13 research outputs found
Toxic Metals (Pb and Cd) and Their Respective Antagonists (Ca and Zn) in Infant Formulas and Milk Marketed in Brasilia, Brazil
In non-ideal scenarios involving partial or non-breastfeeding, cow’s milk-based dairy products are mainstream in infant feeding. Therefore, it is important to study the concentrations of potentially neurotoxic contaminants (Pb and Cd) and their respective counteracting elements (Ca and Zn) in infant dairy products. Fifty-five brands of infant formulas and milk sold in Brasilia, Brazil were analyzed. The dairy products came from areas in the central-west (26%), southeast (29%) and south of Brazil (36%) extending as far as Argentina (7%) and the Netherlands (2%). For toxic Pb and Cd, median concentrations in powdered samples were 0.109 mg/kg and 0.033 mg/kg, respectively; in fluid samples median Pb concentration was 0.084 mg/kg, but median Cd concentration was below the limit of detection and overall values were below reference safety levels. However, 62% of these samples presented higher Pb concentration values than those established by FAO/WHO. Although the inverse correlation between Cd and Zn (Spearman r = −0.116; P = 0.590) was not statistically significant, the positive correlation between Ca and Pb was (Spearman r = 0.619; P < 0.0001). Additionally, there was a significant correlation between Pb and Cd. Furthermore, the study also revealed that provision of the essential trace element Zn in infant formulas can provide adequate amounts of the recommended daily requirements. Infant formulas and milk sold for consumption by infants and children can be an efficient tool to monitor neurotoxic metal risk exposure among young children
Method Validation for Determination of Cadmium and Lead in Offal by Means of Quadrupole Inductively Coupled Plasma Mass Spectrometry
Effect of Doubly Charged Ions in Forming the Mass Spectra of Solid-State Substances in a Mass Spectrometer with Inductively Coupled Plasma
Tailoring of nanostructured material as an electrochemical sensor and sorbent for toxic Cd(II) ions from various real samples
Assessment of arsenic in Australian grown and imported rice varieties on sale in Australia and potential links with irrigation practises and soil geochemistry
Ultrasensitive Trace Determination of Cadmium Through a Green Synthesized Hybrid PVA-Chitosan Nanocomposite
Trace metals in Ganges soft-shell turtle (Aspideretes gangeticus) from two barrage: Baloki and Rasul, Pakistan
Nanomaterials in electrochemical biosensors for pesticide detection: advances and challenges in food analysis
This overview (with 114 refs.) covers the progress
made between 2010 and 2015 in the field of nanomaterial
based electrochemical biosensors for pesticides in food. Its
main focus is on strategies to analyze real samples. The review
first gives a short introduction into the most often used
biorecognition elements. These include (a) enzymes (resulting
in inhibition-based and direct catalytic biosensors), (b) antibodies
(resulting in immunosensors), and (c) aptamers
(resulting in aptasensors). The next main section covers the
various kinds of nanomaterials for use in biosensors and includes
carbonaceous species (carbon nanotubes, graphene,
carbon black and others), and non-carbonaceous species in
the form of nanoparticles, rods, or porous materials. Aspects
of sample treatment and real sample analysis are treated next
before discussing vanguard technologies in tailor-made food
analysis