Spectrophotometric Determination of Trace Amount of Nitrite in Water and Soil

Authors

  • Sanjeela Shakya Department of Chemistry, Tri-Chandra Campus, TU, Kathmandu, Nepal
  • Deepa D.C. Department of Chemistry, Tri-Chandra Campus, TU, Kathmandu, Nepal
  • Rajib Chaudhary Department of Chemistry, Tri-Chandra Campus, TU, Kathmandu, Nepal
  • Surendra K. Gautam Department of Chemistry, Tri-Chandra Campus, TU, Kathmandu, Nepal

DOI:

https://doi.org/10.3126/acadview.v9i1.71252

Keywords:

1-aphthol, Molar Absorptivity, Nitrite, p-nitroaniline, λmax

Abstract

A simple, sensitive, rapid and economical spectrophotometric method for the determination of trace amount of nitrite present in the water and soil samples is investigated. This method is based on the diazo-coupling reaction where nitrite reacts with p-nitroaniline in presence of hydrochloric acid to form diazonium cation which is subsequently coupled with 1-naphthol in presence of sodium hydroxide to form a stable azo-dye. The absorption maximum (λmax) for azo-dye is found to be 610 nm and the method obeys Beer-Lambert’s law at this analytical wavelength over the concentration range 0.02-0.12 μg/mL of nitrite. The molar absorptivity is found to be 3.29 x 104 liter.mol-1cm-1.

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Published

2023-12-31

How to Cite

Shakya, S., D.C., D., Chaudhary, R., & Gautam, S. K. (2023). Spectrophotometric Determination of Trace Amount of Nitrite in Water and Soil. Academic View, Journal of TUTA Tri-Chandra Campus Unit, 9(1), 136–142. https://doi.org/10.3126/acadview.v9i1.71252

Issue

Vol. 9 (2023)

Section

Articles