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浮遊ナノ素材計測には従来と全く異なる計測法とツールが必要との報告New Methods & Tools Needed to Measure Exposure to Airborne Nanomater
http://www.nanotechproject.org/118/41707-new-methods-tools-needed-to-measure-exposure-to-airborne-nanomaterials
浮遊ナノ素材計測には従来と全く異なる計測法とツールが必要との報告
New Methods & Tools Needed to Measure Exposure to Airborne Nanomaterials
4/17/07 -
• View article: Assessing Exposure to Airborne Nanomaterials: Current Abilities and Future Requirements
WASHINGTON, DC—New methods and tools for measuring exposure to airborne engineered nanomaterials will be required to protect the health of workers in nanotechnology-related jobs— estimated to total 10 million people by 2014—according to two occupational health experts writing in the inaugural issue of the journal Nanotoxicology.
The article, “Assessing Exposure to Airborne Nanomaterials: Current Abilities and Future Requirements,” written by Andrew Maynard, chief science advisor at the Wilson Center’s Project on Emerging Nanotechnologies, and Robert Aitken, director of strategic consulting at the Institute of Occupational Medicine (Edinburgh, UK), can be viewed online at http://www.nanotoxicology.net
“Airborne engineered nanomaterials present complex exposure measurement challenges,” Maynard said. “Conventional approaches—measuring the mass of airborne material—will not always be sufficient. This presents a challenge because studies have indicated that, on a mass-for-mass basis, certain nanometer-scale particles may be more toxic than larger particles with a similar composition. In other words, smaller particles may be more harmful than conventional thinking would lead us to believe.”
Maynard and Aitken reduced the incredibly diverse set of possible engineered nanoparticles into nine distinct categories, ranging from very simple spherical particles to complex multifunctional particles. By pairing these categories with particle properties associated with potential health effects, they teased out possible monitoring approaches for each particle-property combination.
“What our analysis shows is that in the complex new ‘nano world’ there is no single or simple method for monitoring nanoaerosol exposures in order to assess and manage potential health effects,” Aitken explained. “There are instruments that present partial solutions to the measurement challenges we face. But at the end of the day, we lack the tools and devices that are sophisticated, cost-effective and fast enough to do the job.”
Maynard and Aitken conclude that current approaches of measuring the number of particles in a volume of air, surface areas, and mass concentration, will all be useful to some degree. However, further research is needed to identify which is most important for specific nanomaterials and which measurement methods are most effective.
The authors advocate developing a new “universal aerosol monitor” capable of providing detailed information on the nature of airborne engineered nanomaterials to which people are exposed. Maynard, Aitken and 12 other experts included development of such a versatile measurement tool among five grand challenges that they viewed as essential to achieving the safe handling of nanotechnology in an article that appeared in the November 16, 2006 issue of the journal Nature.
The proposed wearable sampling device would measure aerosol number, surface area, and concentration mass simultaneously and would be low cost. Today, stand-alone instruments can perform the individual types of measurements called for by Maynard and Aitken. “Bringing these technologies together into a single package within the size and cost parameters discussed does present a significant challenge,” they write.
“An economical integrated device will empower small and large nanotechnology industries alike to reduce uncertainty over what their workers are exposed to, and enable them to develop safer working environments” said Maynard. “This will require targeted research into developing new methodologies and new instruments. But the rapid advancement and commercialization of nanotechnologies are leading to the need for effective—if not necessarily perfect—exposure measurement approaches and devices to be developed as soon as possible.”
In 2005, nanotechnology was incorporated into $30 billion in manufactured goods—a number predicted to grow to $2.6 trillion in annual manufactured goods by 2014. Already, there are almost 400 manufacturer-identified nanotechnology-based consumer products on the market—ranging from computer chips to automobile parts and from clothing to cosmetics and dietary supplements. View an inventory of these products here: www.nanotechproject.org/consumerproducts
About Nanotechnology
Nanotechnology is the ability to measure, see, manipulate and manufacture things usually between 1 and 100 nanometers. A nanometer is one billionth of a meter; a human hair is roughly 100,000 nanometers wide. More than $30 billion in products incorporating nanotechnology were sold globally in 2005. By 2014, Lux Research estimates this figure will grow to $2.6 trillion.
The Project on Emerging Nanotechnologies is an initiative launched by the Woodrow Wilson International Center for Scholars and The Pew Charitable Trusts in 2005. It is dedicated to helping business, government and the public anticipate and manage possible health and environmental implications of nanotechnology. For more information about the project, log on to www.nanotechproject.org.
The Pew Charitable Trusts is a national charitable organization serving the public interest by informing the public, advancing policy solutions and supporting civic life. Based in Philadelphia, with an office in Washington, D.C., the Trusts will invest $248 million in fiscal year 2007 to provide organizations with fact-based research and practical solutions for challenging issues.
The Woodrow Wilson International Center for Scholars is the living, national memorial to President Wilson established by Congress in 1968 and headquartered in Washington, D.C. The Center establishes and maintains a neutral forum for free, open, and informed dialogue. It is a nonpartisan institution, supported by public and private funds and engaged in the study of national and international affairs.
浮遊ナノ素材計測には従来と全く異なる計測法とツールが必要との報告
New Methods & Tools Needed to Measure Exposure to Airborne Nanomaterials
4/17/07 -
• View article: Assessing Exposure to Airborne Nanomaterials: Current Abilities and Future Requirements
WASHINGTON, DC—New methods and tools for measuring exposure to airborne engineered nanomaterials will be required to protect the health of workers in nanotechnology-related jobs— estimated to total 10 million people by 2014—according to two occupational health experts writing in the inaugural issue of the journal Nanotoxicology.
The article, “Assessing Exposure to Airborne Nanomaterials: Current Abilities and Future Requirements,” written by Andrew Maynard, chief science advisor at the Wilson Center’s Project on Emerging Nanotechnologies, and Robert Aitken, director of strategic consulting at the Institute of Occupational Medicine (Edinburgh, UK), can be viewed online at http://www.nanotoxicology.net
“Airborne engineered nanomaterials present complex exposure measurement challenges,” Maynard said. “Conventional approaches—measuring the mass of airborne material—will not always be sufficient. This presents a challenge because studies have indicated that, on a mass-for-mass basis, certain nanometer-scale particles may be more toxic than larger particles with a similar composition. In other words, smaller particles may be more harmful than conventional thinking would lead us to believe.”
Maynard and Aitken reduced the incredibly diverse set of possible engineered nanoparticles into nine distinct categories, ranging from very simple spherical particles to complex multifunctional particles. By pairing these categories with particle properties associated with potential health effects, they teased out possible monitoring approaches for each particle-property combination.
“What our analysis shows is that in the complex new ‘nano world’ there is no single or simple method for monitoring nanoaerosol exposures in order to assess and manage potential health effects,” Aitken explained. “There are instruments that present partial solutions to the measurement challenges we face. But at the end of the day, we lack the tools and devices that are sophisticated, cost-effective and fast enough to do the job.”
Maynard and Aitken conclude that current approaches of measuring the number of particles in a volume of air, surface areas, and mass concentration, will all be useful to some degree. However, further research is needed to identify which is most important for specific nanomaterials and which measurement methods are most effective.
The authors advocate developing a new “universal aerosol monitor” capable of providing detailed information on the nature of airborne engineered nanomaterials to which people are exposed. Maynard, Aitken and 12 other experts included development of such a versatile measurement tool among five grand challenges that they viewed as essential to achieving the safe handling of nanotechnology in an article that appeared in the November 16, 2006 issue of the journal Nature.
The proposed wearable sampling device would measure aerosol number, surface area, and concentration mass simultaneously and would be low cost. Today, stand-alone instruments can perform the individual types of measurements called for by Maynard and Aitken. “Bringing these technologies together into a single package within the size and cost parameters discussed does present a significant challenge,” they write.
“An economical integrated device will empower small and large nanotechnology industries alike to reduce uncertainty over what their workers are exposed to, and enable them to develop safer working environments” said Maynard. “This will require targeted research into developing new methodologies and new instruments. But the rapid advancement and commercialization of nanotechnologies are leading to the need for effective—if not necessarily perfect—exposure measurement approaches and devices to be developed as soon as possible.”
In 2005, nanotechnology was incorporated into $30 billion in manufactured goods—a number predicted to grow to $2.6 trillion in annual manufactured goods by 2014. Already, there are almost 400 manufacturer-identified nanotechnology-based consumer products on the market—ranging from computer chips to automobile parts and from clothing to cosmetics and dietary supplements. View an inventory of these products here: www.nanotechproject.org/consumerproducts
About Nanotechnology
Nanotechnology is the ability to measure, see, manipulate and manufacture things usually between 1 and 100 nanometers. A nanometer is one billionth of a meter; a human hair is roughly 100,000 nanometers wide. More than $30 billion in products incorporating nanotechnology were sold globally in 2005. By 2014, Lux Research estimates this figure will grow to $2.6 trillion.
The Project on Emerging Nanotechnologies is an initiative launched by the Woodrow Wilson International Center for Scholars and The Pew Charitable Trusts in 2005. It is dedicated to helping business, government and the public anticipate and manage possible health and environmental implications of nanotechnology. For more information about the project, log on to www.nanotechproject.org.
The Pew Charitable Trusts is a national charitable organization serving the public interest by informing the public, advancing policy solutions and supporting civic life. Based in Philadelphia, with an office in Washington, D.C., the Trusts will invest $248 million in fiscal year 2007 to provide organizations with fact-based research and practical solutions for challenging issues.
The Woodrow Wilson International Center for Scholars is the living, national memorial to President Wilson established by Congress in 1968 and headquartered in Washington, D.C. The Center establishes and maintains a neutral forum for free, open, and informed dialogue. It is a nonpartisan institution, supported by public and private funds and engaged in the study of national and international affairs.
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, Apr 23 2007, 3:57 AM EDT
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