Spectrophotometric determination of chromium in steel with 4-(2- thiazolylazo)-resorcinol (TAR) using microwave radiation

Carvalho, Luciene Santos de; Costa, Antônio Celso Spı́nola; Ferreira, Sérgio L.C.; Teixeira, Leonardo Sena Gomes

doi:10.1590/s0103-50532004000100025

Cited by 9 publications

(5 citation statements)

References 9 publications

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“…The band forms in the 350-358 nm range due to the HLs π-π* transformation. The band seen in the visible region between 550 and 545 nm, as well as 450 nm (shoulder), is attributed to n-π* digital change [23][24][25].Figure (4). Shown combined spectra of TAR & Dy 3+ complex.…”

Section: Electronic Spectramentioning

confidence: 99%

“…The reaction products are heavily tinted as well as show a particular form of complicated dye stuff that is extensively explored for its distinct (mainly optical) residential or commercial buildings. October 2023 ,Volume 25, Issue 1 Suggested that TAR ligand [4] behaves as a spectrophotometric reagent [5,6] , because it creates dark red coloured chelates with Dysprosium (III) metal ion and also some lanthanide metal ions in basic medium [7] , Figure (1) illustrate TAR ligand structure. TAR has actually been used in the spectrophotometric resolution of many metals as a colour-forming representative.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Biological Activity of Dysprosium Lanthanide Complex with Azo Ligand

Basheer Hussein,

Sabah Sabir

2023

DJM

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Background: The present study describes complex reaction between 4-(2-Thiazolylazo)resorcinol (TAR) and Dy(III) metal ion. The TAR compound is known to form coloured chelates with various lanthanide metal ions . Researches done in the field of azo complexes is relatively little. Objective: To Dysprosiumchloride was selected as a metallic salt, coordination complex of Dy(III) with TAR ligand were prepared, Dysprosium metal ion get chelates as it react with TAR. It’s been recognized for along interval of time that the azo group has the ability to develop a coordinate fitting with metal ions. Dy(III) complex was identified via FT-IR , UV-Vis. spectroscopy and measuring the electrical properties. The purpose of the research applied in the field of dyes Patients and Methods: The complex [Dy(TAR)2].Cl have been characterized by elemental analysis (CHN). TAR ligand and its complex were further studied using 1H-NMR and 13C-NMR techniques. Spectra of this complex shows that the TAR compound behaves as a tridentate manner via (ONN) atoms . Results: The antibacterial activity of free ligand and so Dy(III) complex were investigated .The composition of the chelate was found to be 1:2 (M:L) .Dy(III) metal ion was six coordinate the analytical results of the complex show the ratio of stoichiometry and complex showed octahedral geometry around metal ion . Conclusion: All results indicates that the Dy complex have the chemical formula [Dy(TAR)2].Cl The overall number of points of attachment to the central element is termed the coordination number.The study of biological activity shows that the complex is more effective than the ligand. Keywords: Trivalent metal ion , spectral studies , chelate azo reagent lanthanide , antibacterial activity.

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Section: Electronic Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and Biological Activity of Dysprosium Lanthanide Complex with Azo Ligand

Basheer Hussein,

Sabah Sabir

2023

DJM

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“…In order to achieve a pH value whereas Cr(III) and Cr(VI) could be selectivity separated with Cr(VI) specie [34]. Therefore, taking into account the obtained results from dispersive magnetic extraction and cloud point extraction, both Cr(III) and Cr(VI) can be selectively preconcentrated under the same sample pH (5.0), being this value adopted through manuscript.…”

Section: Cr(vi)mentioning

confidence: 99%

Speciation analysis of chromium in water samples through sequential combination of dispersive magnetic solid phase extraction using mesoporous amino-functionalized Fe3O4/SiO2 nanoparticles and cloud point extraction

Diniz

Tarley

2015

Microchemical Journal

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The present paper describes the sequential combination of dispersive magnetic solid phase extraction (DMSPE) with cloud point extraction (CPE) as a new nonchromatographic approach for preconcentration/redox speciation of chromium with FAAS detection. The method is based on sequential preconcentration of Cr(VI) at pH 5.0 onto mesoporous amino-functionalized Fe3O4/SiO2 nanoparticles followed by cloud point extraction of Cr(III) as metallic complex with 4-(2-thiazolylazo)resorcinol (TAR). The variables that play an important role on the performance of both preconcentration methods were thoroughly optimized by means of factorial design. Under optimized condition, an aliquot of 45.0 mL of sample was preconcentrated onto 25 mg of magnetic nanoparticles during 1 min following the elution with 0.5 mL of 2.5 mol L -1 HCl. The supernatant containing Cr(III) was then subjected to CPE procedure, in which was accomplished by using thermostatic bath at 90 o C during 45 min, 5.8 x 10 -4 mol L -1 TAR and 0.3% (v/v) Triton X-114. The method provided preconcentration factors of 16 and 12 times yielding limits of detection (LOD) and quantification (LOQ) of 1.1 and 3.6 µg L -1 for Cr(VI) and 3.2 and 10.5 µg L -1 for Cr(III), respectively. A high tolerance toward potentially interfering ions (cations and anions) and humic acid was observed for the method. Precision (n=10) of the procedure determined as relative standard deviation (RSD) were, 5.8 and 3.7% for Cr(III) using solutions at 15.0 and 165.0 μg L -1 and 5.5 and 3.0% for Cr(VI) using solutions at 15.0 and 75.0 μg L -1 concentrations, respectively. The applicability of method was attested by analysis of water samples yielding good recovery values (91.4-103.5 %). The accuracy of method was also checked for biological samples using a certified reference material DORM-3 (Fish Protein Certified Reference Material for Trace Metals).

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“…Therefore, determination of Cr species at trace levels, usually includes preparation and preconcentration steps prior to elemental detection in order to achieve accurate, reliable and sensitive results [9,10]. Some preconcentration methods have used chelation with diphenylcarbazide [11,12] or 4-(2-thiazolilazo)-resorcinol (TAR) [13], as a previous step to metal adsorption on polymeric resins, like XAD [14,15]. On the other hand, ionic exchange materials, like alumina [16,17] and commercial polymeric resin, such as Dowex or Amberlite, have been widely used with good results [1,18,19].…”

Section: Introductionmentioning

confidence: 99%

A novel fiber-packed column for on-line preconcentration and speciation analysis of chromium in drinking water with flame atomic absorption spectrometry

Monasterio

Altamirano

Martínez

et al. 2009

Talanta

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Spectrophotometric determination of chromium in steel with 4-(2- thiazolylazo)-resorcinol (TAR) using microwave radiation

Cited by 9 publications

References 9 publications

Synthesis and Biological Activity of Dysprosium Lanthanide Complex with Azo Ligand

Synthesis and Biological Activity of Dysprosium Lanthanide Complex with Azo Ligand

Speciation analysis of chromium in water samples through sequential combination of dispersive magnetic solid phase extraction using mesoporous amino-functionalized Fe3O4/SiO2 nanoparticles and cloud point extraction

A novel fiber-packed column for on-line preconcentration and speciation analysis of chromium in drinking water with flame atomic absorption spectrometry

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