The nitrite ion reacts in an acidic medium with sulfanilic acid to form an intermediate diazonium salt. The salt couples with chromotropic acid to form a pink-colored product. The measurement wavelength is 507 nm for spectrophotometers or 520 nm for colorimeters.