Evaluation of a cloud point extraction approach for the preconcentration and quantification of trace CuO nanoparticles in environmental waters

Majedi, Seyed Mohammad; Kelly, Barry C.; Lee, Hian Kee

doi:10.1016/j.aca.2014.01.022

Cited by 58 publications

(28 citation statements)

References 58 publications

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“…A recent evaluation of CPE demonstrated that the method is sufficiently robust and can be optimized for pre-concentration of EINP with detection limits for CuO NP of 0.02 to 0.06 μg L −1 . CPE yielded recoveries in river and wastewater samples above 60% (Majedi et al, 2014). Digestion of EINP is important when the analytical technique cannot measure particulate analytes as, for instance, relevant for inductively coupled plasmaoptical emission spectroscopy (ICP-OES) (Fabricius et al, 2014).…”

Section: Sample Preparation Nanoparticle Extraction and Enrichment Mmentioning

confidence: 99%

Understanding the fate and biological effects of Ag- and TiO2-nanoparticles in the environment: The quest for advanced analytics and interdisciplinary concepts

Schaumann

Philippe

Bundschuh

et al. 2015

Science of The Total Environment

175

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Section: Sample Preparation Nanoparticle Extraction and Enrichment Mmentioning

confidence: 99%

Understanding the fate and biological effects of Ag- and TiO2-nanoparticles in the environment: The quest for advanced analytics and interdisciplinary concepts

Schaumann

Philippe

Bundschuh

et al. 2015

Science of The Total Environment

175

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“…Thus, an excellent probe 2-(2-(anthracen-10-yl)-1H-naphtho [2,3-d]imidazol-1-yl) ethyl-p-toluenesulfonate (ANITS) superior in above aspects is more competent to this work. On the other hand, for a small amount of analytes in complex matrices, trace analysis technique is playing increasingly important role by bringing about simple, efficient, inexpensive and environmentally friendly pretreatment compatible with many instruments [39][40][41]. Therefore, combining the ultrasonic-assisted trace extraction with the in-syringe derivatization [42,43] in closed system as a novel pretreatment technique for HPLC will make it possible to establish the desired method.…”

Section: Introductionmentioning

confidence: 99%

Development of ultrasonic-assisted closed in-syringe extraction and derivatization for the determination of labile abietic acid and dehydroabietic acid in cosmetics

Liu

et al. 2014

Journal of Chromatography A

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“…On the other hand, cloud point extraction (CPE) using Triton X-114 (TX-114) was first described and developed for the analysis of trace NPs, such as gold, silver, and copper as particle forms [28][29][30]. TX-114 is a surfactant, is cost-effective, and has the advantage of forming micelles at room temperature (20-25 • C), contributing to easy manipulation.…”

Section: Introductionmentioning

confidence: 99%

Fate Determination of ZnO in Commercial Foods and Human Intestinal Cells

Jeon

Jin

Choi

2020

IJMS

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(1) Background: Zinc oxide (ZnO) particles are widely used as zinc (Zn) fortifiers, because Zn is essential for various cellular functions. Nanotechnology developments may lead to production of nano-sized ZnO, although nanoparticles (NPs) are not intended to be used as food additives. Current regulations do not specify the size distribution of NPs. Moreover, ZnO is easily dissolved into Zn ions under acidic conditions. However, the fate of ZnO in commercial foods or during intestinal transit is still poorly understood. (2) Methods: We established surfactant-based cloud point extraction (CPE) for ZnO NP detection as intact particle forms using pristine ZnO-NP-spiked powdered or liquid foods. The fate determination and dissolution characterization of ZnO were carried out in commercial foods and human intestinal cells using in vitro intestinal transport and ex vivo small intestine absorption models. (3) Results: The results demonstrated that the CPE can effectively separate ZnO particles and Zn ions in food matrices and cells. The major fate of ZnO in powdered foods was in particle form, in contrast to its ionic fate in liquid beverages. The fate of ZnO was closely related to the extent of its dissolution in food or biomatrices. ZnO NPs were internalized into cells in both particle and ion form, but dissolved into ions with time, probably forming a Zn–ligand complex. ZnO was transported through intestinal barriers and absorbed in the small intestine primarily as Zn ions, but a small amount of ZnO was absorbed as particles. (4) Conclusion: The fate of ZnO is highly dependent on food matrix type, showing particle and ionic fates in powdered foods and liquid beverages, respectively. The major intracellular and intestinal absorption fates of ZnO NPs were Zn ions, but a small portion of ZnO particle fate was also observed after intestinal transit. These findings suggest that the toxicity of ZnO is mainly related to the Zn ion, but potential toxicity resulting from ZnO particles cannot be completely excluded.

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Evaluation of a cloud point extraction approach for the preconcentration and quantification of trace CuO nanoparticles in environmental waters

Cited by 58 publications

References 58 publications

Understanding the fate and biological effects of Ag- and TiO2-nanoparticles in the environment: The quest for advanced analytics and interdisciplinary concepts

Understanding the fate and biological effects of Ag- and TiO2-nanoparticles in the environment: The quest for advanced analytics and interdisciplinary concepts

Development of ultrasonic-assisted closed in-syringe extraction and derivatization for the determination of labile abietic acid and dehydroabietic acid in cosmetics

Fate Determination of ZnO in Commercial Foods and Human Intestinal Cells

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