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Solvent Stir Bar Microextraction Technique With Three-Hollow Fiber Configuration for Trace Determination of Nitrite in River Water Samples

Solvent Stir Bar Microextraction Technique With Three-Hollow Fiber Configuration for Trace Determination of Nitrite in River Water Samples

Hamid Badiee, Mohammad Ali Zanjanchi, Abbasali Zamani, Armin Fashi

Environ Sci Pollut Res Int. 2019 Nov;26(32):32967-32976.

PMID: 31512131

Abstract:

In this work, trace determination of nitrite in river water samples was studied using solvent stir bar microextraction system with three-hollow fiber configuration (3HF-SSBME) as a preconcentration step prior to UV-Vis spectrophotometry. The obtained results showed that the increase in the number of solvent bars can improve the extraction performance by increasing the contact area between acceptor and sample solutions. The extraction process relies on the well-known oxidation-reduction reaction of nitrite with iodide excess in acidic donor phase to form triiodide, and then its extraction into organic acceptor phase using a cationic surfactant. Various extraction parameters affecting the method were optimized and examined in detail. Detection limit of 1.6 μg L-1 and preconcentration factor of 282 can be attained after an extraction time of 8 min under the optimum conditions of this technique. The proposed method showed a linear response up to 1000 μg L-1 (r2 = 0.996) with relative standard deviation values less than 4.0%. The accuracy of the developed method was assessed using the Griess technique. Finally, the proposed method was successfully employed for quantification of nitrite in river water samples (Ghezelozan, Zanjan, Iran).

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP13311450	Tetrabutylammonium triiodide		13311-45-0	Price

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