Simultaneous determination of iron and nickel as contaminants in multimineral and multivitamin supplements by solid sampling HR-CS GF AAS

Adolfo, Franciéle Rovasi; Nascimento, Paulo Cı́cero do; Leal, Gabriela; Bohrer, Denise; Viana, Carine; Carvalho, Leandro Machado de; Colim, Alexsandro Nunes

doi:10.1016/j.talanta.2018.12.010

Cited by 27 publications

(8 citation statements)

References 35 publications

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“…Nickel is present in some multivitamins as a contaminant. 57 The inverse associations of multivitamin use with cobalt and selenium are unexpected given that these metals may be components of multivitamins.…”

Section: Discussionmentioning

confidence: 99%

Correlates of whole blood metal concentrations among reproductive-aged Black women

Geller

Wesselink

Upson

et al. 2022

J Expo Sci Environ Epidemiol

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Background: Metals may influence reproductive health, but few studies have investigated correlates of metal body burden among reproductive-aged women outside of pregnancy. Furthermore, while there is evidence of racial disparities in exposure to metals among U.S. women, there is limited research about correlates of metal body burden among Black women. Objective: To identify correlates of whole blood metal concentrations among reproductive-aged Black women. Methods: We analyzed cross-sectional data from a cohort of 1,664 Black women aged 23–35 years in Detroit, Michigan, 2010–2012. We collected blood samples and questionnaire data. We measured concentrations of 17 metals in whole blood using inductively-coupled plasma-mass spectrometer-triple quadrupole and total mercury using Direct Mercury Analyzer-80. We used multivariable linear regression models to identify sociodemographic, environmental, reproductive, and dietary correlates of individual metal concentrations. Results: In adjusted models, age was positively associated with multiple metals, including arsenic, cadmium, and mercury. Education and income were inversely associated with cadmium and lead. Current smoking was strongly, positively associated with cadmium and lead. Alcohol intake in the past year was positively associated with arsenic, barium, copper, lead, mercury, vanadium, and zinc. Having pumped gasoline in the past 24 hours was positively associated with cadmium, chromium, and molybdenum. Having lived in an urban area for the majority of residence in Michigan was positively associated with arsenic, lead, and nickel. Higher water intake in the past year was positively associated with several metals, including lead. Fish intake in the past year was positively associated with arsenic, cesium, and mercury. We also observed associations with body mass index, season, and other environmental, reproductive, and dietary factors. Significance: We identified potential sources of exposure to metals among reproductive-aged Black women. Our findings improve understanding of exposures to metals among non-pregnant reproductive-aged women, and can inform policies in support of reducing disparities in exposures.

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Section: Discussionmentioning

confidence: 99%

Correlates of whole blood metal concentrations among reproductive-aged Black women

Geller

Wesselink

Upson

et al. 2022

J Expo Sci Environ Epidemiol

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“…LoQ is the lowest concentration of analyte that can be measured with acceptable precision and accuracy. The ten times standard deviation from the measuring the blank signal (n = 21) divided to the slope of calibration curves was used to calculate the LoQs [20,39]. The calculated LoQ for Cd was 0.50 ng mL −1 , corresponding to a concentration in a solid sample of 0.10 mg kg −1 , while, for Pb, the calculated LoD was 2.13 ng mL −1 , corresponding to a value of 0.43 mg kg −1 in the solid sample.…”

Section: Evaluation Of Lods and Loqsmentioning

confidence: 99%

Development and Validation of a Spectrometric Method for Cd and Pb Determination in Zeolites and Safety Evaluation

Șenilă

Cadar

Miu³

2020

Molecules

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An analytical method based on microwave-assisted acid digestion and atomic absorption spectrometry with graphite furnace as atomization source was developed and validated for determining trace elements (Cd and Pb) in zeolites used as dietary supplements, for their characterization and safety evaluation. The method was checked for the main performance parameters according to the legislation requirements in the field of dietary supplements. In all cases, the obtained performance parameters were satisfactory. The selectivity study showed no significant non-spectral matrix effect. The linearity study was conducted for the calibration curves in the range of 0–10 ng mL−1 for Cd and 0–30 ng mL−1 for Pb. The obtained limits of detection (LoDs) and the limits of quantification (LoQs) were sufficiently low in order to allow Pb and Cd determination in dietary supplements. For the internal quality control, certified reference materials were analysed and good recoveries were obtained. The precision study was performed in terms of repeatability and reproducibility, considering the requirements imposed by the Commission Decision (2007/333/EC) and the method fulfilled these performance parameters. Expanded measurement uncertainties were estimated to 11% for Cd and 10% for Pb. Cd and Pb content were measured in real zeolite samples and, using these data, a safety evaluation was carried out.

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“…To date, numerous technical methods have been conceived to realize the quantification of iron, such as inductively coupled plasma–mass spectrometry, colorimetry, fluorometry, ,, atomic absorption spectrum, and so on. However, these methods often rely on trained operators, expensive equipment, and tedious preprocessing, despite providing accurate and satisfactory results.…”

Section: Introductionmentioning

confidence: 99%

Vertical Silica Nanochannels and o-Phenanthroline Chelator for the Detection of Trace Fe(II)

Huang,

Fan,

Yan

et al. 2024

ACS Appl. Nano Mater.

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Herein, we develop a simple electrochemical sensor based on the confinement effect of vertically ordered mesoporous silica film (VMSF) and the o-phenanthroline (Phen) chelating agent for ultrasensitive determination of ferrous ions (Fe 2+ ). Fe(Phen) 3 2+ obtained from the chelation between Fe 2+ and Phen, shows higher electrochemical activity and larger geometric dimensions compared with free Fe 2+ , which could be effectively preconcentrated into the inner nanochannels of VMSF through spatial and electrostatic confinement effects. Differing from the conventional anodic stripping voltammetry, Fe(Phen) 3 2+ could be enriched by convenient mechanical stirring and further detected by VMSF-modified indium tin oxide (VMSF/ITO), achieving an outstanding detection performance in terms of a linear range (1.0 nM−13.0 μM) and a limit of detection (LOD, 0.66 nM). Moreover, the established electrochemical sensor can accurately measure total iron and distinguish between different valence states (Fe 2+ or Fe 3+ ) with the help of reducing agents. Thanks to the outstanding antifouling ability of VMSF, the sensing platform consisting of VMSF/ITO and Phen chelating agent enables the precise determination of Fe 2+ in complex real samples including tap water, pond water, FeSO 4 tablets, and even colored samples, which can avoid the tedious sample pretreatment process and be applied in a wide range of scenarios.

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Simultaneous determination of iron and nickel as contaminants in multimineral and multivitamin supplements by solid sampling HR-CS GF AAS

Cited by 27 publications

References 35 publications

Correlates of whole blood metal concentrations among reproductive-aged Black women

Correlates of whole blood metal concentrations among reproductive-aged Black women

Development and Validation of a Spectrometric Method for Cd and Pb Determination in Zeolites and Safety Evaluation

Vertical Silica Nanochannels and o-Phenanthroline Chelator for the Detection of Trace Fe(II)

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