Flow-injection biamperometric determination of nitrate (by photoreduction) and nitrite with the NO−2/I− reaction

Torró, Iolanda; Mateo, J. V. García; Calatayud, J. Martı́nez

doi:10.1016/s0003-2670(98)00109-3

Cited by 28 publications

(10 citation statements)

References 25 publications

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“…The effect of an activator for nitrate reduction was carried out by using EDTA. Agreement with other reports was observed [26][27][28] . The intensity was dramatically improved in the adding of activator.…”

Section: Resultssupporting

confidence: 93%

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Utilization of Microfluidic Device for Determination of Nitrite and Nitrate in Water and Soil Samples

Laitip¹,

Chomnawang²,

Youngvises³

et al. 2013

Asian J. Chem.

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Nitrate and nitrite species are naturally occur in typically environment and are part of the nitrogen cycle. They represent wide spread contaminants in the environment and important serve to evaluate quality of natural water 1 . Naturally occurring nitrate levels in surface and ground waters are generally a few mg/L. In many ground waters, an increase of nitrate levels has been observed due to the excess application of nitrogen fertilizers of farming practice 2 . In some countries, up to 10 % of the pollution may be exposed to nitrate levels in drinking water of above 50 mg/L. As recently found in 2007, the Greenpeace Research Group has reported the nitrate levels found in agricultural areas in Thailand. Drinking water from 30 % of all groundwater wells in investigated areas showed high content of nitrates which are 3 times above the World Heath Organization (WHO) safety limit of 50 mg/L of nitrate. This nitrate pollution was highest in the most intensive crops, in asparagus farms in Kanchanaburi 3 . High levels of nitrate

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Section: Resultssupporting

confidence: 93%

“…The reported maximum yield of nitrate photo-reduction was achieved in the alkaline region 26,28 . Therefore, pH of nitrate solution was investigated in the range 7-12.…”

Section: Resultsmentioning

confidence: 99%

Utilization of Microfluidic Device for Determination of Nitrite and Nitrate in Water and Soil Samples

Laitip¹,

Chomnawang²,

Youngvises³

et al. 2013

Asian J. Chem.

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“…Only nitrite and nitrate, which are photoactive (Mikuska and Vecera 2002;Gil-Torró, García-Mateo, and Martínez-Calatayud 1998), among the anions studied were found to interfere with the determination. Among the cations, Cu 2þ posed the most severe interference, as it provided a chemiluminescent response under the operating conditions used.…”

Section: Analytical Figures Of Meritmentioning

confidence: 92%

A Fully Automated Assembly Using Solenoid Valves for the Photodegradation and Chemiluminometric Determination of the Herbicide Chlorsulfuron

2005

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This paper presents a new photochemiluminescent system for the determination of chlorsulfuron in water samples. The light from a low-pressure mercury lamp is used as a clean, reproducible, and inexpensive "reagent" for the derivation of the pesticide, performed in glycine buffer at pH 9.5. Then, the photo-products from irradiation are oxidized by permanganate in sulfuric acid solution. The oxidation reaction was favored by using high temperatures. A comparative study and discussion about the use of polyphosphoric acid instead of sulfuric acid in the oxidation reaction is also presented.The use of solenoid valves allows for the easy, complete automation of the process with low sample and reagent consumption. The calibration graph was linear over the range 0.1-1.3 mg L 21 of chlorsulfuron, the limit of detection was 0.06 mg L 21 , and the throughput was 25 h 21 . The proposed method was applied to the determination of the pesticide in spiked mineral water samples.

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“…The application of this system to the analysis of iron in pharmaceutical samples was carried out, and the results are in agreement with those from the Association of Official Analytical Chemists. [ 20 ]…”

Section: Strategies Based On the Reagents’ Managementmentioning

confidence: 99%

Strategies to Make Methods Based on Flow Injection Analysis Greener

Bezerra

Santelli

Lemos

et al. 2020

CLEAN Soil Air Water

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The implementation of flow injection analysis (FIA) systems and correlated techniques in the laboratory routine provides an increase of analytical throughput and the reduction of risks of analyte losses and contamination. Naturally, it contributes to the reduction of reagent consumption and minimization of waste generation. This paper presents and discusses an overview of the main strategies adopted to make methods based on FIA systems more environmentally friendly, and offers a review of these methods that covers the period from January 2002 to December 2019. Strategies based on reagent management (adoption of procedures without reagents, replacement of toxic reagents, recycling and reuse of reagents and, use of immobilized reagents), the online waste treatment, and the improvements of FIA systems (flow system configurations that avoid reagent wastage, use of green detectors, automation, and miniaturization) are approached in this perspective.

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Flow-injection biamperometric determination of nitrate (by photoreduction) and nitrite with the NO−2/I− reaction

Cited by 28 publications

References 25 publications

Utilization of Microfluidic Device for Determination of Nitrite and Nitrate in Water and Soil Samples

Utilization of Microfluidic Device for Determination of Nitrite and Nitrate in Water and Soil Samples

A Fully Automated Assembly Using Solenoid Valves for the Photodegradation and Chemiluminometric Determination of the Herbicide Chlorsulfuron

Strategies to Make Methods Based on Flow Injection Analysis Greener

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