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Zhong X, Zhan W, Ma L, Yin G. Trace detection of cadmium (II) ions based on an excessively tilted fiber grating. OPTICS EXPRESS 2024; 32:15851-15861. [PMID: 38859225 DOI: 10.1364/oe.521146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 04/04/2024] [Indexed: 06/12/2024]
Abstract
Cadmium (Cd2+) ion is one of the most crucial industrial pollutants that cause serious harm to the human body. We proposed and experimentally demonstrated a highly sensitive Cd2+ sensor based on hydrogel coated excessively tilted fiber grating. The hydrogel with the functional monomer of the allyl thiourea can specifically bind to Cd2+, and hence forming a complex. The grating excites high order cladding modes, and ensures a sufficient interaction between the light and hydrogel binding to Cd2+, providing highly sensitive monitoring. The results show that the sensor can detect 0-160 pM Cd2+ in aqueous solution. The maximum sensitivity is 10600 nm/µM, and the minimum detection concentration is 20 pM (about 0.004 ppb), which is much less than that of the international standard (3 ppb). The proposed sensor exhibits high sensitivity, ultra-low detection limit, specificity, and a compact structure, offering potential as a tool for Cd2+ detection in aqueous solution.
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Martín-Carrasco I, Carbonero-Aguilar P, Dahiri B, Moreno IM, Hinojosa M. Comparison between pollutants found in breast milk and infant formula in the last decade: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 875:162461. [PMID: 36868281 DOI: 10.1016/j.scitotenv.2023.162461] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 02/03/2023] [Accepted: 02/21/2023] [Indexed: 06/18/2023]
Abstract
Since ancient times, breastfeeding has been the fundamental way of nurturing the newborn. The benefits of breast milk are widely known, as it is a source of essential nutrients and provides immunological protection, as well as developmental benefits, among others. However, when breastfeeding is not possible, infant formula is the most appropriate alternative. Its composition meets the nutritional requirements of the infant, and its quality is subject to strict control by the authorities. Nonetheless, the presence of different pollutants has been detected in both matrices. Thus, the aim of the present review is to make a comparison between the findings in both breast milk and infant formula in terms of contaminants in the last decade, in order to choose the most convenient option depending on the environmental conditions. For that, the emerging pollutants including metals, chemical compounds derived from heat treatment, pharmaceutical drugs, mycotoxins, pesticides, packaging materials, and other contaminants were described. While in breast milk the most concerning contaminants found were metals and pesticides, in infant formula pollutants such as metals, mycotoxins, and packaging materials were the most outstanding. In conclusion, the convenience of using a feeding diet based on breast milk or either infant formula depends on the maternal environmental circumstances. However, it is important to take into account the immunological benefits of the breast milk compared to the infant formula, and the possibility of using breast milk in combination with infant formula when the nutritional requirements are not fulfilled only with the intake of breast milk. Therefore, more attention should be paid in terms of analyzing these conditions in each case to be able to make a proper decision, as it will vary depending on the maternal and newborn environment.
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Affiliation(s)
- I Martín-Carrasco
- Area of Toxicology, Faculty of Pharmacy, University of Sevilla, C/ Profesor García González 2, 41012 Seville, Spain
| | - P Carbonero-Aguilar
- Area of Toxicology, Faculty of Pharmacy, University of Sevilla, C/ Profesor García González 2, 41012 Seville, Spain
| | - B Dahiri
- Area of Toxicology, Faculty of Pharmacy, University of Sevilla, C/ Profesor García González 2, 41012 Seville, Spain
| | - I M Moreno
- Area of Toxicology, Faculty of Pharmacy, University of Sevilla, C/ Profesor García González 2, 41012 Seville, Spain.
| | - M Hinojosa
- Area of Toxicology, Faculty of Pharmacy, University of Sevilla, C/ Profesor García González 2, 41012 Seville, Spain; Department of Biochemistry and Biophysics, Stockholm University, Institutionen för biokemi och biofysik, 106 91 Stockholm, Sweden
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Gómez-Nieto B, Isabel-Cabrera C, Gismera MJ, Sevilla MT, Procopio JR, Sánchez de Rojas MI. An environmentally friendly approach for the characterization of construction materials: determination of trace, minor, and major elements by slurry sampling high-resolution continuum source graphite furnace atomic absorption spectrometry. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:1105-1115. [PMID: 36786775 DOI: 10.1039/d2ay02036j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
A slurry sampling method was developed for the fast determination of Pb, Ni, Fe, and Mn in construction materials by high-resolution continuum source graphite furnace atomic absorption spectrometry (HR-CS GFAAS). For sample introduction into the GF, stable slurries were prepared by sonicating 10 mg of ground solid sample in 10.0 mL of 1% (v/v) Triton X-100 and 1% (v/v) HNO3 solution for 1.0 min. The determination of the four elements was carried out in three measurement runs, with Ni and Fe being determined simultaneously. The HR-CS GFAAS measurements were performed using analytical lines with adequate sensitivity, considering the content of each element in the material: Pb at 283.306 nm (42%), Mn at 403.080 nm (6.7%), Ni at 232.003 nm (100%) and Fe at 232.036 nm (1.4%). The pyrolysis and atomization temperatures and the use of chemical modifiers were optimized using both aqueous standards and slurry samples. At optimal conditions, samples with concentrations of Pb from 1.5 to 80 μg g-1, Ni from 4.0 to 75 μg g-1, Mn from 2.0 to 600 μg g-1, and Fe from 0.15 to 60 mg g-1 could be determined using a unique sample suspension. To assess the validity of the method, a fly ash certified reference material (CRM) was analysed using the slurry sampling HR-CS GFAAS method; this CRM and the construction material samples were also analysed by HR-CS GFAAS after the digestion of the samples. The obtained results using both methods were statistically comparable (Student's paired t-test for two independent methods at a 95% confidence level) demonstrating the suitability of the proposed method.
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Affiliation(s)
- Beatriz Gómez-Nieto
- Departamento de Química Analítica y Análisis Instrumental, Facultad de Ciencias Universidad Autónoma de Madrid, Avda. Francisco Tomás y Valiente 7, Madrid 28049, Spain.
| | - Carmen Isabel-Cabrera
- Departamento de Química Analítica y Análisis Instrumental, Facultad de Ciencias Universidad Autónoma de Madrid, Avda. Francisco Tomás y Valiente 7, Madrid 28049, Spain.
| | - María Jesús Gismera
- Departamento de Química Analítica y Análisis Instrumental, Facultad de Ciencias Universidad Autónoma de Madrid, Avda. Francisco Tomás y Valiente 7, Madrid 28049, Spain.
| | - María Teresa Sevilla
- Departamento de Química Analítica y Análisis Instrumental, Facultad de Ciencias Universidad Autónoma de Madrid, Avda. Francisco Tomás y Valiente 7, Madrid 28049, Spain.
| | - Jesús R Procopio
- Departamento de Química Analítica y Análisis Instrumental, Facultad de Ciencias Universidad Autónoma de Madrid, Avda. Francisco Tomás y Valiente 7, Madrid 28049, Spain.
| | - María Isabel Sánchez de Rojas
- Departamento de Cementos y Reciclado de Materiales, Instituto de Ciencias de la Construcción Eduardo Torroja (IETcc-CSIC), C/Serrano Galvache 4, Madrid 28033, Spain
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Ultrasonic-assisted d-µ-SPE based on amine-functionalized KCC-1 for trace detection of lead and cadmium ion by GFAAS. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Fast Detection of Cadmium in Chocolate by Solid Sampling Electrothermal Vaporization Atomic Absorption Spectrometry and Its Application on Dietary Exposure Risk Assessment. Molecules 2022; 27:molecules27196197. [PMID: 36234728 PMCID: PMC9572000 DOI: 10.3390/molecules27196197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 09/14/2022] [Accepted: 09/19/2022] [Indexed: 12/04/2022] Open
Abstract
In this work, a rapid detection method using solid sampling electrothermal vaporization atomic absorption spectrometry (SS-ETV-AAS) was established for cadmium in chocolate. The instrumental system includes a solid sampling ETV unit, a catalytic pyrolysis furnace, an AAS detector, and a gas supply system with only an air pump and a hydrogen generator. Herein, MgO material with 1.0−1.5 mm particle size was first employed to replace the kaolin filler previously used to further shorten the peak width and to thereby improve the sensitivity. With 350 mL/min of air, a chocolate sample was heated for 25 s from 435 to 464 °C to remove water and organic matrices; then, after supplying 240 mL/min hydrogen and turning down air to 120 mL/min, a N2/H2 mixture gas was formed to accelerate Cd vaporization from chocolate residue under 465 to 765 °C. Under the optimized conditions, the detection limit (LOD) was obviously lowered to 70 pg/g (vs. previous 150 pg/g) with R2 > 0.999; the relative standard deviations (RSD) of repeated measurements for real chocolate samples ranged from 1.5% to 6.4%, indicating a favorable precision; and the Cd recoveries were in the range of 93−107%, proving a satisfied accuracy. Thus, the total analysis time is less than 3 min without the sample digestion process. Thereafter, 78 chocolate samples with different brands from 9 producing countries in China market were collected and measured by this proposed method. Based on the measured Cd concentrations, a dietary exposure assessment was performed for Chinese residents, and the target hazard quotient (THQ) values are all less than 1, proving no significant health risk from intaking chocolate cadmium for Chinese residents.
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Bustos DE, Toro JA, Briceño M, Rivas RE. Use of slow atomization ramp in high resolution continuum source graphite furnace atomic absorption spectrometry for the simultaneous determination of Cd and Ni in slurry powdered chocolate samples. Talanta 2022; 247:123547. [DOI: 10.1016/j.talanta.2022.123547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 05/11/2022] [Accepted: 05/12/2022] [Indexed: 11/28/2022]
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Elashery SEA, Oh H. Exploitation of 2D Cu-MOF nanosheets as a unique electroactive material for ultrasensitive Cu(II) ion estimation in various real samples. Anal Chim Acta 2021; 1181:338924. [PMID: 34556233 DOI: 10.1016/j.aca.2021.338924] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 07/11/2021] [Accepted: 08/07/2021] [Indexed: 01/17/2023]
Abstract
Herein, hybrid carbon sensor has been developed with graphite sheets as a matrix, tricresyl phosphate (TCP) as a plasticizer and nanosheets of 2D Cu-MOF (metal-organic framework) as an electroactive material for the ultrasensitive Cu(II) ion detection in various real samples. Where, the present study proves the efficiency of 2D Cu-MOF as a promising sensing material for the development of Cu(II) ion selective carbon sensor. The developed 2D Cu-MOF nanosheets based sensor containing 2D Cu-MOF: TCP: graphite in the ratio of 2.67: 30.54: 66.79 (% wt/wt) displayed unique Nernstian behavior over two linearity ranges of 1.0 × 10-11-1.0 × 10-9 and 1.0 × 10-5-1.0 × 10-1 mol L-1 with slopes of 29.5 ± 0.25 and 29.6 ± 0.13 mV decade-1, respectively. The fabricated carbon sensor achieved a widely pH independency, fast response time and superior thermal stability with highly selective and ultrasensitive performance. Moreover, It has been efficiently applied for the Cu(II) ion potentiometric estimation in human hair, sesames seeds, two different tea infusions and tap water real samples.
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Affiliation(s)
- Sally E A Elashery
- Chemistry Department, Faculty of Science, Cairo University, Gamaa Str., 12613, Giza, Egypt.
| | - Hyunchul Oh
- Department of Energy Engineering, Gyeongsang National University (GNU), Jinju, Gyeongnam, 52849, Republic of Korea; Future Convergence Technology Research Institute, Gyeongsang National University (GNU), Junju, 52725, Republic of Korea
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Öner M, Bodur S, Demir C, Yazıcı E, Erarpat S, Bakırdere S. An effective and rapid magnetic nanoparticle based dispersive solid phase extraction method for the extraction and preconcentration of cadmium from edible oil samples before ICP OES measurement. J Food Compost Anal 2021. [DOI: 10.1016/j.jfca.2021.103978] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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