فهرس المقالات Bromate

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  1 - Kinetic Spectrophotometric Method for Determination of S032- Using Methylen blue
  A. Mohammad Dehqan M. Reza Shishehbore N. Nasirizadeh
  The present work reports a kinetic spectrophotometric method for the determination of traceamounts of sulphite that is based on inhibitory effect of sulphite on the oxidation of Methyleneblue (MB) in acidic media. The reaction is followed spectrophotometrically by monit أکثر

  The present work reports a kinetic spectrophotometric method for the determination of traceamounts of sulphite that is based on inhibitory effect of sulphite on the oxidation of Methyleneblue (MB) in acidic media. The reaction is followed spectrophotometrically by monitoring thedecrease in absorbance of MB at 664 nm with a fixed time of 0.5-4.5 minutes. It was found thatsulphite exert a strong inhibitory effect on this reaction. The method is applicable in the range of0.05-120 mg L-1 sulphite and the lower limit of detection is 0.04 mg L-1 (3o). The relativestandard 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 realsamples. تفاصيل المقالة
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  2 - Kinetic spectrophotometric determination of trace amounts of nitrite ion using potassium bromate-murexide mixture in acidic media
  M.S Tehrani A. Parchehbaf
  A new, simple, rapid, and cheap method for determination of trace amounts of nitrite ion is reported.Determination is based on reduction of bromate ion by nitrite ion, in the presence of murexide inacidic media. During reaction of bromate ion with nitrite ion, the react أکثر

  A new, simple, rapid, and cheap method for determination of trace amounts of nitrite ion is reported.Determination is based on reduction of bromate ion by nitrite ion, in the presence of murexide inacidic media. During reaction of bromate ion with nitrite ion, the reaction mixture is decolorized.The absorbance changes is then monitored spectrophotometricaly at 520 nm, at 25 °C. Dynamicrange of calibration curve for nitrite ion is in the range of 1-22 ig.mL 1 . The effect of interferingions was investigated. This method was successfully used for determinination of nitrite ionconcentration in sausages. تفاصيل المقالة