Improved extraction efficiency of natural nanomaterials in soils to facilitate their characterization using a multimethod approach

Detection and quantification of anthropogenic titanium-, cerium-, and lanthanum-bearing home dust particles

“…The <450 nm size fraction was extracted from the home dusts following the procedure described in detail in our previous study. 51 Briefly, dusts were suspended in 10 mM tetrasodium pyrophosphate at pH 10 for 24 h by overhead 360-degree rotation. Then, the <450 nm size fraction was separated by centrifugation (Eppendorf, 5810 R, Hamburg, Germany) at 775 g for 25 min (<450 nm assuming natural particle density ρ = 2.5 g cm −3 ) to prevent clogging of the ICP-MS introduction system.…”

Current Methods and Prospects for Analysis and Characterization of Nanomaterials in the Environment

“…Modified extraction methods have recently been developed to improve NP recoveries and achieve speciation analysis in soils or sediments. Notably, sodium pyrophosphate, an established reagent for extracting organic and inorganic colloids, , including NNMs, , from soils and sediments, has recently been demonstrated to be efficient for extracting various ENMs with enhanced recoveries. A recent study evaluated the efficiency of various extractants, including sodium pyrophosphate, in extracting nanoparticulate Ag from a field soil amended with biosolids containing Ag NPs and reported that pyrophosphate, among the tested reagents, showed the highest recoveries of nanoparticulate Ag while inhibiting its dissolution .…”

Identification and quantification of anthropogenic nanomaterials in urban rain and runoff using single particle-inductively coupled plasma-time of flight-mass spectrometry

“…2,29 SP-ICP-TOF-MS provides information on particles with masses greater than the method mass detection limit, but requires particle extraction with typically low extraction efficiency. 42,43 SP-ICP-TOF-MS measures all metal/metalloids in a single particle simultaneously and analyzes thousands of particles in a few minutes. Thus, SP-ICP-TOF-MS generates a large amount of data of NM elemental composition.…”