Highly sensitive colorimetric detection of lead using maleic acid functionalized gold nanoparticles

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Ratnarathorn N., Chailapakul O., Dungchai W.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2015

วารสาร: Talanta: The International Journal of Pure and Applied Analytical Chemistry (0039-9140)

Volume number: 132

หน้าแรก: 613

หน้าสุดท้าย: 618

จำนวนหน้า: 6

นอก: 0039-9140

eISSN: 1873-3573

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911095720&doi=10.1016%2fj.talanta.2014.10.024&partnerID=40&md5=e396931298115cc3eca7cdecaebc27a2

ภาษา: English-Great Britain (EN-GB)

ดูในเว็บของวิทยาศาสตร์ | ดูบนเว็บไซต์ของสำนักพิมพ์ | บทความในเว็บของวิทยาศาสตร์

บทคัดย่อ

Highly sensitive colorimetric detection for Pb2+ has been developed using maleic acid (MA) functionalized GNP. The -COOH on MA was used to modify GNP surface whereas the other -COOH functional group have strong affinity to coordination behavior of Pb2+ allowing the selective formation more than other ions. MA-GNPs solution changed from red to blue color after the addition of Pb2+ due to nanoparticle aggregation. The different optical absorption and discriminate of particle size between the MA-GNPs solution with and without Pb2+ were characterized by UV-visible spectroscopy and transmission electron microscopy (TEM), respectively. The color intensity as a function of Pb2+ concentration gave a linear response in the range of 0.0-10.0 μg L-1 (R2=0.990). The detection limit was found at 0.5 μg L-1 by naked eye and can be completed the analysis within 15 min. The MA-GNPs aggregated with Pb2+ showed high selectivity when was compared to other metal ions (As3+, Ca2+, Cd2+, Co2+, Cu2+, Fe3+, Hg2+, Mg2+, Mn2+, Ni2+, Pb2+ and Zn2+) and anions (Cl-, NO3 - and SO4 2-). Our proposed method was also applied for the determination of Pb2+ in real drinking water samples from 5 sources. The result of real water samples were not statistically significant different from the standard methods at the 95% confidence level (pair t-test method). Moreover, we evaluated our proposed method for the determination of trace Pb2+ concentration in real breast milk samples. The recoveries were acceptable and ranged from 101 to 104% for spiked Pb2+ in real breast milk samples. Thus, MA-GNP colorimetric sensing provides a simple, rapid, sensitive, easy-to-use, inexpensive and low detection limit for the monitoring of Pb2+. © 2014 Elsevier B.V. All rights reserved.

คำสำคัญ

Colorimetric sensing, Gold nanoparticles, lead