Digestion Coupled with Programmed Thermal Analysis for Quantification of Multiwall Carbon Nanotubes in Plant Tissues
| Autor: | Baoshan Xing, Kamol K. Das, Lucas Bancroft, Yu Yang, Judith C. Chow, Xiaoliang Wang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Health
Toxicology and Mutagenesis chemistry.chemical_element Biomass 02 engineering and technology Carbon nanotube 010501 environmental sciences 01 natural sciences law.invention chemistry.chemical_compound Nitric acid law Environmental Chemistry Thermal analysis Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Ecology Sulfuric acid Contamination 021001 nanoscience & nanotechnology Pollution chemistry Chemical engineering 0210 nano-technology Carbon Quantitative analysis (chemistry) |
| Zdroj: | Environmental Science & Technology Letters. 5:442-447 |
| ISSN: | 2328-8930 |
| DOI: | 10.1021/acs.estlett.8b00287 |
| Popis: | The rapidly growing application of carbon nanotubes (CNTs) for industry and consumer products will inevitably lead to their accumulation in the environment. Protection of food safety from contamination by CNTs and best-practice management of agricultural application of CNTs require quantification of CNTs in agricultural plants. Herein, a novel method of digestion coupled with programmed thermal analysis (PTA) was developed for quantitative analysis of multiwall CNTs (MWCNTs) in plant (lettuce) tissues. MWCNT-bound carbon was linearly correlated with elemental carbon (EC) detected by PTA, including EC1 (58.5%) (evolved at 580 °C) and EC2 (41.5%) (evolved at 740 °C), corresponding to less stable and stable carbon, respectively. The background plant materials could interfere with EC quantification of CNTs, as a substantial fraction of the plant biomass was charred during the thermal analysis. Sequential digestion with concentrated nitric acid (HNO3) and sulfuric acid (H2SO4) effectively minimized the interfe... |
| Databáze: | OpenAIRE |
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