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2004•Journal of Analytical ScienceRequires access

The Determination of Trace Nitrite by UV-Vis Spectrophotometry

Huayu Zhu

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Abstract

A new method for the determination of nitrite ion is proposed by two-wavelength UV-Vis spectrophotometry. This method is based on the diazotization-coupling reaction of saforian O with nitrite ion in H_2SO_4 medium can result in a sensitive absorption at 518 nm and 348 nm. The linear range is 0～6.0/μg/10mL for nitrite and the apparent molar absorptivites is 6.2×10~4·L·mol~(-1)·cm~(-1). The method has been applied to the determination of nitrite in vegetables and water with satisfactory results.

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What this paper is about

A new method for the determination of nitrite ion is proposed by two-wavelength UV-Vis spectrophotometry. This method is based on the diazotization-coupling reaction of saforian O with nitrite ion in H_2SO_4 medium can result in a sensitive absorption at 518 nm and 348 nm. The linear range is 0～6.0/μg/10mL for nitrite and the apparent molar absorptivites is 6.2×10~4·L·mol~(-1)·cm~(-1). The method has been applied to the determination of nitrite in vegetables and water with satisfactory results.

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Available abstract

A new method for the determination of nitrite ion is proposed by two-wavelength UV-Vis spectrophotometry. This method is based on the diazotization-coupling reaction of saforian O with nitrite ion in H_2SO_4 medium can result in a sensitive absorption at 518 nm and 348 nm. The linear range is 0～6.0/μg/10mL for nitrite and the apparent molar absorptivites is 6.2×10~4·L·mol~(-1)·cm~(-1). The method has been applied to the determination of nitrite in vegetables and water with satisfactory results.

Key concepts: Chemistry, Nitrite, Spectrophotometry, Ion, Absorption (acoustics), Trace Amounts, Linear range, Ultraviolet visible spectroscopy

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