E-ISSN 2576-3741
 

Original Research (Original Article) 


Chemical and Physical Characterization of McIntyre Powder using Inductively Coupled Plasma Mass Spectroscopy and Electron Microscopy

Dave K. Verma , Marcia Reid, James T. Purdham, Karen des Tombe.

Abstract
Aim: The objective of this study was to determine the chemical and physical characteristics of McIntyre powder, which was stated to be a mixture of aluminum oxide and elemental aluminum. The aim was to (i) confirm this with current techniques and to see if there were any toxic metals present, which could contribute to health effects including neurological disorders, Parkinsonĺs and (ii) obtain a precise particle size distribution. McIntyre Powder was inhaled by at least 27,500 gold and uranium miners of Ontario as a prophylaxis to prevent silicosis during 1944-1979.
Materials and Methods: The chemical characterization involved analysis by inductively coupled plasma mass spectroscopy (ICP-MS) and by scanning electron microscopy. The physical characterization was carried out using transmission electron microscopy.
Results: The chemical analysis results confirm that the McIntyre Powder contains mainly aluminum and only trace amounts of other metals. The physical characterization shows that it is about 12% ultra fine (also referred to as nano particles) and 88% fine particles. Approximate aerodynamic diameters of the particles are mean 321.5 nm (0.32 ým), median 273.8 nm (0.27 ým) with a range of 9.5 nm (0.01 ým) to 1314 nm (1.31 ým).
Conclusion: There are no metallic impurities in McIntyre Powder in quantities that could make a significant contribution to health effects. There is a 12% ultrafine particle content which could be important because of the apparent ability to translocate to the brain.

Key words: McIntyre Powder, particle size, ultra fine particles, inductively coupled plasma mass spectrophotometry, scanning electron microscopy, transmission electron microscopy


 
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How to Cite this Article
Pubmed Style

DKV, Reid M, Purdham JT, KdT, . Chemical and Physical Characterization of McIntyre Powder using Inductively Coupled Plasma Mass Spectroscopy and Electron Microscopy. doi:10.5455/ajpmph.20190927030605


Web Style

DKV, Reid M, Purdham JT, KdT, . Chemical and Physical Characterization of McIntyre Powder using Inductively Coupled Plasma Mass Spectroscopy and Electron Microscopy. http://www.ajpmph.com/?mno=67376 [Access: March 31, 2020]. doi:10.5455/ajpmph.20190927030605


AMA (American Medical Association) Style

DKV, Reid M, Purdham JT, KdT, . Chemical and Physical Characterization of McIntyre Powder using Inductively Coupled Plasma Mass Spectroscopy and Electron Microscopy. doi:10.5455/ajpmph.20190927030605



Vancouver/ICMJE Style

DKV, Reid M, Purdham JT, KdT, . Chemical and Physical Characterization of McIntyre Powder using Inductively Coupled Plasma Mass Spectroscopy and Electron Microscopy. doi:10.5455/ajpmph.20190927030605



Harvard Style

, D. K. V. . ., Reid, M., Purdham, J. T., , K. d. T. & (2020) Chemical and Physical Characterization of McIntyre Powder using Inductively Coupled Plasma Mass Spectroscopy and Electron Microscopy. doi:10.5455/ajpmph.20190927030605



Turabian Style

, Dave K. Verma , Marcia Reid, James T. Purdham, Karen des Tombe, and . 2020. Chemical and Physical Characterization of McIntyre Powder using Inductively Coupled Plasma Mass Spectroscopy and Electron Microscopy. doi:10.5455/ajpmph.20190927030605



Chicago Style

, Dave K. Verma , Marcia Reid, James T. Purdham, Karen des Tombe, and . "Chemical and Physical Characterization of McIntyre Powder using Inductively Coupled Plasma Mass Spectroscopy and Electron Microscopy." doi:10.5455/ajpmph.20190927030605



MLA (The Modern Language Association) Style

, Dave K. Verma , Marcia Reid, James T. Purdham, Karen des Tombe, and . "Chemical and Physical Characterization of McIntyre Powder using Inductively Coupled Plasma Mass Spectroscopy and Electron Microscopy." doi:10.5455/ajpmph.20190927030605



APA (American Psychological Association) Style

, D. K. V. . ., Reid, M., Purdham, J. T., , K. d. T. & (2020) Chemical and Physical Characterization of McIntyre Powder using Inductively Coupled Plasma Mass Spectroscopy and Electron Microscopy. doi:10.5455/ajpmph.20190927030605





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