[en] The objective of this work is to present the relational database, named FALCAO. It was created and implemented to support the storage of the monitored variables in the IEA-R1 research reactor, located in the Instituto de Pesquisas Energeticas e Nucleares, IPEN/CNEN-SP. The data logical model and its direct influence in the integrity of the provided information are carefully considered. The concepts and steps of normalization and de normalization including the entities and relations involved in the logical model are presented. It is also presented the effects of the model rules in the acquisition, loading and availability of the final information, under the performance concept since the acquisition process loads and provides lots of information in small intervals of time. The SACD application, through its functionalities, presents the information stored in the FALCAO database in a practical and optimized form. The implementation of the FALCAO database occurred successfully and its existence leads to a considerably favorable situation. It is now essential to the routine of the researchers involved, not only due to the substantial improvement of the process but also to the reliability associated to it. (author)

[en] Short communication

[en] Short communication

No abstract available

[en] All initial steps for the creation of a relational database, named FALCAO, to support the storing of the monitored variables in the IEA-R1 research reactor, located in the IPEN - Brazilian Institute of Nuclear and Energy Research, are introduced. As introduction, it is considered the modelling importance of the logic diagram and its direct influence in the integrity of the provided information. It is presented the concepts and steps of normalization and de normalization including the entities and relations involved in the logical model. It is also presented the effects of the model rules in the acquisition, loading and availability of the final information, under the performance concept, since the acquisition process, loads and provides lots of information in small intervals of time The data logical model, considering the desired performance and the sharing information is also presented. (author)

[en] The objective of this work is to introduce all initial steps for the creation of a relational database, named FALCAO, to support the storaging of the monitored variables in the IEA-R1 research reactor, located in the Instituto de Pesquisas Energeticas e Nucleares, IPEN-CNEN/SP. As introduction, it is considered the modeling importance of the logic diagram and its direct influence in the integrity of the provided information. It is presented the concepts and steps of normalization and denormalization including the entities and relations involved in the logical model. It is also presented the effects of the model rules in the acquisition, loading and availability of the final information, under the performance concept, since the acquisition process, loads and provides lots of information in small intervals of time. The data logical model, considering the desired performance and the sharing information is also presented. (author)

No abstract available

[en] Simultaneous electrolytic deposition is proposed for minimization of Cu²⁺ and Pb²⁺ interferences on automated determination of Cd²⁺ by the Malachite Green-iodide reaction. During electrolysis of sample in a cell with two Pt electrodes and a medium adjusted to 5% (v/v) HNO₃ + 0.1% (v/v) H₂SO₄ + 0.5 mol L^-1 NaCl, Cu²⁺ is deposited as Cu on the cathode, Pb²⁺ is deposited as PbO₂ on the anode while Cd²⁺ is kept in solution. With 60 s electrolysis time and 0.25 A current, Pb²⁺ and Cu²⁺ levels up to 50 and 250 mg L^-1 respectively, can be tolerated without interference. With on-line extraction of Cd²⁺ in anionic resin mini column, calibration graph in the 5.00 - 50.0 μg Cd L^-1 range is obtained, corresponding to twenty measurements per hour, 0.7 mg Malachite Green and 500 mg Kl and 5 mL sample consumed per determination. Results of the determination of Cd in certified reference materials, vegetables and tap water were in agreement with certified values and with those obtained by GFAAS at 95% confidence level. The detection limit is 0.23 μg Cd L-1 and the RSD for typical samples containing 13.0 μg Cd L^-1 was 3.85 % (n= 12). (author)

No abstract available

[en] In this work it was developed a procedure for the determination of vanadium in urine samples by electrothermal atomic absorption spectrometry using successive injections for preconcentration into a preheated graphite tube. Three 60 μL volumes were sequentially injected into the atomizer preheated to a temperature of 110 deg C. Drying and pyrolysis steps were carried out after each injection. A chemical modifier, barium difluoride (100 mg L^-1), and a surfactant, Triton X-100 (0.3% v v^-1), were added to the urine sample. When injecting into a hot graphite tube, the sample flow-rate was 0.5 μ s^-1. The limits of detection and quantification were 0.54 and 1.82 without preconcentration, and 0.11 and 0.37 μg L^-1 with preconcentration, respectively. The accuracy of the procedure was evaluated by an addition-recovery experiment employing urine samples. Recoveries varied from 96.0 to 103% for additions ranging from 0.8 to 3.5 μg L^-1 V. The developed procedure allows the determination of vanadium in urine without any sample pretreatment and with minimal dilution of the sample. (author)