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Abstract  

A new idea of flow-injection analysis is described.

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Abstract  

The initiation, present status and future trends of radiometric flow-injection analysis is described.

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Abstract  

A flow injection on-line determination of uranium(VI) after preconcentration in a minicolumn having amberlite XAD-4 resin impregnated with dibenzoylmethane (DBM) is described. Uranium(VI) is selectively adsorbed from aqueous solution of pH 5.5 in the minicolumn (5.5 cm long with 5.0 mm i.d.) at a flow rate of 13.6 mL min−1. The uranium(VI) complex was desorbed from the resin by 0.1 mol dm−3 HCl at a flow rate of 4.2 mL min−1 and mixed with arsenazo-III solution (0.05% solution in 0.1 mol dm−3 HCl, 4.2 mL min−1), and taken to the flow through cell of spectrophotometer where its absorbance was measured at 651 nm. Various parameters affecting the complex formation and its elution were optimized. Peak height (absorbance) was used for data analyses. The preconcentration factors of 36 and 143, detection limits of 0.9 and 0.232 μg L−1, sample throughputs of 40 and 10 were obtained for preconcentration time of 60 and 300 s, respectively. The tolerance limits of many interfering cations like Th(IV) and rare-earth elements were improved. The proposed method was applied on different water (spiked tap, well and sea water) and biological samples and good recovery was obtained. The method was also validated on mocked uranium ore sample and the results were in good agreement with the reported value.

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of oxidized ketone bodies level in raw milk - A Flow Injection Method. Proceedings of the 1st Middle-European Buiatrics Congress, Balatonfüred, Hungary , pp. 316-320. Indication of energy-imbalance and primary bovine ketosis

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Abstract  

Software for computer aided radiometric flow-injection analysis (CARFIA) was modified for working with a 386 AT Computer for data input from keyboard and for computing dispersion, concentration, peak height, constant k and S-half values.

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Abstract  

Determination of137Cs and60Co by using modified and reverse radiometric flow injection analysis is described. Two component RFIA was also realized using60Co and137Cs radionuclides.

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Abstract  

Radiometric Flow Injection Analysis of a radioactive (131I) sample is described. For analysis an ASIA (Ismatec) analyzer with a NaI (Tl) scintillation detector was used.

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Journal of Radioanalytical and Nuclear Chemistry
Authors: Jorge Guzmán Mar, Leticia López Martínez, Pedro López de Alba, Nancy Ornelas Soto, and Víctor Cerdà Martín

Abstract  

A multisyringe flow injection analysis method for the determination of uranium in water samples was developed. The methodology was based on the complexation reaction of uranium with arsenazo (III) at pH 2.0. Uranium concentrations were spectrophotometrically detected at 649 nm using a light emitting diode. Under the optimized conditions, a linear dynamic range from 0.1 to 4.0 μg mL−1, a 3σ detection limit of 0.04 μg mL−1, and a 10σ quantification limit of 0.10 μg mL−1 were obtained. The reproducibility (%) at 0.5, 2.5, and 4.0 μg mL−1 was 2.5, 0.9, and 0.6%, respectively (n = 10). The interference effect of some ions was tested. The proposed method was successfully applied to the determination of uranium in water samples.

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Abstract  

A flow injection analysis (FIA) system is described for the determination of uranium. The system consists of a microcolumn packed with. U/TEVA.SpecTM, chromatographic resin for on-line sample separation. The eluate is mixed with 4-(2-pyridylazo) resorcinol (PAR). The colored product is continuously monitored spectrophotometrically.

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Abstract  

A new application of reverse radiometric flow injection analysis is described. RFIA was used for the analysis of radioactive waste-waters. ASIA (Ismatec) analyzer with NaI(Tl) scintillation detector was used in the study of analysis of131I containing waste-water.

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