Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Iranian Researchers Develop Simple Method to Measure Lead Levels

Abstract:
Iranian researchers succeeded in developing a simple test to quickly and accurately measure lead (II) levels in aqueous solutions down to very low concentrations.

Iranian Researchers Develop Simple Method to Measure Lead Levels

Iran | Posted on August 18th, 2010

The test, developed by Razi University researchers, uses a solution of azacrown ether-modified AuNPs, which changes color in the presence of the toxic metal ion. This color change is visually discernible by an appearance of the surface plasmon band (SPB) at 520 nm.

The recognition mechanism is attributed to the unique structure of monoazacrown ether attached to AuNPs and metal sandwiches coordinated between two azacrown ether moieties that are attached to separate AuNPs. This inter particle cross-linking results in aggregation and an apparent color change from brown to purple.

The sensor is selective against alkali-, alkaline-earth- and heavy-transition-metal ions. Such selectivity is essential for applications involving real environmental samples. Compared with many current optical chemosensors for lead (II), this sensor is rapid, cost-effective and enzyme-free.

The system allows easy detection of lead ions by the naked eye without resorting to any expensive instruments. Significantly, this method can, in principle, be used to detect other metal ions by changing the structure and the size of ionophores that selectively bind other metal ions.

The work, performed in collaboration with different teams, was managed by Dr Abdolhamid Alizadeh, the head of the nanoparticle research group at the Nanoscience and Nanotechnology Research Center (NNRC), Razi University, Kermanshah, western Iran,

Also Prof. Mohammad M Khodaei, University President. Changiz Karami is a graduate student in the group of Dr Alizadeh and is supported by a scholarship of the Iran Nanotechnology Initiative Council (INIC).

The functionalized thiols were synthesized in collaboration with Prof. M S Workentin, Department of Chemistry, University of Western Ontario, Canada. The UV-Vis experiments were conducted in collaboration with Prof. Mojtaba Shamsipour and his PhD student, Marzieh Sadeqi, in the Chemistry Department at Razi University.

The main research interest of Alizadeh's group is directed towards the investigation of parameters that affect the mechanisms and dynamics of organic reactions, such as condensation, coupling and complexation, occurring in ordered environments like gold nanoparticle surfaces.

The team is currently exploring new and selective protocols for adding (or removing) functionality to the surface of metallic nanoparticles.

####

For more information, please click here

Copyright © FARS

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Video captures bubble-blowing battery in action: Researchers propose how bubbles form, could lead to smaller lithium-air batteries April 26th, 2017

New Product Nanoparticle preparation from Intertronics with new Thinky NP-100 Nano Pulveriser April 26th, 2017

California Research Alliance by BASF establishes more than 25 research projects in three years April 26th, 2017

Affordable STM32 Cloud-Connectable Kit from STMicroelectronics Puts More Features On-Board for Fast and Flexible IoT-Device Development April 26th, 2017

Academic/Education

California Research Alliance by BASF establishes more than 25 research projects in three years April 26th, 2017

SUNY Polytechnic Institute Announces Total of 172 Teams Selected to Compete in Solar in Your Community Challenge: Teams from 40 states, plus Washington, DC, 2 Territories, and 4 American Indian Reservations, Will Deploy Solar in Underserved Communities April 20th, 2017

Rice crew revved for Nanocar Race: Nanocar creator James Tour and team take on international competition with single-molecule marvel April 20th, 2017

The Catholic University of Rome uses the JPK NanoWizardŽ AFM & CellHesionŽ systems to understand how cells sense and respond to mechanical stimuli April 5th, 2017

Announcements

Video captures bubble-blowing battery in action: Researchers propose how bubbles form, could lead to smaller lithium-air batteries April 26th, 2017

New Product Nanoparticle preparation from Intertronics with new Thinky NP-100 Nano Pulveriser April 26th, 2017

California Research Alliance by BASF establishes more than 25 research projects in three years April 26th, 2017

Affordable STM32 Cloud-Connectable Kit from STMicroelectronics Puts More Features On-Board for Fast and Flexible IoT-Device Development April 26th, 2017

Environment

NanoMONITOR shares its latest developments concerning the NanoMONITOR Software and the Monitoring stations April 21st, 2017

Wood filter removes toxic dye from water April 21st, 2017

Making Batteries From Waste Glass Bottles: UCR researchers are turning glass bottles into high performance lithium-ion batteries for electric vehicles and personal electronics April 19th, 2017

Shedding light on the absorption of light by titanium dioxide April 14th, 2017

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project