Tags

Type your tag names separated by a space and hit enter

Characterization of engineered nanoparticles in commercially available spray disinfectant products advertised to contain colloidal silver.
Sci Total Environ. 2018 Apr 01; 619-620:1375-1384.ST

Abstract

Given the potential for human exposure to silver nanoparticles from spray disinfectants and dietary supplements, we characterized the silver-containing nanoparticles in 22 commercial products that advertised the use of silver or colloidal silver as the active ingredient. Characterization parameters included: total silver, fractionated silver (particulate and dissolved), primary particle size distribution, hydrodynamic diameter, particle number, and plasmon resonance absorbance. A high degree of variability between claimed and measured values for total silver was observed. Only 7 of the products showed total silver concentrations within 20% of their nominally reported values. In addition, significant variations in the relative percentages of particulate vs. soluble silver were also measured in many of these products reporting to be colloidal. Primary silver particle size distributions by transmission electron microscopy (TEM) showed two populations of particles - smaller particles (<5nm) and larger particles between 20 and 40nm. Hydrodynamic diameter measurements using nanoparticle tracking analysis (NTA) correlated well with TEM analysis for the larger particles. Z-average (Z-Avg) values measured using dynamic light scattering (DLS); however, were typically larger than both NTA or TEM particle diameters. Plasmon resonance absorbance signatures (peak absorbance at around 400nm indicative of metallic silver nanoparticles) were only noted in 4 of the 9 yellow-brown colored suspensions. Although the total silver concentrations were variable among products, ranging from 0.54mg/L to 960mg/L, silver containing nanoparticles were identified in all of the product suspensions by TEM.

Authors+Show Affiliations

U.S. Environmental Protection Agency, RTP, NC, United States. Electronic address: rogers.kim@epa.gov.U.S. Environmental Protection Agency, RTP, NC, United States.National Institute for Occupational Safety and Health, Morgantown, WV, United States.National Institute for Occupational Safety and Health, Morgantown, WV, United States.National Institute for Occupational Safety and Health, Morgantown, WV, United States.U.S. Environmental Protection Agency, Cincinnati, OH, United States.U.S. Environmental Protection Agency, Cincinnati, OH, United States.U.S. Environmental Protection Agency, Cincinnati, OH, United States.U.S. Environmental Protection Agency, Cincinnati, OH, United States.U.S. Environmental Protection Agency, RTP, NC, United States.U.S. Environmental Protection Agency, RTP, NC, United States.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29723948

Citation

Rogers, Kim R., et al. "Characterization of Engineered Nanoparticles in Commercially Available Spray Disinfectant Products Advertised to Contain Colloidal Silver." The Science of the Total Environment, vol. 619-620, 2018, pp. 1375-1384.
Rogers KR, Navratilova J, Stefaniak A, et al. Characterization of engineered nanoparticles in commercially available spray disinfectant products advertised to contain colloidal silver. Sci Total Environ. 2018;619-620:1375-1384.
Rogers, K. R., Navratilova, J., Stefaniak, A., Bowers, L., Knepp, A. K., Al-Abed, S. R., Potter, P., Gitipour, A., Radwan, I., Nelson, C., & Bradham, K. D. (2018). Characterization of engineered nanoparticles in commercially available spray disinfectant products advertised to contain colloidal silver. The Science of the Total Environment, 619-620, 1375-1384. https://doi.org/10.1016/j.scitotenv.2017.11.195
Rogers KR, et al. Characterization of Engineered Nanoparticles in Commercially Available Spray Disinfectant Products Advertised to Contain Colloidal Silver. Sci Total Environ. 2018 Apr 1;619-620:1375-1384. PubMed PMID: 29723948.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Characterization of engineered nanoparticles in commercially available spray disinfectant products advertised to contain colloidal silver. AU - Rogers,Kim R, AU - Navratilova,Jana, AU - Stefaniak,Aleksandr, AU - Bowers,Lauren, AU - Knepp,Alycia K, AU - Al-Abed,Souhail R, AU - Potter,Phillip, AU - Gitipour,Alireza, AU - Radwan,Islam, AU - Nelson,Clay, AU - Bradham,Karen D, Y1 - 2017/11/23/ PY - 2017/09/13/received PY - 2017/11/16/revised PY - 2017/11/17/accepted PY - 2018/5/5/entrez PY - 2018/5/5/pubmed PY - 2018/5/5/medline KW - Colloidal KW - Dietary supplement KW - Human exposure KW - Nanoparticle KW - Silver KW - Spray disinfectant SP - 1375 EP - 1384 JF - The Science of the total environment JO - Sci Total Environ VL - 619-620 N2 - Given the potential for human exposure to silver nanoparticles from spray disinfectants and dietary supplements, we characterized the silver-containing nanoparticles in 22 commercial products that advertised the use of silver or colloidal silver as the active ingredient. Characterization parameters included: total silver, fractionated silver (particulate and dissolved), primary particle size distribution, hydrodynamic diameter, particle number, and plasmon resonance absorbance. A high degree of variability between claimed and measured values for total silver was observed. Only 7 of the products showed total silver concentrations within 20% of their nominally reported values. In addition, significant variations in the relative percentages of particulate vs. soluble silver were also measured in many of these products reporting to be colloidal. Primary silver particle size distributions by transmission electron microscopy (TEM) showed two populations of particles - smaller particles (<5nm) and larger particles between 20 and 40nm. Hydrodynamic diameter measurements using nanoparticle tracking analysis (NTA) correlated well with TEM analysis for the larger particles. Z-average (Z-Avg) values measured using dynamic light scattering (DLS); however, were typically larger than both NTA or TEM particle diameters. Plasmon resonance absorbance signatures (peak absorbance at around 400nm indicative of metallic silver nanoparticles) were only noted in 4 of the 9 yellow-brown colored suspensions. Although the total silver concentrations were variable among products, ranging from 0.54mg/L to 960mg/L, silver containing nanoparticles were identified in all of the product suspensions by TEM. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/29723948/Characterization_of_engineered_nanoparticles_in_commercially_available_spray_disinfectant_products_advertised_to_contain_colloidal_silver L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(17)33253-9 DB - PRIME DP - Unbound Medicine ER -
Try the Free App:
Prime PubMed app for iOS iPhone iPad
Prime PubMed app for Android
Prime PubMed is provided
free to individuals by:
Unbound Medicine.