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Pesquisa : D02.845.250 [Categoria DeCS]
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  1 / 74 MEDLINE  
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[PMID]:27979229
[Au] Autor:Tiwari S; Deb MK; Sen BK
[Ad] Endereço:School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh 492010, India.
[Ti] Título:Cloud point extraction and diffuse reflectance-Fourier transform infrared spectroscopic determination of chromium(VI): A probe to adulteration in food stuffs.
[So] Source:Food Chem;221:47-53, 2017 Apr 15.
[Is] ISSN:0308-8146
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A new cloud point extraction (CPE) method for the determination of hexavalent chromium i.e. Cr(VI) in food samples is established with subsequent diffuse reflectance-Fourier transform infrared (DRS-FTIR) analysis. The method demonstrates enrichment of Cr(VI) after its complexation with 1,5-diphenylcarbazide. The reddish-violet complex formed showed λ at 540nm. Micellar phase separation at cloud point temperature of non-ionic surfactant, Triton X-100 occurred and complex was entrapped in surfactant and analyzed using DRS-FTIR. Under optimized conditions, the limit of detection (LOD) and quantification (LOQ) were 1.22 and 4.02µgmL , respectively. Excellent linearity with correlation coefficient value of 0.94 was found for the concentration range of 1-100µgmL . At 10µgmL the standard deviation for 7 replicate measurements was found to be 0.11µgmL . The method was successfully applied to commercially marketed food stuffs, and good recoveries (81-112%) were obtained by spiking the real samples.
[Mh] Termos MeSH primário: Cromo/análise
Análise de Alimentos
Espectroscopia de Infravermelho com Transformada de Fourier/métodos
[Mh] Termos MeSH secundário: Cromo/química
Cromo/isolamento & purificação
Difenilcarbazida/química
Limite de Detecção
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0R0008Q3JB (Chromium); 18540-29-9 (chromium hexavalent ion); 1W1XPA8N0P (Diphenylcarbazide)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:171003
[Lr] Data última revisão:
171003
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161217
[St] Status:MEDLINE


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[PMID]:27385521
[Au] Autor:Bregnbak D; Johansen JD; Hamann D; Hamann CR; Hamann C; Spiewak R; Menné T; Zachariae C; Jellesen MS; Thyssen JP
[Ad] Endereço:Department of Dermato-Allergology, Copenhagen University Hospital Gentofte, University of Copenhagen, Hellerup 2900, Denmark.
[Ti] Título:Assessment of chromium(VI) release from 848 jewellery items by use of a diphenylcarbazide spot test.
[So] Source:Contact Dermatitis;75(2):115-7, 2016 Aug.
[Is] ISSN:1600-0536
[Cp] País de publicação:England
[La] Idioma:eng
[Mh] Termos MeSH primário: Cromo/análise
Difenilcarbazida
Indicadores e Reagentes
Joias/análise
[Mh] Termos MeSH secundário: Espectrometria por Raios X
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Indicators and Reagents); 0R0008Q3JB (Chromium); 18540-29-9 (chromium hexavalent ion); 1W1XPA8N0P (Diphenylcarbazide)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170410
[Lr] Data última revisão:
170410
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160708
[St] Status:MEDLINE
[do] DOI:10.1111/cod.12577


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[PMID]:27144948
[Au] Autor:Hedberg YS; Lidén C
[Ad] Endereço:Division of Surface and Corrosion Science, Department of Chemistry, School of Chemical Science and Engineering, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden.
[Ti] Título:Chromium(III) and chromium(VI) release from leather during 8 months of simulated use.
[So] Source:Contact Dermatitis;75(2):82-8, 2016 Aug.
[Is] ISSN:1600-0536
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Chromium (Cr) release from Cr-tanned leather articles is a major cause of Cr contact dermatitis. It has been suggested that Cr(VI) release from leather is not necessarily an intrinsic property of the leather, but is strongly dependent on environmental conditions. OBJECTIVES: To test this hypothesis for long-term (8 months) simulated use. MATERIALS AND METHODS: The release of total Cr and Cr(VI) from Cr-tanned, unfinished leather was analysed in subsequent phosphate buffer (pH 8.0) immersions for a period of 7.5 months. The effect of combined ultraviolet treatment and alkaline solution (pH 12.1) was tested. Dry storage [20% relative humidity (RH)] was maintained between immersions. Atomic absorption spectroscopy, X-ray fluorescence and diphenylcarbazide tests were used. RESULTS: Cr(VI) release was dependent on previous dry storage or alkaline treatment, but not on duration or number of previous immersions. Cr(III) release decreased with time. Fifty-two percent of the total Cr released during the last immersion period was Cr(VI). Cr(VI) release exceeded 9 mg/kg in all immersion periods except in the first 10-day immersion (2.6 mg/kg). CONCLUSIONS: Cr(VI) release is primarily determined by environmental factors (RH prior to immersion, solution pH, and antioxidant content). The RH should be kept low prior to testing Cr(VI) release from leather.
[Mh] Termos MeSH primário: Cromo/análise
Curtume
[Mh] Termos MeSH secundário: Antioxidantes
Cromo/efeitos adversos
Dermatite Alérgica de Contato/etiologia
Difenilcarbazida
Seres Humanos
Umidade
Concentração de Íons de Hidrogênio
Indicadores e Reagentes
Espectrometria por Raios X
Espectrofotometria Atômica
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antioxidants); 0 (Indicators and Reagents); 0R0008Q3JB (Chromium); 18540-29-9 (chromium hexavalent ion); 1W1XPA8N0P (Diphenylcarbazide)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170410
[Lr] Data última revisão:
170410
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160505
[St] Status:MEDLINE
[do] DOI:10.1111/cod.12581


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[PMID]:26177404
[Au] Autor:He D; Zheng M; Ma T; Ni J
[Ad] Endereço:Shenzhen Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China; Department of Environmental Engineering, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking
[Ti] Título:Nitrite interference and elimination in diphenylcarbazide (DPCI) spectrophotometric determination of hexavalent chromium.
[So] Source:Water Sci Technol;72(2):223-9, 2015.
[Is] ISSN:0273-1223
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Cr(VI) is highly noted as a carcinogenic, mutagenic, and teratogenic pollutant. However, accurate determination of Cr(VI) in aqueous samples is difficult using the conventional diphenylcarbazide (DPCI) spectrophotometric method upon being interfered by co-existed nitrite. This paper illustrates how to eliminate the nitrite influence in a simple but efficient method based on a detailed analysis of interference mechanism. High-performance liquid chromatography analysis revealed that under acidic condition, DPCI was oxidized by nitrite to other substrates, which could not react with Cr(VI). The final oxidation product of DPCI was further purified by thin-layer chromatography and identified as diaryl carbodiazone by Fourier Transform Ion Cyclotron Resonance-Mass Spectrometry (FTICR-MS) and nuclear magnetic resonance. Consequently, an improved method was proposed by simply adding sulfamic acid for eliminating the nitrite interference in Cr(VI) determination. The proposed method was successfully confirmed by the accurate recovery of Cr(VI) from spiked water samples and further proven with inductively coupled plasma-atomic emission spectroscopy, which demonstrated a great potential for determining Cr(VI) concentration in aqueous samples containing nitrite.
[Mh] Termos MeSH primário: Cromo/análise
Difenilcarbazida/química
Nitritos/química
Espectrofotometria Atômica/métodos
Espectrofotometria/métodos
Poluentes Químicos da Água/análise
[Mh] Termos MeSH secundário: Oxirredução
[Pt] Tipo de publicação:EVALUATION STUDIES; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Nitrites); 0 (Water Pollutants, Chemical); 0R0008Q3JB (Chromium); 18540-29-9 (chromium hexavalent ion); 1W1XPA8N0P (Diphenylcarbazide)
[Em] Mês de entrada:1510
[Cu] Atualização por classe:150716
[Lr] Data última revisão:
150716
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150716
[St] Status:MEDLINE
[do] DOI:10.2166/wst.2015.203


  5 / 74 MEDLINE  
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[PMID]:25919302
[Au] Autor:Bregnbak D; Johansen JD; Jellesen MS; Zachariae C; Thyssen JP
[Ad] Endereço:Department of Dermato-Allergology, National Allergy Research Centre, Gentofte University Hospital, Hellerup, 2900, Denmark.
[Ti] Título:Chromium(VI) release from leather and metals can be detected with a diphenylcarbazide spot test.
[So] Source:Contact Dermatitis;73(5):281-8, 2015 Nov.
[Is] ISSN:1600-0536
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Along with chromium, nickel and cobalt are the clinically most important metal allergens. However, unlike for nickel and cobalt, there is no validated colorimetric spot test that detects chromium. Such a test could help both clinicians and their patients with chromium dermatitis to identify culprit exposures. OBJECTIVES: To evaluate the use of diphenylcarbazide (DPC) as a spot test reagent for the identification of chromium(VI) release. METHODS: A colorimetric chromium(VI) spot test based on DPC was prepared and used on different items from small market surveys. RESULTS: The DPC spot test was able to identify chromium(VI) release at 0.5 ppm without interference from other pure metals, alloys, or leather. A market survey using the test showed no chromium(VI) release from work tools (0/100). However, chromium(VI) release from metal screws (7/60), one earring (1/50), leather shoes (4/100) and leather gloves (6/11) was observed. We found no false-positive test reactions. Confirmatory testing was performed with X-ray fluorescence (XRF) and spectrophotometrically on extraction fluids. CONCLUSIONS: The use of DPC as a colorimetric spot test reagent appears to be a good and valid test method for detecting the release of chromium(VI) ions from leather and metal articles. The spot test has the potential to become a valuable screening tool.
[Mh] Termos MeSH primário: Ligas de Cromo/química
Cromo/análise
Vestuário
Colorimetria/métodos
Difenilcarbazida
[Mh] Termos MeSH secundário: Reações Falso-Positivas
Joias
Sapatos
Espectrometria por Raios X
Espectrofotometria
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Chromium Alloys); 0R0008Q3JB (Chromium); 18540-29-9 (chromium hexavalent ion); 1W1XPA8N0P (Diphenylcarbazide)
[Em] Mês de entrada:1608
[Cu] Atualização por classe:151016
[Lr] Data última revisão:
151016
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150429
[St] Status:MEDLINE
[do] DOI:10.1111/cod.12406


  6 / 74 MEDLINE  
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[PMID]:25655820
[Au] Autor:Coelho C; Branco R; Natal-da-Luz T; Sousa JP; Morais PV
[Ad] Endereço:IMAR-CMA, 3004-517 Coimbra, Portugal.
[Ti] Título:Evaluation of bacterial biosensors to determine chromate bioavailability and to assess ecotoxicity of soils.
[So] Source:Chemosphere;128:62-9, 2015 Jun.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Chromate can be considered a potent environmental contaminant and consequently, an understanding of chromate availability and toxicity to soil biology is essential for effective ecological assessment of metal impact in soils. This study shows the response of two bacterial bioreporters, pCHRGFP1 Escherichiacoli and pCHRGFP2 Ochrobactrumtritici, to increasing concentrations of chromate in two different soils. The bioreporters, carrying the regulatory gene chrB transcriptionally fused to the gfp reporter system, exhibited different features. In both, the fluorescence signal and the chromate concentration could be linearly correlated but E. coli biosensor functioned within the range of 0.5-2 µM and O. tritici biosensor within 2-10 µM chromate. The bioreporters were validated through comparative measurements using the chemical chromate methods of diphenylcarbazide and ionic chromatography. The bacterial sensors were used for the estimation of bioavailable fraction of chromate in a natural soil and OECD artificial soil, both spiked with chromate in increasing concentrations of 0-120 mg Cr(VI) kg(-1) of soil. OECD soil showed a faster chromate decrease comparing to the natural soil. The toxicity of soils amended with chromate was also evaluated by ecotoxicological tests through collembolan reproduction tests using Folsomia candida as test organism. Significant correlations were found between collembolans reproduction and chromate concentration in soil (lower at high chromate concentrations) measured by biosensors. Data obtained showed that the biosensors tested are sensitive to chromate presence in soil and may constitute a rapid and efficient method to measure chromate availability in soils.
[Mh] Termos MeSH primário: Artrópodes/efeitos dos fármacos
Técnicas Biossensoriais/normas
Cromatos/toxicidade
Ecotoxicologia/métodos
Escherichia coli/efeitos dos fármacos
Ochrobactrum/efeitos dos fármacos
Poluentes do Solo/toxicidade
[Mh] Termos MeSH secundário: Animais
Disponibilidade Biológica
Cromatos/metabolismo
Cromatografia por Troca Iônica
Cromo/metabolismo
Cromo/toxicidade
Difenilcarbazida/metabolismo
Escherichia coli/metabolismo
Ochrobactrum/metabolismo
Poluentes do Solo/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; VALIDATION STUDIES
[Nm] Nome de substância:
0 (Chromates); 0 (Soil Pollutants); 0R0008Q3JB (Chromium); 18540-29-9 (chromium hexavalent ion); 1W1XPA8N0P (Diphenylcarbazide)
[Em] Mês de entrada:1512
[Cu] Atualização por classe:150327
[Lr] Data última revisão:
150327
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150207
[St] Status:MEDLINE


  7 / 74 MEDLINE  
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[PMID]:24960308
[Au] Autor:Zhang Z; Yu F; Huang L; Jiatieli J; Li Y; Song L; Yu N; Dionysiou DD
[Ad] Endereço:School of Environmental Science, Liaoning University, Shenyang 110036, China. Electronic address: lnuhjhx@163.com.
[Ti] Título:Confirmation of hydroxyl radicals (•OH) generated in the presence of TiO2 supported on AC under microwave irradiation.
[So] Source:J Hazard Mater;278:152-7, 2014 Aug 15.
[Is] ISSN:1873-3336
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:In order to study the degradation mechanism of technology of microwave (MW) combined with TiO2 supported on activated carbon (TiO2/AC), the reactive oxygen species (ROS) was explored through oxidation of 1,5-diphenyl carbazide (DPCI) to 1,5-diphenyl carbazone (DPCO). Furthermore, 2,6-di-tert-butyl-4-methylphenol (BHT), Mannitol (MT) and Vitamin C (VC) were used as radical scavengers to confirm the generation of the hydroxyl radicals ((•)OH). In addition, the influence of some parameters such as TiO2 mass ratio content, irradiation time, material dose, DPCI concentration and MW power on the determination of (•)OH were examined. The results showed that the (•)OH could be generated under MW combined with loaded TiO2/AC. Also, anatase TiO2/AC can generate more (•)OH radicals than rutile TiO2/AC under MW irradiation. This work would provide new mechanistic insights on the enhanced degradation effect of organic pollutants in water using the supported TiO2/AC coupled with MW technology.
[Mh] Termos MeSH primário: Radical Hidroxila/química
Micro-Ondas
Titânio/química
Titânio/efeitos da radiação
[Mh] Termos MeSH secundário: Antioxidantes/química
Ácido Ascórbico/química
Hidroxitolueno Butilado/química
Carbono/química
Difenilcarbazida/química
Manitol/química
Oxirredução
Semicarbazonas/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Antioxidants); 0 (Semicarbazones); 15FIX9V2JP (titanium dioxide); 1P9D0Z171K (Butylated Hydroxytoluene); 1W1XPA8N0P (Diphenylcarbazide); 3352-57-6 (Hydroxyl Radical); 3OWL53L36A (Mannitol); 7440-44-0 (Carbon); 96YS88318X (diphenylcarbazone); D1JT611TNE (Titanium); PQ6CK8PD0R (Ascorbic Acid)
[Em] Mês de entrada:1504
[Cu] Atualização por classe:151119
[Lr] Data última revisão:
151119
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140625
[St] Status:MEDLINE


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[PMID]:24853102
[Au] Autor:Kuroda H; Kodama N; Sun XY; Ozawa S; Takahashi Y
[Ad] Endereço:The Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama, 700-8530 JapanJapan Science and Technology Agency, CREST.
[Ti] Título:Requirement for Asn298 on D1 protein for oxygen evolution: analyses by exhaustive amino acid substitution in the green alga Chlamydomonas reinhardtii.
[So] Source:Plant Cell Physiol;55(7):1266-75, 2014 Jul.
[Is] ISSN:1471-9053
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:PSII generates strong oxidants used for water oxidation. The secondary electron donor, Y(Z), is Tyr161 on PSII reaction center D1 protein and mediates electron transfer from the oxygen-evolving Mn(4)CaO(5) cluster to the primary electron donor, P680. The latest PSII crystal structure revealed the presence of a hydrogen bond network around Y(Z), which is anticipated to play important roles in the electron and proton transfer reactions. Y(Z) forms a hydrogen bond with His190 which in turn forms a hydrogen bond with Asn298 on D1 protein. Although functional roles of Y(Z) and His190 have already been characterized, little is known about the functional role of Asn298. Here we have generated 19 mutants from a green alga Chlamydomonas reinhardtii, in which the Asn298 has been substituted by each of the other 19 amino acid residues. All mutants showed significantly impaired or no photosynthetic growth. Seven mutants capable of photosynthetic growth showed oxygen-evolving activity although at a significantly reduced rate. Interestingly the oxygen-evolving activity of these mutants was markedly photosensitive. The 19 mutants accumulated PSII at variable levels and showed a light-induced electron transfer reaction from 1,5-diphenylcarbazide (DPC) to 2,6-dichlorophenolindophenol (DCIP), suggesting that Asn298 is important for the function and photoprotection of the Mn(4)CaO(5) cluster.
[Mh] Termos MeSH primário: Asparagina/metabolismo
Chlamydomonas reinhardtii/genética
Oxigênio/metabolismo
Fotossíntese
Complexo de Proteína do Fotossistema II/metabolismo
[Mh] Termos MeSH secundário: 2,6-Dicloroindofenol/metabolismo
Substituição de Aminoácidos
Chlamydomonas reinhardtii/metabolismo
Chlamydomonas reinhardtii/efeitos da radiação
Clorofila/metabolismo
Difenilcarbazida/metabolismo
Transporte de Elétrons
Cinética
Luz
Manganês/metabolismo
Mutagênese Sítio-Dirigida
Mutação
Oxirredução
Complexo de Proteína do Fotossistema II/química
Complexo de Proteína do Fotossistema II/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Photosystem II Protein Complex); 1406-65-1 (Chlorophyll); 1W1XPA8N0P (Diphenylcarbazide); 42Z2K6ZL8P (Manganese); 7006-34-0 (Asparagine); C35QN2Z58B (2,6-Dichloroindophenol); S88TT14065 (Oxygen)
[Em] Mês de entrada:1503
[Cu] Atualização por classe:140704
[Lr] Data última revisão:
140704
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140524
[St] Status:MEDLINE
[do] DOI:10.1093/pcp/pcu073


  9 / 74 MEDLINE  
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[PMID]:24682065
[Au] Autor:El-Kabbany F; Taha S; Hafez M
[Ad] Endereço:Physics Department, Faculty of Science, Cairo University, Cairo, Egypt.
[Ti] Título:A study of the phase transition of reheated diphenyl carbazide (DPC) by using UV spectroscopy.
[So] Source:Spectrochim Acta A Mol Biomol Spectrosc;128:481-8, 2014 Jul 15.
[Is] ISSN:1873-3557
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Phase transition phenomenon in reheated diphenyl carbazide (DPC) is studied here using UV spectroscopy. The optical band gap for reheated DPC is obtained by measuring the optical diffused reflectance (DR) and equals to 3.55 eV. Also, the optical band gap is calculated using UV technique and equals to 3.548 eV. The absorbance of reheated DPC is studied at some selected temperatures in order to check the presence of phase transitions at 90°C and 125°C. According to the present work, the band gaps are calculated at 80°C, 110°C and 130°C and equal to 3.548 eV. But at 100°C, the optical band gap has changed to 4.139 eV. It was found that each phase of reheated DPC belongs to a certain definite crystal structure. The presence of the phase transitions are checked and confirmed by scanning electron microscopy (SEM). The structural properties and morphology of reheated diphenyl carbazide are investigated by SEM. The SEM images are taken at some selected temperatures to confirm the presence of phase transitions.
[Mh] Termos MeSH primário: Difenilcarbazida/química
Temperatura Alta
Transição de Fase
[Mh] Termos MeSH secundário: Espectrofotometria Ultravioleta/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
1W1XPA8N0P (Diphenylcarbazide)
[Em] Mês de entrada:1412
[Cu] Atualização por classe:140424
[Lr] Data última revisão:
140424
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140401
[St] Status:MEDLINE


  10 / 74 MEDLINE  
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[PMID]:24148454
[Au] Autor:Gitet H; Subramanian PA; Minilu D; Kiros T; Hilawie M; Gebremariam G; Taye K
[Ad] Endereço:Department of Chemistry, College of Natural and Computational Sciences, Mekelle University, P.O. Box 231, Mekelle, Ethiopia. Electronic address: hintsushgk@gmail.com.
[Ti] Título:Speciation of chromium in soils near Sheba Leather Industry, Wukro Ethiopia.
[So] Source:Talanta;116:626-9, 2013 Nov 15.
[Is] ISSN:1873-3573
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:A study on speciation of chromium in soils near Sheba Leather Industry was performed by Flame Atomic Absorption (FAAS) after selective extraction of Cr(VI) using the EPA 3060A method, and oxidizing the Cr(III) residue in the soils with HNO3 and H2O2. The extraction method was evaluated using the spiking method with satisfactory results (recoveries>95% and RSDs<5%). The limit of detection (LOD) for Cr(VI) based on three times the standard deviations of the blank (for n=5) was 0.56 µg g(-1). Statistical evaluation indicated that the comparison of the sum of the concentrations of chromium species to that of the total concentration of chromium do not show any difference at 95% level of confidence. Besides, no statistically significant difference at 95% confidence level was observed between the UV-vis spectrophotometry and FAAS results for Cr(VI). However, it is observed that selective extraction of Cr(VI) using EPA 3060A and subsequent determination by FAAS is simple and faster compared to the other method. Furthermore, for comparison and as control two soil samples collected from a distance of about 2 km from the main Industry and effluent stream. The results indicate that higher total chromium content was observed in soils collected from the target area. Nevertheless, the maximum concentrations of Cr(VI) found in soil samples collected around Sheba Leather Industry was 9.9 µg g(-1) and are within the acceptable level of 10 µg g(-1) in accordance with the WHO.
[Mh] Termos MeSH primário: Cromo/análise
Resíduos Industriais/análise
Poluentes do Solo/análise
Solo/química
[Mh] Termos MeSH secundário: Difenilcarbazida/química
Etiópia
Seres Humanos
Peróxido de Hidrogênio/química
Concentração de Íons de Hidrogênio
Limite de Detecção
Ácido Nítrico/química
Oxirredução
Espectrofotometria Atômica
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Industrial Waste); 0 (Soil); 0 (Soil Pollutants); 0R0008Q3JB (Chromium); 1W1XPA8N0P (Diphenylcarbazide); 411VRN1TV4 (Nitric Acid); BBX060AN9V (Hydrogen Peroxide)
[Em] Mês de entrada:1406
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:131024
[St] Status:MEDLINE



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