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- W3127116114 abstract "• VCl 3 was used as a reductant in flow injection method for TDN determination. • An on-line ultraviolet digester was proposed for sample digestion. • The proposed approach provides similar results with a well-known reference method. • The proposed analytic method is suitable for TDN determination in natural waters. Herein, a flow injection analysis (FIA) was established for the spectrophotometric determination of total dissolved nitrogen (TDN) in natural waters. An on-line ultraviolet digester was used for sample digestion, and a nontoxic and soluble reductant, vanadium chloride (VCl 3 ), was for the first time used in flow injection method for TDN determination. The digestion mode, reagent concentration, and influence of organic matter were investigated. The experimental results revealed a detection limit of 0.04 mgN L −1 and linearity of up to 3.0 mgN L −1 . Recovery from natural water samples was between 87.0 and 104.4%. The accuracy of the method was ensured by using national certified reference materials of total nitrogen GSB 07-3168-2014 (batch NO. 203261 and 203262), and satisfactory results were achieved. The proposed method was used to the determination of TDN in natural water samples, and results obtained were similar to those provided by the autoclave alkaline persulfate digestion and copperized cadmium column reduction method. The results obtained herein showed that the proposed method had a high potential for field or monitoring application." @default.
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- W3127116114 date "2021-05-01" @default.
- W3127116114 modified "2023-10-16" @default.
- W3127116114 title "Flow injection analysis method for determination of total dissolved nitrogen in natural waters using on-line ultraviolet digestion and vanadium chloride reduction" @default.
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- W3127116114 doi "https://doi.org/10.1016/j.microc.2021.105993" @default.
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