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Abstract

Spectrophotometric Methods For The Determination Of Iodate In Iodized Edible Salt And Periodate In Water Samples

Author(s): Akheel Ahmed Syed, Rangaiah Sunitha

N-1-Napthylethylenediamine dihydrochloride (NEDA) is proposed as new sensitive spectrophotometric reagent for the determination of iodate and periodate in the presence of 3-methyl-2-benzothiazoline hydrazono hydrochloride hydrate (MBTH) as electrophilic coupling reagent. The reaction was carried out in mild acid medium. The blue color formed indicated maximum absorbance at 590 nm for iodate and 580 nm for periodate. The methods obeyed Beer’s law. The color developed was stable up to 24h at room temperature. The molar absorptivity and Sandell’s sensitivity were 3.2105, 1.7105 L mol-1 cm-1, 5.2610-3 and 1.6210-3 g cm-2 respectively. Interference was not observed with 10 cations and 8 anions. The methods showed good reproducibility and can be satisfactorily applied for the determination of iodate in iodized edible salt and periodate in water samples.


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Analytical Chemistry: An Indian Journal received 378 citations as per Google Scholar report

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