Extraction Method Development for Quantitative Detection of Silver Nanoparticles in Environmental Soils and Sediments by Single Particle Inductively Coupled Plasma Mass Spectrometry.

For understanding the environmental behavior and toxicity of Ag nanoparticles (Ag-NPs), a quantitative method for characterizing the AgNPs in soils and sediments is urgently needed. In this study, we validated a previously developed extraction method by optimizing the extraction of silver nanoparticles from soil and sediment samples to which engineered AgNPs had been added. The samples were analyzed by single particle inductively coupled plasma mass spectrometry (SP-ICP-MS).

Detection of C in environmental water using dispersive liquid-liquid micro-extraction followed by high-performance liquid chromatography.

The wide application of fullerene C nanoparticles would inevitably lead to their release into the environment. In order to evaluate the environment risks of C and the subsequent effects on ecosystem health, a reliable quantitative methodology of C should be established. In this study, a rapid pretreatment method called low-density solvent-based dispersive liquid-liquid micro-extraction (DLLME) combined high-performance liquid chromatography-UV detector (HPLC-UV) was developed to detect C in environmental water.

Analysis of metallic nanoparticles and their ionic counterparts in complex matrix by reversed-phase liquid chromatography coupled to ICP-MS.

Developing quantification and characterization methodology for metallic nanoparticles (MNPs) and their ionic component in complex matrix are crucial for the evaluation of their environmental behavior and health risks to humans. In this study, reversed phase high performance liquid chromatography combined ICP-MS was established for the characterization of MNPs in complex matrix. The ionic component could be separated from NPs with the optimized parameters of aqueous mobile phase.

QuEChERS followed by dispersive liquid-liquid microextraction based on solidification of floating organic droplet method for organochlorine pesticides analysis in fish.

A fast, sensitive and environmental-friendly method was developed to determine 13 organochlorine pesticides in fish tissue through gas chromatography with electron capture detection. Sample was extracted initially by acetonitrile and then concentrated through dispersive liquid-liquid microextraction based on solidification of floating organic droplet (DLLME-SFO). Dispersive solid phase extraction (d-SPE) was not a separate step but integrated to DLLME-SFO procedure.

Separation and determination of silver nanoparticle in environmental water and the UV-induced photochemical transformations study of AgNPs by cloud point extraction combined ICP-MS.

In this study, cloud point extraction (CPE) combined inductively coupled plasma mass spectrometry (ICP-MS) was used to determinate silver nanoparticles (AgNPs) in environmental water. AgNPs dispersed in water could be extracted into surfactant phase based on optimized CPE parameters which including pH, incubation temperature and equilibration time, the content of nonionic surfactants (Triton X-114, TX-114) and NaSO. Good separation results of AgNPs and ionic silver Ag(I) in aqueous environment was obtained with the addition of NaSO when the concentration of Ag(I) was lower than ten times of AgNPs.

Analysis of silver and gold nanoparticles in environmental water using single particle-inductively coupled plasma-mass spectrometry.

The production and use of engineering nanomaterials (ENMs) leads to the release of manufactured or engineered nanoparticles into environment. The quantification and characterization of ENMs are crucial for the assessment of their environmental fate, transport behavior and health risks to humans. To analyze the size distribution and particle number concentration of AgNPs and AuNPs in environmental water and track their stability at low number concentration, a systematic study on SP-ICPMS was presented.