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Spectrophotometric determination of nitrite using new coupling agents

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Field Value
 
Title Spectrophotometric determination of nitrite using new coupling agents
 
Creator Veena, K
Narayana, B
 
Subject Spectrophotometry
Diazotization
Nitrite
Frusemide
5-methyl-4-{[(1E)-phenylmethylene] amino}-2, 4-dihydro-3H-1,2, 4-triazole-3-thione
 
Description 89-92
A method is described for the spectrophotometric determination of nitrite. It is based on the reaction of nitrite with p-nitroaniline (PNA) in acid medium to form diazonium ion, which is coupled with frusemide (FRU) or 5-methyl-4-{[(1E)-phenylmethylene]amino}-2,4-dihydro-3H-1,2,4-triazole-3-thione (MPAT) in basic medium to form azo dyes, showing absorption maxima at 680 or 395 nm respectively. The range of linearity for PNA-MPAT and PNA-FRU system are 0.4-2.0 μg/mL,
0.02-0.6 μg/mL of nitrite respectively. Molar absorptivity, Sandell sensitivity, Detection limit, Quantitation limit for PNA-MPAT and PNA-FRU system were found to be 3.314 × 10³ Lmol⁻¹cm⁻¹, 0.014 μg cm⁻², 0.559 μg mL⁻¹, 1.695 μg mL-1and 1.46 × 10³
Lmol⁻¹cm⁻¹, 0.032 μg cm⁻², 0.485 μg mL⁻¹, 1.470 μg mL⁻¹ respectively. The method has been applied to various water samples, soil samples and tablets.
 
Date 2009-02-19T11:03:51Z
2009-02-19T11:03:51Z
2009-01
 
Type Article
 
Identifier 0971–457X
http://hdl.handle.net/123456789/3216
 
Language en_US
 
Publisher CSIR
 
Source IJCT Vol.16(1) [January 2009]