Title

Characterization of Gold Nanoparticle Uptake by Tomato Plants using Enzymatic Extraction Followed by Single-Particle Inductively Coupled Plasma-Mass Spectrometry Analysis

Abstract

Plant uptake and accumulation of nanoparticles (NPs) represent an important pathway for potential human expose to NPs. Consequently, it is imperative to understand the uptake of accumulation of NPs in plant tissues and their unique physical and chemical properties within plant tissues. Current technologies are limited in revealing the unique characteristics of NPs after they enter plant tissues. An enzymatic digestion method, followed by single-particle inductively coupled plasma-mass spectrometry (SP-ICP-MS) analysis, was developed for simultaneous determination of gold NP (AuNP) size, size distribution, particle concentration, and dissolved Au concentration in tomato plant tissues. The experimental results showed that Macerozyme R-10 enzyme was capable of extracting AuNPs from tomato plants without causing dissolution or aggregation of AuNPs. The detection limit for quantification of AuNP size was 20 nm, and the AuNP particle concentration detection limit was 1000 NPs/mL. The particle concentration recoveries of spiked AuNPs were high (79-96%) in quality control samples. The developed SP-ICP-MS method was able to accurately measure AuNP size, size distribution, and particle concentration in the plant matrix. The dosing study indicated that tomato can uptake AuNPs as intact particles without alternating the AuNP properties.

Department(s)

Chemistry

Keywords and Phrases

Fruits; Gold; Histology; Inductively coupled plasma; Inductively coupled plasma mass spectrometry; Mass spectrometers; Mass spectrometry; Nanoparticles; Quality control; Size distribution; Spectrometry; Tissue, Current technology; Enzymatic digestions; Enzymatic extraction; Gold Nanoparticles; Nanoparticle (NPs); Particle concentrations; Physical and chemical properties; Simultaneous determinations, Particle size analysis, gold nanoparticle; gold; metal nanoparticle, biological uptake; enzyme activity; fruit; gold; inductively coupled plasma method; nanotechnology; physicochemical property; pollution exposure; quality control; size distribution, Article; controlled study; dissolution; light intensity; limit of detection; mass spectrometry; nonhuman; particle size; plant growth; plant leaf; plant tissue; quality control; risk assessment; single particle inductively coupled plasma mass spectrometry; tomato; chemistry; mass spectrometry; metabolism; tomato, Lycopersicon esculentum, Gold; Limit of Detection; Lycopersicon esculentum; Mass Spectrometry; Metal Nanoparticles; Particle Size

International Standard Serial Number (ISSN)

0013-936X; 1520-5851

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2015 American Chemical Society (ACS), All rights reserved.

PubMed ID

25633589

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