Abstract
Due to its high nitrogen content and low cost, melamine, a widely used material in plastics industry, has been illegally added to food products to boost apparent protein content. We've previously developed a colorimetric method to detect melamine. This method utilizes the melamine-concentration dependent gradual color shift of gold nanoparticles (AuNPs) and an absorbance reader is usually required for reliable quantification of melamine. Herein, we present a novel strategy for reliable visual quantification of melamine without any equipment. First of all, we further explored the mechanism of the melamine-induced AuNP aggregation with various experimental techniques. Secondly, based on the findings from the mechanism studies, we've developed and demonstrated a critical coagulation concentration (CCC)-based salt titration as a reliable means to visually quantify the melamine. This has allowed us to accurately quantify melamine at a level as low as 30 ppb without any equipment.
| Original language | English |
|---|---|
| Title of host publication | Technical Proceedings of the 2013 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2013 |
| Pages | 139-142 |
| Number of pages | 4 |
| Volume | 3 |
| State | Published - Aug 9 2013 |
| Event | Nanotechnology 2013: Bio Sensors, Instruments, Medical, Environment and Energy - 2013 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2013 - Washington, DC, United States Duration: May 12 2013 → May 16 2013 |
Other
| Other | Nanotechnology 2013: Bio Sensors, Instruments, Medical, Environment and Energy - 2013 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2013 |
|---|---|
| Country | United States |
| City | Washington, DC |
| Period | 5/12/13 → 5/16/13 |
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Keywords
- Colorimetric
- Critical coagulation concentration
- Gold nanoparticles
- Melamine
ASJC Scopus subject areas
- Biotechnology
Cite this
Visual quantification of melamine using citrate-capped gold nanoparticles. / Li, Na; Yu, Lu; Van Tran, Thien; Zou, Jia Qi.
Technical Proceedings of the 2013 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2013. Vol. 3 2013. p. 139-142.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Visual quantification of melamine using citrate-capped gold nanoparticles
AU - Li, Na
AU - Yu, Lu
AU - Van Tran, Thien
AU - Zou, Jia Qi
PY - 2013/8/9
Y1 - 2013/8/9
N2 - Due to its high nitrogen content and low cost, melamine, a widely used material in plastics industry, has been illegally added to food products to boost apparent protein content. We've previously developed a colorimetric method to detect melamine. This method utilizes the melamine-concentration dependent gradual color shift of gold nanoparticles (AuNPs) and an absorbance reader is usually required for reliable quantification of melamine. Herein, we present a novel strategy for reliable visual quantification of melamine without any equipment. First of all, we further explored the mechanism of the melamine-induced AuNP aggregation with various experimental techniques. Secondly, based on the findings from the mechanism studies, we've developed and demonstrated a critical coagulation concentration (CCC)-based salt titration as a reliable means to visually quantify the melamine. This has allowed us to accurately quantify melamine at a level as low as 30 ppb without any equipment.
AB - Due to its high nitrogen content and low cost, melamine, a widely used material in plastics industry, has been illegally added to food products to boost apparent protein content. We've previously developed a colorimetric method to detect melamine. This method utilizes the melamine-concentration dependent gradual color shift of gold nanoparticles (AuNPs) and an absorbance reader is usually required for reliable quantification of melamine. Herein, we present a novel strategy for reliable visual quantification of melamine without any equipment. First of all, we further explored the mechanism of the melamine-induced AuNP aggregation with various experimental techniques. Secondly, based on the findings from the mechanism studies, we've developed and demonstrated a critical coagulation concentration (CCC)-based salt titration as a reliable means to visually quantify the melamine. This has allowed us to accurately quantify melamine at a level as low as 30 ppb without any equipment.
KW - Colorimetric
KW - Critical coagulation concentration
KW - Gold nanoparticles
KW - Melamine
UR - http://www.scopus.com/inward/record.url?scp=84881103780&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84881103780&partnerID=8YFLogxK
M3 - Conference contribution
SN - 9781482205862
VL - 3
SP - 139
EP - 142
BT - Technical Proceedings of the 2013 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2013
ER -