- 作者: --
- 作者服務機構: Department of Chemistry, Malek-ashtar University of Technology (MUT), Shahinshahr, P. O. Box 83145/115, I. R. Iran
- 中文摘要: A kinetic spectrophotometric method for determination of trace nitrite in two dynamic ranges (2-100 and 100-500 ng/mL) based on its catalytic effect on the reaction between methylthymol blue and potassium bromate in acidic (sulfuric acid) media is described. The reaction was monitored spectrophotometrically by measuring the decreasing color of methylthymol blue at 437 nm by the fixed-time method of 4.0 min at 30 °C. The detection limit is 0.6 ng/mL, and the relative standard deviations for 50.0 and 250.0 ng/mL nitrite are 1.6% and 1.3%, respectively. The method was used for the determination of nitrite in water samples.
- 英文摘要: --
- 中文關鍵字: Nitrite; Kinetic-catalytic; Methylthymol blue; Spectrophotometry.
- 英文關鍵字: --