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Welna M, Szymczycha-Madeja A, Pohl P. Novel ICP-OES-Based Method for the Reliable Determination of the Total Content of 15 Elements in Yerba Mate Drinks along with the Determination of Caffeine and the In Vitro Bioaccessibility of the Compounds. Molecules 2023; 28:molecules28083374. [PMID: 37110609 PMCID: PMC10145091 DOI: 10.3390/molecules28083374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/07/2023] [Accepted: 04/07/2023] [Indexed: 04/29/2023] Open
Abstract
A fully validated inductively coupled plasma optical emission spectrometry (ICP-OES)-based method combined with a simplified sample preparation procedure for the determination of up to 15 elements (Al, Ba, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, Pb, Sr, and Zn) in caffeinated yerba mate (YM) drinks was proposed. Various "green" treatments (acidification or dilution with a HNO3 solution and direct analysis of untreated YM with or without sonication (US)) that could replace the traditional total sample decomposition before spectrometric measurements were tested and compared. The key selection parameter was the analytical performance of the ICP-OES method obtained with each sample preparation procedure in terms of the precision and the trueness of results and limits of detection (LODs) of elements. It was found that the acidification of YMs with concentrated HNO3 to 5%, supported by US (10 min, room temperature (RT)), provided the best results, i.e., LODs at 0.11-8.5 ng g-1, precision below 5%, and trueness better than 5% (97.0%-105% as recoveries). Eleven YM drinks, commercially available on the Polish market, were analyzed with the proposed method. In addition to the mineral content, the concentration of caffeine in all analyzed YMs was determined and compared. Finally, the studies were completed by determining the bioaccessible fraction of selected elements and caffeine in YMs using in vitro gastrointestinal digestion (GID) in order to evaluate the nutritional value/risk assessment of these drinks. Accordingly, the bioaccessibility of nutritious elements (Ca, Fe, Mg, Mn, Zn) and caffeine was within 40%-59%. Except for Mn, it was established that by drinking daily 1 L of YMs, the recommended dietary intakes (RDIs) of the aforementioned essential elements were covered to a low degree (<4.5%). Hence, they are not an important source of these elements in the human diet. On the other hand, potentially toxic elements (Al, Ba, Sr) were found in a relatively inert form. Opposite to minerals, YMs can supply human organisms with quite high amounts of natural caffeine in bioaccessible form (31-70 mg per serving).
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Affiliation(s)
- Maja Welna
- Division of Analytical Chemistry and Chemical Metallurgy, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Anna Szymczycha-Madeja
- Division of Analytical Chemistry and Chemical Metallurgy, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Pawel Pohl
- Division of Analytical Chemistry and Chemical Metallurgy, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
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Torok AI, Levei EA, Constantin S, Moldovan OT, Senila M, Cadar O, Casoni D, Angyus SB, Tanaselia C, Covaci E, Frentiu T. Application of Inductively Coupled Plasma Spectrometric Techniques and Multivariate Statistical Analysis in the Hydrogeochemical Profiling of Caves-Case Study Cloșani, Romania. Molecules 2021; 26:6788. [PMID: 34833878 DOI: 10.3390/molecules26226788] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 11/03/2021] [Accepted: 11/04/2021] [Indexed: 11/16/2022] Open
Abstract
The aim of the study was to develop the hydrogeochemical profiling of caves based on the elemental composition of water and silty soil samples and a multivariate statistical analysis. Major and trace elements, including rare earths, were determined in the water and soil samples. The general characteristics of water, anions content, inorganic and organic carbon fractions and nitrogen species (NO3− and NH4+) were also considered. The ANOVA—principal component analysis (PCA) and two-way joining analysis were applied on samples collected from Cloșani Cave, Romania. The ANOVA-PCA revealed that the hydrogeochemical characteristics of Ca2+-HCO3− water facies were described by five factors, the strongest being associated with water-carbonate rock interactions and the occurrence of Ca, Mg and HCO3− (43.4%). Although organic carbon fractions have a lower influence (20.1%) than inorganic ones on water characteristics, they are involved in the chemical processes of nitrogen and of the elements involved in redox processes (Fe, Mn, Cr and Sn). The seasonal variability of water characteristics, especially during the spring, was observed. The variability of silty soil samples was described by four principal components, the strongest influence being attributed to rare earth elements (52.2%). The ANOVA-PCA provided deeper information compared to Gibbs and Piper diagrams and the correlation analysis.
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Terracciano R, Zhang A, Butler EB, Demarchi D, Hafner JH, Grattoni A, Filgueira CS. Effects of Surface Protein Adsorption on the Distribution and Retention of Intratumorally Administered Gold Nanoparticles. Pharmaceutics 2021; 13:216. [PMID: 33562434 PMCID: PMC7914653 DOI: 10.3390/pharmaceutics13020216] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/26/2021] [Accepted: 01/29/2021] [Indexed: 11/17/2022] Open
Abstract
The heterogeneous distribution of delivery or treatment modalities within the tumor mass is a crucial limiting factor for a vast range of theranostic applications. Understanding the interactions between a nanomaterial and the tumor microenvironment will help to overcome challenges associated with tumor heterogeneity, as well as the clinical translation of nanotheranostic materials. This study aims to evaluate the influence of protein surface adsorption on gold nanoparticle (GNP) biodistribution using high-resolution computed tomography (CT) preclinical imaging in C57BL/6 mice harboring Lewis lung carcinoma (LLC) tumors. LLC provides a valuable model for study due to its highly heterogenous nature, which makes drug delivery to the tumor challenging. By controlling the adsorption of proteins on the GNP surface, we hypothesize that we can influence the intratumoral distribution pattern and particle retention. We performed an in vitro study to evaluate the uptake of GNPs by LLC cells and an in vivo study to assess and quantify the GNP biodistribution by injecting concentrated GNPs citrate-stabilized or passivated with bovine serum albumin (BSA) intratumorally into LLC solid tumors. Quantitative CT and inductively coupled plasma optical emission spectrometry (ICP-OES) results both confirm the presence of particles in the tumor 9 days post-injection (n = 8 mice/group). A significant difference is highlighted between citrate-GNP and BSA-GNP groups (** p < 0.005, Tukey's multiple comparisons test), confirming that the protein corona of GNPs modifies intratumoral distribution and retention of the particles. In conclusion, our investigations show that the surface passivation of GNPs influences the mechanism of cellular uptake and intratumoral distribution in vivo, highlighting the spatial heterogeneity of the solid tumor.
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Affiliation(s)
- Rossana Terracciano
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA; (R.T.); (A.G.)
- Department of Electronics, Politecnico di Torino, 10129 Torino, Italy;
| | - Aobo Zhang
- Department of Physics & Astronomy, Rice University, Houston, TX 77005, USA; (A.Z.); (J.H.H.)
| | - E. Brian Butler
- Department of Radiation Oncology, Houston Methodist Research Institute, Houston, TX 77030, USA;
| | - Danilo Demarchi
- Department of Electronics, Politecnico di Torino, 10129 Torino, Italy;
| | - Jason H. Hafner
- Department of Physics & Astronomy, Rice University, Houston, TX 77005, USA; (A.Z.); (J.H.H.)
- Department of Chemistry, Rice University, Houston, TX 77005, USA
| | - Alessandro Grattoni
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA; (R.T.); (A.G.)
- Department of Radiation Oncology, Houston Methodist Research Institute, Houston, TX 77030, USA;
- Department of Surgery, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Carly S. Filgueira
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, TX 77030, USA; (R.T.); (A.G.)
- Department of Cardiovascular Surgery, Houston Methodist Research Institute, Houston, TX 77030, USA
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Nagai M, Sakurada K, Imaizumi K, Ogawa Y, Uo M, Funakoshi T, Uemura K. Evaluation of Parameters for Estimating the Postmortem Interval of Skeletal Remains Using Bovine Femurs: A Pilot Study. Diagnostics (Basel) 2020; 10:E1066. [PMID: 33317185 DOI: 10.3390/diagnostics10121066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/04/2020] [Accepted: 12/07/2020] [Indexed: 11/21/2022] Open
Abstract
The postmortem interval (PMI) of victims is a key parameter in criminal investigations. However, effective methods for estimating the PMI of skeletal remains have not been established because it is determined by various factors, including environmental conditions. To identify effective parameters for estimating the PMI of skeletal remains, we investigated the change in bone focusing on the amount of DNA, element concentrations, and bone density that occurred in the bone samples of bovine femurs, each maintained under one of five simulated environmental conditions (seawater, freshwater, underground, outdoors, and indoors) for 1 year. The amount of extracted mitochondrial DNA (mtDNA; 404 bp fragment) decreased over time, and significant DNA degradation (p < 0.01), as estimated by a comparison with amplification results for a shorter fragment (128 bp), was detected between 1 month and 3 months. Eleven of 30 elements were detected in samples by inductively coupled plasma optical emission spectrometry, and Na and Ba showed significant quantitative differences in terms of environmental conditions and time (p < 0.01). This preliminary study suggests that the level of DNA degradation determined by real-time polymerase chain reaction and element concentrations determined by inductively coupled plasma optical emission may be useful indices for estimating the PMI of victims under a wide range of environmental conditions. However, this study is a limited experimental research and not applicable to forensic cases as it is. Further studies of human bone with longer observation periods are required to verify these findings and to establish effective methods for PMI estimation.
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Pinheiro WO, Fascineli ML, Farias GR, Horst FH, de Andrade LR, Corrêa LH, Magalhães KG, Sousa MH, de Almeida MC, Azevedo RB, Lacava ZGM. The influence of female mice age on biodistribution and biocompatibility of citrate-coated magnetic nanoparticles. Int J Nanomedicine 2019; 14:3375-3388. [PMID: 31123402 PMCID: PMC6511116 DOI: 10.2147/ijn.s197888] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Magnetic nanoparticles (MNPs) have been successfully tested for several purposes in medical applications. However, knowledge concerning the effects of nanostructures on elderly organisms is remarkably scarce. PURPOSE To fill part of this gap, this work aimed to investigate biocompatibility and bio-distribution aspects of magnetic nanoparticles coated with citrate (NpCit) in both elderly and young healthy mice. METHODS NpCit (2.4 mg iron) was administered intraperitoneally, and its toxicity was evaluated for 28 days through clinical, biochemical, hematological, and histopathological examinations. In addition, its biodistribution was evaluated by spectrometric (inductively coupled plasma optical emission spectrometry) and histological methods. RESULTS NpCit presented age-dependent effects, inducing very slight and temporary biochemical and hematological changes in young animals. These changes were even weaker than the effects of the aging process, especially those related to the hematological data, tumor necrosis factor alpha, and nitric oxide levels. On the other hand, NpCit showed a distinct set of results in the elderly group, sometimes reinforcing (decrease of lymphocytes and increase of monocytes) and sometimes opposing (erythrocyte parameters and cytokine levels) the aging changes. Leukocyte changes were still observed on the 28th day after treatment in the elderly group. Slight evidence of a decrease in liver and immune functions was detected in elderly mice treated or not treated with NpCit. It was noted that tissue damage or clinical changes related to aging or to the NpCit treatment were not observed. As detected for aging, the pattern of iron biodistribution was significantly different after NpCit administration: extra iron was detected until the 28th day, but in different organs of elderly (liver and kidneys) and young (spleen, liver, and lungs) mice. CONCLUSION Taken together, the data show NpCit to be a stable and reasonably biocompatible sample, especially for young mice, and thus appropriate for biomedical applications. The data showed important differences after NpCit treatment related to the animals' age, and this emphasizes the need for further studies in older animals to appropriately extend the benefits of nanotechnology to the elderly population.
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Affiliation(s)
- Willie O Pinheiro
- Department of Genetics and Morphology, Institute of Biological Sciences, CNANO, University of Brasilia, Brasilia, DF 70910-900, Brazil,
- Post-graduation Program in Molecular Pathology, Faculty of Medicine, University of Brasilia, Brasília, DF 70910-900, Brazil,
| | - Maria L Fascineli
- Department of Genetics and Morphology, Institute of Biological Sciences, CNANO, University of Brasilia, Brasilia, DF 70910-900, Brazil,
| | - Gabriel R Farias
- Department of Genetics and Morphology, Institute of Biological Sciences, CNANO, University of Brasilia, Brasilia, DF 70910-900, Brazil,
| | - Frederico H Horst
- Department of Genetics and Morphology, Institute of Biological Sciences, CNANO, University of Brasilia, Brasilia, DF 70910-900, Brazil,
| | - Laise Rodrigues de Andrade
- Department of Genetics and Morphology, Institute of Biological Sciences, CNANO, University of Brasilia, Brasilia, DF 70910-900, Brazil,
| | - Luis Henrique Corrêa
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, Brasilia, DF 70910-900, Brazil
| | - Kelly Grace Magalhães
- Laboratory of Immunology and Inflammation, Department of Cell Biology, University of Brasilia, Brasilia, DF 70910-900, Brazil
| | - Marcelo Henrique Sousa
- Green Nanotechnology Group, Faculty of Ceilandia, University of Brasilia, Brasília, DF 72220-900, Brazil
| | - Marcos C de Almeida
- Department of Genetics and Morphology, Institute of Biological Sciences, CNANO, University of Brasilia, Brasilia, DF 70910-900, Brazil,
| | - Ricardo B Azevedo
- Department of Genetics and Morphology, Institute of Biological Sciences, CNANO, University of Brasilia, Brasilia, DF 70910-900, Brazil,
| | - Zulmira G M Lacava
- Department of Genetics and Morphology, Institute of Biological Sciences, CNANO, University of Brasilia, Brasilia, DF 70910-900, Brazil,
- Post-graduation Program in Molecular Pathology, Faculty of Medicine, University of Brasilia, Brasília, DF 70910-900, Brazil,
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Abstract
Synthetic leather samples from Brazil and Paraguay were evaluated in this study using three spectroscopy techniques: inductively coupled plasma optical emission spectrometry (ICP-OES), laser-induced breakdown spectroscopy (LIBS), and wavelength dispersive X-ray fluorescence (WDXRF). The obtained information from each technique was separately inspected with principal component analysis (PCA). The concentrations of the elements determined in the synthetic leathers using ICP-OES decreased in the following order: Ca > Cr > Mg > Ba > Pb > Al > Fe > Zn > Sb > Ni with a concentration range below the limit of quantification (<LOQ, case of Ni) to 112 233 mg kg-1 (case of Ca). Additionally, Cu, As, Sr, Ti, Cd, Mn, Co, and Ni were present in only few samples in a concentration range from <LOQ to 163 mg kg-1. Principal component analysis was the tool used to evaluate the samples from their chemical content obtained quantitatively using ICP-OES and qualitatively using LIBS or WDXRF spectra. The results showed that the association of PCA with spectroscopic techniques was satisfactory for data inspection of synthetic leathers according to the chemical composition. Laser-induced breakdown spectroscopy and WDXRF were able to identify the presence of toxic elements like Cr (LIBS and WDXRF) and Pb (WDXRF).
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Affiliation(s)
- Ariane Maciel Neiva
- Grupo de Análise Instrumental Aplicada (GAIA), Departamento de Química, Universidade Federal de São Carlos, Brazil
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Chirinos J, Oropeza D, González J, Zorba V, Russo RE. Analysis of Plant Leaves Using Laser Ablation Inductively Coupled Plasma Optical Emission Spectrometry: Use of Carbon to Compensate for Matrix Effects. Appl Spectrosc 2017; 71:709-720. [PMID: 28374607 DOI: 10.1177/0003702816683686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Direct solid sampling by laser ablation into an inductively coupled plasma synchronous vertical dual view optical emission spectroscope (LA-SVDV-ICP-OES) was used for the elemental analysis of nutrient elements Ca, B, Mn, Mg, K, and Zn and essential (non-metallic) elements P and S in plant materials. The samples were mixed with paraffin as a binder, an approach that provides better cohesion of the particles in the pellets in addition to supplying carbon to serve as an internal standard (atomic line C I 193.027 nm) as a way to compensate for matrix effects, and/or variations in the ablation process. Precision was in the range of 1-8% relative standard deviation (RSD) with limit of detection in the range of 0.4-1 mg/kg-1 and 25-640 mg/kg-1 for metallic and non-metallic elements, respectively.
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Affiliation(s)
- José Chirinos
- 1 Escuela de Química, Facultad de Ciencias, Universidad Central de Venezuela, Caracas, Venezuela
- 2 Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Dayana Oropeza
- 2 Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Jhanis González
- 2 Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- 3 Applied Spectra, Inc., Fremont, CA, USA
| | - Vassilia Zorba
- 2 Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Richard E Russo
- 2 Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- 3 Applied Spectra, Inc., Fremont, CA, USA
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Herrero Latorre C, Barciela García J, García Martín S, Peña Crecente RM. Solid phase extraction for the speciation and preconcentration of inorganic selenium in water samples: a review. Anal Chim Acta 2013; 804:37-49. [PMID: 24267061 DOI: 10.1016/j.aca.2013.09.054] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 09/26/2013] [Accepted: 09/29/2013] [Indexed: 11/29/2022]
Abstract
Selenium is an essential element for the normal cellular function of living organisms. However, selenium is toxic at concentrations of only three to five times higher than the essential concentration. The inorganic forms (mainly selenite and selenate) present in environmental water generally exhibit higher toxicity (up to 40 times) than organic forms. Therefore, the determination of low levels of different inorganic selenium species in water is an analytical challenge. Solid-phase extraction has been used as a separation and/or preconcentration technique prior to the determination of selenium species due to the need for accurate measurements for Se species in water at extremely low levels. The present paper provides a critical review of the published methods for inorganic selenium speciation in water samples using solid phase extraction as a preconcentration procedure. On the basis of more than 75 references, the different speciation strategies used for this task have been highlighted and classified. The solid-phase extraction sorbents and the performance and analytical characteristics of the developed methods for Se speciation are also discussed.
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Affiliation(s)
- C Herrero Latorre
- Universidad de Santiago de Compostela, Dpto. Química Analítica, Nutrición y Bromatología, Facultad de Ciencias, Alfonso X el Sabio s/n, 27002 Lugo, Spain.
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Arsenijević J, Marković J, Soštarić I, Ražić S. A chemometrics as a powerful tool in the elucidation of the role of metals in the biosynthesis of volatile organic compounds in Hungarian thyme samples. Plant Physiol Biochem 2013; 71:298-306. [PMID: 24007814 DOI: 10.1016/j.plaphy.2013.08.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 08/10/2013] [Indexed: 05/21/2023]
Abstract
The volatile fraction of the leaves of Thymus pannonicus All. (Lamiaceae) was analyzed by headspace extraction followed by GC-FID and GC-MS analysis. The different headspace profiles were recognized, with citral and with monoterpene hydrocarbons as dominant compounds. In addition, the determination of Cr, Co, Ni, Mo, Cu, Zn, Mn, Fe, Mg, Ca, K and Na was conducted by spectroscopic techniques (FAAS, GFAAS and ICP-OES). In order to evaluate the relationship between volatile organic compounds and metals, a chemometrics approach was applied. The data obtained by analysis of the headspace and elemental content were subjected to correlation analysis, factor analysis, principal component analysis and cluster analysis. A number of significant correlations of metals with plant volatiles were found. Correlation of Zn with citral, Mn with oxygenated monoterpenes and Mg with β-bourbonene, could be explained by involvement of metals in the biosynthesis of volatile organic compounds.
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Affiliation(s)
- Jelena Arsenijević
- University of Belgrade - Faculty of Pharmacy, Department of Pharmacognosy, Vojvode Stepe 450, 11221 Belgrade, Serbia.
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Amaral CDB, Nóbrega JA, Nogueira ARA. Sample preparation for arsenic speciation in terrestrial plants--a review. Talanta 2013; 115:291-9. [PMID: 24054594 DOI: 10.1016/j.talanta.2013.04.072] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 04/24/2013] [Accepted: 04/25/2013] [Indexed: 12/31/2022]
Abstract
Arsenic is an element widely present in nature. Additionally, it may be found as different species in several matrices and therefore it is one of the target elements in chemical speciation. Although the number of studies in terrestrial plants is low, compared to matrices such as fish or urine, this number is raising due to the fact that this type of matrix are closely related to the human food chain. In speciation analysis, sample preparation is a critical step and several extraction procedures present drawbacks. In this review, papers dealing with extraction procedures, analytical methods, and studies of species conservation in plants cultivated in terrestrial environment are critically discussed. Analytical procedures based on extractions using water or diluted acid solutions associated with HPLC-ICP-MS are good alternatives, owing to their versatility and sensitivity, even though less expensive strategies are shown as feasible choices.
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Affiliation(s)
- Clarice D B Amaral
- Group of Applied Instrumental Analysis, Department of Chemistry, Federal University of São Carlos, PO Box 676, 13560-970 São Carlos, SP, Brazil; Embrapa Southeast Livestock, PO Box 339, 13560-970 São Carlos, SP, Brazil
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Frentiu T, Ponta M, Hategan R. Validation of an analytical method based on the high-resolution continuum source flame atomic absorption spectrometry for the fast-sequential determination of several hazardous/priority hazardous metals in soil. Chem Cent J 2013; 7:43. [PMID: 23452327 PMCID: PMC3771560 DOI: 10.1186/1752-153x-7-43] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Accepted: 02/11/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The aim of this paper was the validation of a new analytical method based on the high-resolution continuum source flame atomic absorption spectrometry for the fast-sequential determination of several hazardous/priority hazardous metals (Ag, Cd, Co, Cr, Cu, Ni, Pb and Zn) in soil after microwave assisted digestion in aqua regia. Determinations were performed on the ContrAA 300 (Analytik Jena) air-acetylene flame spectrometer equipped with xenon short-arc lamp as a continuum radiation source for all elements, double monochromator consisting of a prism pre-monocromator and an echelle grating monochromator, and charge coupled device as detector. For validation a method-performance study was conducted involving the establishment of the analytical performance of the new method (limits of detection and quantification, precision and accuracy). Moreover, the Bland and Altman statistical method was used in analyzing the agreement between the proposed assay and inductively coupled plasma optical emission spectrometry as standardized method for the multielemental determination in soil. RESULTS The limits of detection in soil sample (3σ criterion) in the high-resolution continuum source flame atomic absorption spectrometry method were (mg/kg): 0.18 (Ag), 0.14 (Cd), 0.36 (Co), 0.25 (Cr), 0.09 (Cu), 1.0 (Ni), 1.4 (Pb) and 0.18 (Zn), close to those in inductively coupled plasma optical emission spectrometry: 0.12 (Ag), 0.05 (Cd), 0.15 (Co), 1.4 (Cr), 0.15 (Cu), 2.5 (Ni), 2.5 (Pb) and 0.04 (Zn). Accuracy was checked by analyzing 4 certified reference materials and a good agreement for 95% confidence interval was found in both methods, with recoveries in the range of 94-106% in atomic absorption and 97-103% in optical emission. Repeatability found by analyzing real soil samples was in the range 1.6-5.2% in atomic absorption, similar with that of 1.9-6.1% in optical emission spectrometry. The Bland and Altman method showed no statistical significant difference between the two spectrometric methods for 95% confidence interval. CONCLUSIONS High-resolution continuum source flame atomic absorption spectrometry can be successfully used for the rapid, multielemental determination of hazardous/priority hazardous metals in soil with similar analytical performances to those in inductively coupled plasma optical emission spectrometry.
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Affiliation(s)
- Tiberiu Frentiu
- Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, 11 Arany Janos, 400028 Cluj-Napoca, Romania
| | - Michaela Ponta
- Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, 11 Arany Janos, 400028 Cluj-Napoca, Romania
| | - Raluca Hategan
- Regional Environmental Protection Agency, 99 Dorobantilor, 400609 Cluj-Napoca, Romania
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Dai J, Ren FL, Tao CY, Bai Y. Synthesis of cross-linked chitosan and application to adsorption and speciation of Se (VI) and Se (IV) in environmental water samples by inductively coupled plasma optical emission spectrometry. Int J Mol Sci 2011; 12:4009-20. [PMID: 21747721 PMCID: PMC3131605 DOI: 10.3390/ijms12064009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Revised: 05/29/2011] [Accepted: 06/09/2011] [Indexed: 11/29/2022] Open
Abstract
A new type of cross-linked chitosan was synthesized with Diethylene Triamine (DCCTS). The adsorption of Se (VI) on DCCTS was studied. The effect factors on adsorption and the adsorption mechanism were considered. The results indicated that the DCCTS could concentrate and separate Se (IV) at pH = 3.6; the maximum adsorption efficiency was 94%, the adsorption equilibrium time was 30 min; the maximum adsorption capacity was 42.7 mg/g; the adsorption fitted Langmuir equation. A novel method for speciation of Se (VI) and Se (IV) in environmental water samples has been developed using DCCTS as adsorbent and ICP–OES as determination means. The detection limit of this method was 12 ng/L, the relatively standard deviation was 4.5% and the recovery was 99%~104%.
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Affiliation(s)
- Jun Dai
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China; E-Mail:
- College of Chemistry and Chemical Engineering, Jiujiang University, Jiujiang, Jiangxi 332005, China; E-Mails: (C.Y.T.); (Y.B.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +86-792-8313635
| | - Feng Lian Ren
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China; E-Mail:
| | - Chun Yuan Tao
- College of Chemistry and Chemical Engineering, Jiujiang University, Jiujiang, Jiangxi 332005, China; E-Mails: (C.Y.T.); (Y.B.)
| | - Yang Bai
- College of Chemistry and Chemical Engineering, Jiujiang University, Jiujiang, Jiangxi 332005, China; E-Mails: (C.Y.T.); (Y.B.)
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Levine KE, Stout MD, Ross GT, Essader AS, Perlmutter JM, Grohse PM, Fernando RA, Lang M, Collins BJ. Validation of a Method for the Determination of Total Chromium in Rat Feces by Inductively Coupled Plasma Optical Emission Spectrometry. ANAL LETT 2009; 42:2729-2746. [PMID: 32494086 PMCID: PMC7269159 DOI: 10.1080/00032710902721931] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The validation of a method for the determination of total chromium in Fischer-344 rat feces by inductively coupled plasma optical emission spectrometry following a rapid, atmospheric-pressure microwave digestion is described. The performance of the method was evaluated over the concentration range of 5.00 to 200 μg Cr/g feces. Data for method linearity, accuracy, precision, digest stability, and storage stability are presented along with limit of detection and limit of quantitation data. Data from a cross-validation method for B6C3F1 mouse feces are also presented. Following validation, the method was applied to analyze samples collected in support of two chronic toxicological investigations.
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Affiliation(s)
- Keith E. Levine
- RTI International, Research Triangle Park, North Carolina, USA
| | - Matthew D. Stout
- National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | - Glenn T. Ross
- RTI International, Research Triangle Park, North Carolina, USA
| | - Amal S. Essader
- RTI International, Research Triangle Park, North Carolina, USA
| | | | - Peter M. Grohse
- RTI International, Research Triangle Park, North Carolina, USA
| | | | - Michelle Lang
- RTI International, Research Triangle Park, North Carolina, USA
| | - Bradley J. Collins
- National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
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