M. Barzegar et al., Kinetic spectrophotometric determination of trace amounts of nitrite by its reaction with molybdosilicic acid blue, MICROCHEM J, 65(2), 2000, pp. 159-163
A new kinetic spectrophotometric method was developed to determine nitrite
using molybdosilicic acid blue (MSAB) as a color reagent. This method is si
mple, rapid, sensitive and selective for the determination of trace amounts
of nitrite ion. The reaction was monitored spectrophotometrically by measu
ring the decrease in absorbance of the reaction mixture at lambda(max) = 81
0 nm. The fixed time method was used. The limit of detection was 0.004 ppm.
The relative standard deviations for the determination of 0.06 and 0.30 pp
m of nitrite were 3.0% (n = 6) and 1.3% (n = 10), respectively. Two linear
calibration graphs were observed (0.02-0.1 and 0.1-1.0 ppm). The method was
applied to the determination of nitrite in well and waste waters. (C) 2000
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