New Approach for a Rapid, Easy, and Highly Sensitive Arsenic Test using Nanotechnology

Summary posted by Meridian on 11/25/2009
Source: AZoNano.com
Author: n/a

Researchers at Jackson State University, United States, have developed a new approach for a rapid, easy and highly sensitive arsenic test. Arsenic poisoning from contaminated groundwater affects about 140 million people worldwide. Current techniques for analyzing arsenic concentrations in drinking water are time consuming and require a series of enrichment steps. The new method involves attaching special organic molecules to the surface of gold nanoparticles, which then act as "ligands" for arsenic, meaning they form a complex with it. The gold particles clump together, with the number of aggregates based on the arsenic concentration in the water. The color of the gold nanoparticles in a liquid depends on their size, with the arsenic-free gold nanoparticles appearing red and arsenic-induced aggregation causing the color to change to blue. The method can detect arsenic in drinking water down to concentrations of three parts per trillion. The team has reported their findings in the journal Angewandte Chemie. The article can be viewed online at the link below.

As tagged by Meridian Institute:

Related Forums:

NDN Home

Manage Subscription

Search News Archives

Nanotechnology Quintuples Heating Capacity of Solar Water Heaters -- Renewable Energy Magazine (9/1/2010) Researchers at the University of Rio de Janeiro (UFRJ), Brazil, have developed a solar heating system that uses nanotechnology to heat water to five times the temperature of a conventional system, while also permitting the collector surface area to retain up to 98 percent of heat from solar radiation. [More]

Pakistan's Science Minister Attacks Funding Cuts -- SciDev.Net (9/1/2010) The Pakistan government has cuts its funds for the Pakistan Ministry of Science and Technology's 2010-2011 budget by almost half, causing the science minister, Muhammad Azam Khan Swati, to criticize his own government. [More]

Nanotechnology: Small wonders -- Nature (9/1/2010) This article takes an in-depth look at the United States National Nanotechnology Initiative (NNI)'s first 10 years - to find out where the money went and what the initiative plans to do next. [More]

Nanotech on Farmers' Fields -- Silicon Nutrition (8/31/2010) A plant nutrition study that addresses nano-sized plant nutrients is now available from the Landbouwkundige Uitgeverij G.C. van den Berg (Veenendaal, The Netherlands). [More]

More News...

Learn how to include these headlines on your own website by clicking here.

Please email us if you require text-only versions of the daily emails.








our team contact us site map	New Approach for a Rapid, Easy, and Highly Sensitive Arsenic Test using Nanotechnology Summary posted by Meridian on 11/25/2009 Source: AZoNano.com Author: n/a Researchers at Jackson State University, United States, have developed a new approach for a rapid, easy and highly sensitive arsenic test. Arsenic poisoning from contaminated groundwater affects about 140 million people worldwide. Current techniques for analyzing arsenic concentrations in drinking water are time consuming and require a series of enrichment steps. The new method involves attaching special organic molecules to the surface of gold nanoparticles, which then act as "ligands" for arsenic, meaning they form a complex with it. The gold particles clump together, with the number of aggregates based on the arsenic concentration in the water. The color of the gold nanoparticles in a liquid depends on their size, with the arsenic-free gold nanoparticles appearing red and arsenic-induced aggregation causing the color to change to blue. The method can detect arsenic in drinking water down to concentrations of three parts per trillion. The team has reported their findings in the journal Angewandte Chemie. The article can be viewed online at the link below. The original article may still be available at www.azonano.com/news.asp?newsID=14827 As tagged by Meridian Institute: Implications: Human Enhancement, Human Health Risks, Socio-Economic Effects Nanomaterials: Metal Nanoparticle Regions: North America Stakeholders: Academia Water And Sanitation: Purification, Quality Minerals And Metals: Metals Related Forums: Water and Sanitation Metals and Minerals Human Health Risks and Worker Safety Socio-Economic print format	NDN Home Subscribe Manage Subscription Search News Archives Nanotechnology Quintuples Heating Capacity of Solar Water Heaters -- Renewable Energy Magazine (9/1/2010) Researchers at the University of Rio de Janeiro (UFRJ), Brazil, have developed a solar heating system that uses nanotechnology to heat water to five times the temperature of a conventional system, while also permitting the collector surface area to retain up to 98 percent of heat from solar radiation. [More] Pakistan's Science Minister Attacks Funding Cuts -- SciDev.Net (9/1/2010) The Pakistan government has cuts its funds for the Pakistan Ministry of Science and Technology's 2010-2011 budget by almost half, causing the science minister, Muhammad Azam Khan Swati, to criticize his own government. [More] Nanotechnology: Small wonders -- Nature (9/1/2010) This article takes an in-depth look at the United States National Nanotechnology Initiative (NNI)'s first 10 years - to find out where the money went and what the initiative plans to do next. [More] Nanotech on Farmers' Fields -- Silicon Nutrition (8/31/2010) A plant nutrition study that addresses nano-sized plant nutrients is now available from the Landbouwkundige Uitgeverij G.C. van den Berg (Veenendaal, The Netherlands). [More] More News... Learn how to include these headlines on your own website by clicking here. Please email us if you require text-only versions of the daily emails.