scholarly journals Chemical Characterization and Quantification of Titanium Dioxide Nanoparticles (TiO2-NPs) in Seafood by Single-Particle ICP-MS: Assessment of Dietary Exposure

Author(s):  
Alfina Grasso ◽  
Margherita Ferrante ◽  
Pietro Zuccarello ◽  
Tommaso Filippini ◽  
Giovanni Arena ◽  
...  

The significant increase in the production and variety of nanoparticles (NPs) has led to their release into the environment, especially into the marine environment. Titanium dioxide nanoparticles (TiO2-NPs) are used in different industrial sectors, from the food industry to several consumer and household products. Since the aquatic environment is highly sensitive to contamination by TiO2-NPs, this work aimed to give a preliminary assessment of the contamination of packaged seafood, where the food additive TiO2 (E171) is not to be intentionally added. This allowed providing a chemical characterization and quantification of TiO2-NPs in processed canned fish products belonging to different trophic positions of the pelagic compartment and in canned clam. The new emerging technique called single-particle inductively coupled plasma mass spectrometry (spICP-MS) was applied, which allows the determination of nanoparticle number-based concentration, as well as the dissolved titanium. This study highlights how processed food, where the pigment E171 was not intentionally added, contains TiO2 in its nanoparticle form, as well as dissolved titanium. Processed clam represented the seafood with the highest content of TiO2-NPs. In pelagic fish species, we found progressively higher levels and smaller sizes of TiO2-NPs from smaller to larger fish. Our results highlight the importance of planning the characterization and quantification of TiO2-NPs in food both processed and not, as well as where the pigment E171 is intentionally added and not, as it is not the only source of TiO2-NPs. This result represents a solid step toward being able to estimate the real level of dietary exposure to TiO2-NPs for the general population and the related health risks.

Talanta ◽  
2022 ◽  
Vol 236 ◽  
pp. 122856
Author(s):  
Juan José López-Mayán ◽  
Sergio del-Ángel-Monroy ◽  
Elena Peña-Vázquez ◽  
María Carmen Barciela-Alonso ◽  
Pilar Bermejo-Barrera ◽  
...  

2017 ◽  
Vol 32 (11) ◽  
pp. 2140-2152 ◽  
Author(s):  
Eduardo Bolea-Fernandez ◽  
Diego Leite ◽  
Ana Rua-Ibarz ◽  
Lieve Balcaen ◽  
Maite Aramendía ◽  
...  

The development of an ICP-MS/MS method for interference-free Si determination allows for chemical characterization of SiO2nanoparticles.


2021 ◽  
Vol 4 (1) ◽  
pp. 1-21
Author(s):  
Bogdan Andreii Miu ◽  
Anca Dinischiotu

In the green synthesis of titanium dioxide nanoparticles (TiO2 NPs) chemical reagents are replaced with biological extracts. Conventional methods used in the manufacture of TiO2 NPs raise environmental issues as they use harmful chemicals and spend a high amount of energy. At a laboratory scale, biologically synthesized titanium dioxide nanoparticles (bio-TiO2 NPs) proved to be a suitable alternative to the chemically synthesized ones. The biological activity of NPs is mainly determined by their shape, size and crystalline structure. However, these characteristics are hardly controlled when natural sources of reagents are used and so bio-TiO2 NPs did not reach an advanced technology readiness level. In this paper, we reviewed the majority of the available studies referring to bio-TiO2 NPs. Our aim is to briefly present the efficiency of biochemicals from different living organisms in producing TiO2 nano-scale particles as well as the benefits bio-TiO2 NPs would bring to the biomedical, agricultural and industrial sectors. Finally, based on the available data we discuss the sustainability of bio-TiO2 NPs referring to their possible environmental, economic and societal impacts.


2019 ◽  
Vol 20 (2) ◽  
pp. 516-528
Author(s):  
Deogratius T. Maiga ◽  
Bhekie B. Mamba ◽  
Titus A. M. Msagati

Abstract This paper reports the results of a study on the analysis and characterization of titanium dioxide (TiO2) nanoparticles (NPs) in samples that were collected from selected freshwater dams in South Africa. The study employed a combination of complementary techniques to ascertain the analytical procedures and the occurrence of TiO2 NPs in water. Characterization, identification and quantification of TiO2 NPs in surface water samples from five sampled dams was performed using several techniques including scanning electron microscopy-energy dispersive X-ray (SEM-EDX), fluorescence excitation–emission matrix (FEEM) and single particle inductively coupled plasma mass spectroscopy (SP-ICP-MS). The SP-ICP-MS technique was able to simultaneously determine the size and concentration of both the dissolved and particulate titanium (Ti) in water samples. The Ti-containing NPs were found at concentrations ranging from 8.3 × 104 parts/mL to 1.4 × 105 parts/mL in the presence of 14.9 μg/L to 243 μg/L dissolved Ti. The TiO2 nanoparticles were mostly composed of small agglomerates ranging from 102.9 nm to 158.9 nm in size.


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