Journal :   Asian Journal of Research in Chemistry

Volume No. :   5

Issue No. :  2

Year :  2012

Pages :   183-186

ISSN Print :  0974-4169

ISSN Online :  0974-4150


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Indirect Spectrophotometric Determination of Formaldehyde with Sulphur Dioxide in Air Samples using p-Aminobenzene Sulphonic Acid


Prasanna K. Sharma, Surendra K. Rajput

sharma.prasanna@rediffmail.com

Address:   Prasanna K. Sharma*and Surendra K. Rajput
Department of Chemistry and Biochemistry, Govt. Nagarjuna P.G. College of Science, Raipur, 492010 (C.G.), India.
*Corresponding Author
DOI No:

ABSTRACT:
An indirect determination of formaldehyde in air samples is described. The method is based on colour reaction of formaldehyde, p-amino benzene sulphonic acid and sulphur dioxide in hydrochloric acid medium. The absorbance of pinkish-red coloured dye formed is measured at 510 nm. The colour system obeys Beer’s law in the range of 1.8 to 9.6 µg of formaldehyde per 25 ml (0.072 – 0.38 ppm). Optimum conditions for colored development, and possible interferences, have been studied. The method is simple, sensitive and cost effective and have been used for the determination of formaldehyde in varies environmental samples.
KEYWORDS:
Absorbance, Formaldehyde, p-Amino benzene sulphonic acid, Environmental samples. Interference.
Cite:
Prasanna K. Sharma, Surendra K. Rajput. Indirect Spectrophotometric Determination of Formaldehyde with Sulphur Dioxide in Air Samples using p-Aminobenzene Sulphonic Acid. Asian J. Research Chem. 5(2): February 2012; Page 183-186.
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