Authors:Shabnam Shahida, Akbar Ali, Muhammad Khan, and Muhammad Saeed
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.
of oxidized ketone bodies level in raw milk - A FlowInjection Method. Proceedings of the 1st Middle-European Buiatrics Congress, Balatonfüred, Hungary , pp. 316-320.
Indication of energy-imbalance and primary bovine ketosis
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.
Authors:Jorge Guzmán Mar, Leticia López Martínez, Pedro López de Alba, Nancy Ornelas Soto, and Víctor Cerdà Martín
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.
Authors:K. Grudpan, J. Jakmunee, and P. Sooksamiti
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.
Authors:U Myint, J. Tölgyessy, Naing Win, Khaing San, Ba Han, and Khin Myoe
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.