The present work reports a kinetic spectrophotometric method for the determination of trace amounts of sulphite that is based on inhibitory effect of sulphite on the oxidation of Methylene blue (MB) in acidic media. The reaction is followed spectrophotometrically by monitoring the decrease in absorbance of MB at 664 nm with a fixed time of 0.5-4.5 minutes. It was found that sulphite exert a strong inhibitory effect on this reaction. The method is applicable in the range of 0.05-120 mg L-1 sulphite and the lower limit of detection is 0.04 mg L-1 (3o). The relative standard deviation for 6 replicated determinations was 0.9 and 0.5 % for 4.0 and 20.0 mg L-1, receptively. This method was successfully applied for the determination of sulphite in real samples.
Mohammad Dehqan, A., Shishehbore, M. R., & Nasirizadeh, N. (2008). Kinetic Spectrophotometric Method for Determination of S032- Using Methylen blue. Journal of Physical & Theoretical Chemistry, 5(1), 15-20.
MLA
A. Mohammad Dehqan; M. Reza Shishehbore; N. Nasirizadeh. "Kinetic Spectrophotometric Method for Determination of S032- Using Methylen blue". Journal of Physical & Theoretical Chemistry, 5, 1, 2008, 15-20.
HARVARD
Mohammad Dehqan, A., Shishehbore, M. R., Nasirizadeh, N. (2008). 'Kinetic Spectrophotometric Method for Determination of S032- Using Methylen blue', Journal of Physical & Theoretical Chemistry, 5(1), pp. 15-20.
VANCOUVER
Mohammad Dehqan, A., Shishehbore, M. R., Nasirizadeh, N. Kinetic Spectrophotometric Method for Determination of S032- Using Methylen blue. Journal of Physical & Theoretical Chemistry, 2008; 5(1): 15-20.
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