Differential pulse polarographic determination of nitrate and nitrite

Abstract

A differential pulse polarographic method for the determination of nitrate and nitrite was based upon the enhancement of the ytterbium peak current by both nitrate and nitrite. A detection limit of 14 ppb nitrate or nitrite nitrogen was achieved under ideal conditions. The method was adapted to the analysis of soils and natural waters following interference removal. A relative precision of less than 4% was routinely achieved for analysis of soil samples containing 10 ppm or more nitrate nitrogen. Simultaneous determination of both nitrate and nitrite was possible under certain conditions. Results obtained by this method were compared to results obtained by the nitrate ion-selective electrode method and the phenoldisulfonic acid spectrophotometric method.

Electrochemical properties and electrocatalytic activity of FAD immobilized onto cobalt oxide nanoparticles: Application to nitrite detection

“…Furthermore, in the body nitric oxide is an important messenger in cellular communications [6], immune regulation [7] and neurotransmission [8]. In addition nitrite ions occur naturally in water and soil and are involved in the nitrogen cycle [9] and it is added during the meat curing process because of its ability to preserve food through the inhibition of the growth of Clostridium boutalinum bacteria and gives the meat its characteristic colour and flavour [10].…”

Electrocatalytic oxidation of nitrite at an aluminum electrode modified by a chemically deposited palladium pentacyanonitrosylferrate film

“…They involve the catalytic reduction of nitrite in the presence of some polyvalent metal ions, such as molybdate [8,9], ytterbium (III) [10] and chromium [11]. All of these methods suffer from poor sensitivity and are subject to interference from nitrate.…”

The Detection of Nitrate Using in-situ Copper Nanoparticle Deposition at a Boron Doped Diamond Electrode

“…2 It is also limited by common interferences such as chloride and nitrite ions. 1,12 Therefore research into different methods for the detection of nitrate is increasingly important.…”

“…Polarography is often employed 1,3,28,29 and this and other electrochemical methods are used in conjunction with other regimes such as high performance liquid chromatography. 4,[6][7][8][30][31][32] Electrochemical detection is mostly performed at copper modified electrodes [33][34][35][36][37][38][39][40][41][42][43][44][45][46] although other electrodes such as Pt modified with cellulose acetate membrane, 47 gold plated porous membrane, 48 yeast modified glassy carbon 49 and yeast modified screen printed carbon 49 have been investigated.…”

“…Ion selective electrodes can be used to avoid the effects of common interferences. 1,2,5,11,12,35,[50][51][52][53][54][55][56][57][58][59][60][61][62][63] Some limits of detection using electrochemical methods are shown in Table 1.…”