Abstract
The application of mercaptosuccinic acid-capped gold nanoparticles as a sensing probe for the colorimetric detection of Fe(III) is reported. The well-dispersed gold nanoparticles (AuNPs) with a diameter of around 20 nm were obtained by a one-step reaction of tetrachloroauratic acid with mercaptosuccinic acid (MSA) as a reducing and capping agent, respectively. Fe(III) reportedly causes the aggregation of prepared MSA-capped AuNPs followed by a change in color and a shift to long wavelengths in the absorbance spectra. The resulting method allows for a visual and spectrophotometric Fe(III) determination with detection limits of 30 ng/mL and 23 ng/mL, respectively. MSA-capped AuNPs have been used as sensing probes for the detection of Fe(III) in drinking water samples with a detection limit that is much lower than the maximum permissible level of Fe(III) specified by official regulations (300 ng/mL).
Highlights
The control of the quality and composition of consumed drinking water has become extremely important
Pyrophosphate [9], hydroxamic acid [10], oxamic and p-aminobenzoic acids [11], casein [12], andchitosan [13,14] have been employed for the colorimetric detection of Fe(III) in various environmental and biological samples
A colorimetric system based on gold nanoparticles (AuNPs) functionalized with mercaptosuccinic acid (MSA) for the simple, rapid, selective, and cost-effective detection of trace Fe(III) ions in water was developed
Summary
The control of the quality and composition of consumed drinking water has become extremely important. Considering that a high consumption of Fe(III) can cause toxic effects, the determination of Fe(III) content in water resources is of great importance for human life. Various analytical methods, such as atomic absorption spectrometry [2], inductively couple plasma mass spectrometry [3], liquid chromatography [4], and spectrophotometric [5] and fluorescent [6] methods, are successfully applied for Fe(III) determination. A colorimetric system based on gold nanoparticles (AuNPs) functionalized with mercaptosuccinic acid (MSA) for the simple, rapid, selective, and cost-effective detection of trace Fe(III) ions in water was developed. To the best of our knowledge, this is the first report of using mercaptosuccinic acid-functionalized AuNPs as a colorimetric sensor for the detection of trace levels of Fe(III) in aqueous media. Milli-Q-purified water was obtained using a Milli-Q Simplicity system from Millipore (Bedford, MA, USA) and used to prepare all aqueous solutions
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
