Simple Silver Nanoparticle Colorimetric Sensing for Copper by Paper-Based Devices

Details

• Personal Author:
  Chailapakul O ; Dungchai W ; Henry CS ; Ratnarathorn N
• Description:
  The first investigation of silver nanoparticle (AgNP) colorimetric sensing of Cu(2+) by paper-based analytical devices (PADs) is reported here. AgNP colorimetric sensing for the detection of Cu(2+) was first characterized by UV-visible spectroscopy. The -SH groups on homocysteine (Hcy) and dithiothreitol (DTT) were used to modify the AgNP surface whereas the -COOH and -NH(2) functional groups have strong affinity to Cu(2+) relative to other ions in solution. The plasmon resonance absorption peak intensity at 404 nm decreased and a new red-shifted band at 502 nm occurred in the presence of Cu(2+). Paper devices coated with the modified AgNP solution changed from yellow to orange and green-brown color after the addition of Cu(2+) due to nanoparticle aggregation. The color intensity change as a function of Cu(2+) concentration gave a linear response in the range of 7.8-62.8 uM (R(2)=0.992). The limit of naked-eye detection is 7.8 nM or 0.5 ug L(-1). A color change observed by the naked eye with the addition of Cu(2+) can be clearly differentiated from the other metals (As(3+), Cd(2+), Co(2+), Hg(2+), Ni(2+), Pb(2+), Zn(2+), Mg(2+), Mn(2+), Ca(2+), Fe(3+), Na(+), and K(+)) at 15.7 uM. The use of different flow directions in the PADs and uPADs for Cu(2+) detection was also demonstrated. Levels of Cu(2+) in real water samples were measured using the paper devices to be 2.9+/-0.24 uM (tap water) and 3.2+/-0.30 uM (pond water), respectively, and were within error of the values measured using an atomic absorption spectrometer (2.8+/-0.08 uM in tap water, and 3.4+/-0.04 uM in pond water). Thus, this work shows the successful integration of paper devices and AgNP colorimetric sensing as a simple, rapid, easy-to-use, inexpensive and portable alternative point-of-measurement monitoring. [Description provided by NIOSH]
• Subjects:
  Arsenic Cadmium Colorimetry Copper Ferrous Compounds Inorganic Chemicals Manganese Mercury Nickel Occupational Health Safety Spectrum Analysis

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• Keywords:
  Analytical Instruments Author Keywords: Silver Nanoparticle Calcium Cobalt Colorimeters Colorimetric Sensing Iron Magnesium Nanoparticles Nanotechnology Paper-based Devices Potassium Sampling Sensors Silver Sodium Spectrographic Analysis Zinc

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• ISSN:
  0039-9140
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Colorado ; OSHA Region 8
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  99
• NIOSHTIC Number:
  nn:20052120
• Citation:
  Talanta 2012 Sep; 99:552-557
• Contact Point Address:
  Wijitar Dungchai, Department of Chemistry ,Faculty of Science, King Mongkut's University of Technology Thonburi, Prachautid Road, Thungkru, Bangkok, 10140, Thailand
• Email:
  wijitar.dun@kmutt.ac.th
• CAS Registry Number:
  Cadmium (CAS RN 7440-43-9) ; Calcium (CAS RN 7440-70-2) ; Cobalt (CAS RN 7440-48-4) ; Copper (CAS RN 7440-50-8) ; Iron (CAS RN 7439-89-6) ; Lead (CAS RN 7439-92-1) ; Magnesium (CAS RN 7439-95-4) ; Manganese (CAS RN 7439-96-5) ; Mercury (CAS RN 7439-97-6) ; Nickel (CAS RN 7440-02-0) ; Potassium (CAS RN 7440-09-7) ; Silver (CAS RN 7440-22-4) ; Sodium (CAS RN 7440-23-5) ; Zinc (CAS RN 7440-66-6)
• Federal Fiscal Year:
  2012
• Performing Organization:
  Colorado State University - Fort Collins
• Peer Reviewed:
  True
• Start Date:
  20110701
• Source Full Name:
  Talanta
• End Date:
  20140630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:151dc0f600d3bbacfe81f34594df19ab3fb2af71e10a6cbd23ae90c4e8552ebfae677ead0d851c1571a716bad861e08cb5941df1874c50477f5112ff32a3d70f
• Download URL:
  https://stacks.cdc.gov/view/cdc/211710/cdc_211710_DS1.pdf
• File Type:
  [PDF - 670.83 KB ]