Spectrophotometric determination of nitrite by the formation of bisazo dye
Gayathri, N; Balasubramanian, N
| HERO ID | 1681893 |
|---|---|
| In Press | No |
| Year | 2001 |
| Title | Spectrophotometric determination of nitrite by the formation of bisazo dye |
| Authors | Gayathri, N; Balasubramanian, N |
| Journal | Indian Journal of Chemistry. Section A |
| Volume | 40 |
| Issue | 6 |
| Page Numbers | 656-658 |
| Abstract | A sensitive spectrophotometric method for the determination of nitrogen dioxide in air, nitrate and nitrite in water, soil, radiator coolant and some analytical grade chemicals is described. The method is based on diazo coupling reaction, where 4-amino azobenzene: is treated with nitrite under acidic condition in the presence of bromide ion and the formed diazonium salt couples with resorcinol in acid medium. The formed bisazo dye has an absorption maxims at 550 nm under alkaline condition and obeys Beer's law over the range 0-16 mug of nitrite in overall aqueous volume of 25 mL. The system obeys Beer's law over the range 0-3 mug nitrite, when extracted into toluene under ammoniacal condition (pH 9.0 +/- 0.5) and stripped to aqueous phase with 5 mt of 0.35 molar NaOH. The molar absorptivity of the colour system is 4.8 x 10(4) L. moL(-1). cm(-1). |
| Wosid | WOS:000169423600024 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Source: Web of Science WOS:000169423600024 |
| Is Public | Yes |