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Nanomaterials in consumer products: a challenging analytical problem.

Contado C - Front Chem (2015)

Bottom Line: Many products used in everyday life are made with the assistance of nanotechnologies.This information implies transversal studies and a number of different competences.More work should be done to produce standardized materials and to set-up methodologies to determine number-based size distributions and to get quantitative date about the NPs in such a complex matrices.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical and Pharmaceutical Sciences, University of Ferrara Ferrara, Italy.

ABSTRACT
Many products used in everyday life are made with the assistance of nanotechnologies. Cosmetic, pharmaceuticals, sunscreen, powdered food are only few examples of end products containing nano-sized particles (NPs), generally added to improve the product quality. To evaluate correctly benefits vs. risks of engineered nanomaterials and consequently to legislate in favor of consumer's protection, it is necessary to know the hazards connected with the exposure levels. This information implies transversal studies and a number of different competences. On analytical point of view the identification, quantification and characterization of NPs in food matrices and in cosmetic or personal care products pose significant challenges, because NPs are usually present at low concentration levels and the matrices, in which they are dispersed, are complexes and often incompatible with analytical instruments that would be required for their detection and characterization. This paper focused on some analytical techniques suitable for the detection, characterization and quantification of NPs in food and cosmetics products, reports their recent application in characterizing specific metal and metal-oxide NPs in these two important industrial and market sectors. The need of a characterization of the NPs as much as possible complete, matching complementary information about different metrics, possible achieved through validate procedures, is what clearly emerges from this research. More work should be done to produce standardized materials and to set-up methodologies to determine number-based size distributions and to get quantitative date about the NPs in such a complex matrices.

No MeSH data available.


Related in: MedlinePlus

(A) Possible external dimensions of an irregular aggregate; (B) different diameter expressions when an irregular particle is approximate to a sphere, (C) diameter of a sphere that has the same inertia of rotation, and (D) diameter of the circle causing the same electro-shadow area (Linsinger et al., 2013).
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Figure 1: (A) Possible external dimensions of an irregular aggregate; (B) different diameter expressions when an irregular particle is approximate to a sphere, (C) diameter of a sphere that has the same inertia of rotation, and (D) diameter of the circle causing the same electro-shadow area (Linsinger et al., 2013).

Mentions: The term “particle size” it is a challenge itself, since unless particles are perfect spheres, which is rarely the case, every non-spherical particle can be characterized by multiple “sizes,” and these sizes may differ between the dried or dispersed state of a particle (Linsinger et al., 2012) (Figure 1). All methods for particle size analysis target one of these sizes, i.e., each method measures fundamentally different parameters, rendering the measured sizes method-defined properties (Roebben et al., 2010). The term “size of a particle” is so meaningless without specification of the type of size (e.g., hydrodynamic diameter) and the method used to obtain this size information (Linsinger et al., 2013). As a consequence, average sizes and size distributions obtained with different methods might disagree because of the different physical principles behind the measurement and the sample preparation procedure required for the measurement.


Nanomaterials in consumer products: a challenging analytical problem.

Contado C - Front Chem (2015)

(A) Possible external dimensions of an irregular aggregate; (B) different diameter expressions when an irregular particle is approximate to a sphere, (C) diameter of a sphere that has the same inertia of rotation, and (D) diameter of the circle causing the same electro-shadow area (Linsinger et al., 2013).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4527077&req=5

Figure 1: (A) Possible external dimensions of an irregular aggregate; (B) different diameter expressions when an irregular particle is approximate to a sphere, (C) diameter of a sphere that has the same inertia of rotation, and (D) diameter of the circle causing the same electro-shadow area (Linsinger et al., 2013).
Mentions: The term “particle size” it is a challenge itself, since unless particles are perfect spheres, which is rarely the case, every non-spherical particle can be characterized by multiple “sizes,” and these sizes may differ between the dried or dispersed state of a particle (Linsinger et al., 2012) (Figure 1). All methods for particle size analysis target one of these sizes, i.e., each method measures fundamentally different parameters, rendering the measured sizes method-defined properties (Roebben et al., 2010). The term “size of a particle” is so meaningless without specification of the type of size (e.g., hydrodynamic diameter) and the method used to obtain this size information (Linsinger et al., 2013). As a consequence, average sizes and size distributions obtained with different methods might disagree because of the different physical principles behind the measurement and the sample preparation procedure required for the measurement.

Bottom Line: Many products used in everyday life are made with the assistance of nanotechnologies.This information implies transversal studies and a number of different competences.More work should be done to produce standardized materials and to set-up methodologies to determine number-based size distributions and to get quantitative date about the NPs in such a complex matrices.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical and Pharmaceutical Sciences, University of Ferrara Ferrara, Italy.

ABSTRACT
Many products used in everyday life are made with the assistance of nanotechnologies. Cosmetic, pharmaceuticals, sunscreen, powdered food are only few examples of end products containing nano-sized particles (NPs), generally added to improve the product quality. To evaluate correctly benefits vs. risks of engineered nanomaterials and consequently to legislate in favor of consumer's protection, it is necessary to know the hazards connected with the exposure levels. This information implies transversal studies and a number of different competences. On analytical point of view the identification, quantification and characterization of NPs in food matrices and in cosmetic or personal care products pose significant challenges, because NPs are usually present at low concentration levels and the matrices, in which they are dispersed, are complexes and often incompatible with analytical instruments that would be required for their detection and characterization. This paper focused on some analytical techniques suitable for the detection, characterization and quantification of NPs in food and cosmetics products, reports their recent application in characterizing specific metal and metal-oxide NPs in these two important industrial and market sectors. The need of a characterization of the NPs as much as possible complete, matching complementary information about different metrics, possible achieved through validate procedures, is what clearly emerges from this research. More work should be done to produce standardized materials and to set-up methodologies to determine number-based size distributions and to get quantitative date about the NPs in such a complex matrices.

No MeSH data available.


Related in: MedlinePlus