Spectrophotometric Determination of Nitrite Based on Its Reaction with p-Nitroaniline in the Presence of Diphenylamine in Micellar Media

Afkhami, Abbas; Masahi, Shokofeh; Bahram, Morteza

doi:10.5012/bkcs.2004.25.7.1009

Cited by 25 publications

(2 citation statements)

References 19 publications

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“…Nitrite is widely found in the environment, agricultural runoffs from the denitrification and nitrification processes in soil containing nitrogenous fertilizers [1], the wastewater streams from dye manufacturing [2], and a preservative in food products [3]. In food products, nitrite is used as food additives to inhibit the growth of Clostridium botulinum in processed meat [3].…”

Section: Statement Of the Problemmentioning

confidence: 99%

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Detection of nitrite by thread-based and paper-based devices by modified griess reagent

Singhaphan

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New thread-based and paper-based devices for the determination of nitrite ions based on modified Griess reagent were developed. The surface of the materials was chemically modified with p-aminobenzoyl moiety and chromotropic acid was used as a coupling reagent. The functionalization of the materials was confirmed by Raman spectroscopy. By using the thread-based device, the detection of nitrite was achieved by measuring the color band length. The optimum concentration of chromotropic acid was 5 mM in 0.10 M sulfuric acid mixed with 0.2 M citric acid. The working range was from 50 to 1,000 ?M with a sample volume of 15 ?L, where the lowest concentration that produced observable color on the thread was 25 ?M. The recoveries using the spiked samples were in the range of 92.4 115.4 %. By using the paper-based device, the detection of nitrite was achieved by measuring the color intensity. The optimum concentration of citric acid and chromotropic acid was 0.20 M and 100 ?M, respectively with 15-minute extraction. The working range was from 0.5 to 20 ?M with a sample volume of 3.00 mL, where LOD and LOQ were 0.44 ?M and 1.47 ?M, respectively. The recoveries using the spike samples were in the range of 81.3 103.5 %. When the results of the sample analysis by the proposed methods were compared to those by the ion chromatography method, it was found that the recoveries and RSD of the results obtained from the proposed methods were in acceptable ranges.

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Section: Statement Of the Problemmentioning

confidence: 99%

“…Nitrite is widely used throughout chemical [2], food [3], pharmaceutical industries [20]. In the environment, nitrite is a general intermediate in the nitrogen cycle [21].…”

Section: Chapter II Theory and Literature Review 21 Nitritementioning

confidence: 99%

Detection of nitrite by thread-based and paper-based devices by modified griess reagent

Singhaphan

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Kinetic Determination of Trace Amounts of Nitrite Using an Optical Chemical Sensor

Afkhami

Madrakian

Aleseyyed

2012

CLEAN Soil Air Water

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An optical chemical sensor (optode) is proposed for the kinetic determination of nitrite ion. The optode was fabricated by the immobilization of methyl violet on a triacetylcellulose polymeric membrane. Methyl violet is covalently bonded to a transparent triacetylcellulose film. By immersion of the sensor into an acidic nitrite solution, the absorbance of the sensor at 596 nm decreases with time that is due to the reaction of nitrite with the immobilized methyl violet. A fixed time method of 15 min was used to monitor the reaction. The linear range for the determination of nitrite was 0.20–8.00 µg mL−1 and the limit of detection was 0.08 µg mL−1. The optodes were one‐shot, they had durability more than 2 months and were easily prepared. The optode was successfully applied to the determination of nitrite ion in spring water and sewage samples.

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Analytical Chemistry Optical Chemosensor for Spectrophotometric Determination of Nitrite in Wastewater

Abou‐Melha

2020

ChemistrySelect

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An easy, sensitive, and rapid spectrophotometric method has been documented for determining nitrite (NO 2 À ) in water and wastewater. To detect and adsorb harmful nitrite ions from wastewater efficiently; a stable optical nanosensor was manufactured by immobilization of 1-Naphthylamine (1-NA) over mesoporous silica nanospheres (MSNs). The determination of nitrite was based on the reaction of nitrite with the optical sensor (1-NA chemosensor) and forming diazonium salt which was subsequently coupled with N-(1-Naphthyl) ethylenediamine dihydrochloride (NED) to form a stable brownish azo dye. The dye shows an absorption maximum at 457 nm. The optimal conditions for the reaction and the analytical parameters were evaluated. The method has been designed by controlling the acidity, the quantity of reagents required and the amount of tolerance of certain ions. The range of linearity was found to be 0.108-10.8 μM of nitrite. The nitrite identification detection limit and quantitation limit are 0.106 μM and 0.353 μM, respectively. The performance of the chemosensor in extracting the NO 2 À ions was tested. According to the Langmuir isotherms, the adsorption pattern was highly competent, where the removal capacity for NO 2 À ion was 156.0 mg/g by the chemosensor. Some cations and anions have been identified as the competing ions; these ions were not affected on the NO 2 À ion in both detection and adsorption processes.[a] Prof.

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Spectrophotometric Determination of Nitrite Based on Its Reaction with p-Nitroaniline in the Presence of Diphenylamine in Micellar Media

Cited by 25 publications

References 19 publications

Detection of nitrite by thread-based and paper-based devices by modified griess reagent

Detection of nitrite by thread-based and paper-based devices by modified griess reagent

Kinetic Determination of Trace Amounts of Nitrite Using an Optical Chemical Sensor

Analytical Chemistry Optical Chemosensor for Spectrophotometric Determination of Nitrite in Wastewater

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