| Title |
Gold nanoparticle-based colorimetric sensing of dipicolinic acid from complex samples
|
|---|---|
| Published in |
Analytical & Bioanalytical Chemistry, January 2018
|
| DOI | 10.1007/s00216-017-0836-2 |
| Pubmed ID | |
| Authors |
Mirza Muhammad Fahad Baig, Yu-Chie Chen |
| Abstract |
Dipicolinic acid (DPA) can cause neurotoxicity and is abundant in bacterial spores. Although analytical methods have been reported for DPA detection with high sensitivity, their selectivity toward DPA is declined greatly in the presence of phosphates in the samples. In this study, we developed an approach for DPA detection that is not affected by the presence of phosphates. A colorimetric method based on the use of gold nanoparticles (AuNP) complexed with Ca2+ as sensing agents was explored for DPA detection. Calcium ions and glutathione-capped gold nanoparticles (AuNPs@GSH) can easily form complexes (Ca2+-AuNP@GSH) through GSH-Ca2+ chelation, leading to the aggregation of AuNPs@GSH. The aggregation resulting from the complexes of AuNPs@GSH and Ca2+ can be reversed with the addition of DPA owing to the high formation constant (log Kf = 4.4) between DPA and Ca2+. Furthermore, the color of AuNPs@GSH changes from red to purple when complexed with Ca2+, returning to red upon addition of DPA. The limit of detection of this sensing method toward DPA was estimated to be as low as ~ 2 μM. The feasibility of using the sensing method for quantitative detection of DPA in soil and Bacillus cereus spore samples was also demonstrated. Graphical abstract A AuNP-based colorimetric sensing method against dipicolinic acid is developed. |
X Demographics
The data shown below were collected from the profiles of 2 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Saudi Arabia | 1 | 50% |
| Unknown | 1 | 50% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Scientists | 2 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 12 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 12 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 4 | 33% |
| Student > Master | 2 | 17% |
| Researcher | 2 | 17% |
| Student > Bachelor | 1 | 8% |
| Other | 1 | 8% |
| Other | 1 | 8% |
| Unknown | 1 | 8% |
| Readers by discipline | Count | As % |
|---|---|---|
| Chemistry | 3 | 25% |
| Pharmacology, Toxicology and Pharmaceutical Science | 2 | 17% |
| Environmental Science | 1 | 8% |
| Agricultural and Biological Sciences | 1 | 8% |
| Biochemistry, Genetics and Molecular Biology | 1 | 8% |
| Other | 0 | 0% |
| Unknown | 4 | 33% |
Attention Score in Context
This research output has an Altmetric Attention Score of 5. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 10 April 2020.
All research outputs
#7,305,383
of 25,382,440 outputs
Outputs from Analytical & Bioanalytical Chemistry
#1,677
of 9,619 outputs
Outputs of similar age
#139,173
of 450,340 outputs
Outputs of similar age from Analytical & Bioanalytical Chemistry
#24
of 192 outputs
Altmetric has tracked 25,382,440 research outputs across all sources so far. This one has received more attention than most of these and is in the 71st percentile.
So far Altmetric has tracked 9,619 research outputs from this source. They receive a mean Attention Score of 3.1. This one has done well, scoring higher than 82% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 450,340 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 68% of its contemporaries.
We're also able to compare this research output to 192 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 87% of its contemporaries.