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Asian Journal of Research in Chemistry
ISSN: 0974-4150(Online), 0974-4169(Print)
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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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