Quantifying Gold Nanoparticle Concentration in a Dietary Supplement Using Smartphone Colorimetry and Google Applications

Antonio R. Campos, Cassandra M. Knutson, Theodore R. Knutson, Abbie R. Mozzetti, Christy L. Haynes, R. Lee Penn

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Spectrophotometry and colorimetry experiments are common in high school and college chemistry courses, and nanotechnology is increasingly common in every day products and new devices. Previous work has demonstrated that handheld camera devices can be used to quantify the concentration of a colored analyte in solution in place of traditional spectrophotometric or colorimetric equipment. This paper extends this approach to quantifying the concentration of gold nanoparticles in a colloidal gold "dietary supplement". With the addition of free Google applications, the investigation provides a feasible, sophisticated lab experience and introduction to nanotechnology.

Original languageEnglish (US)
Pages (from-to)318-321
Number of pages4
JournalJournal of Chemical Education
Issue number2
StatePublished - Feb 9 2016

Bibliographical note

Funding Information:
This work was supported by White Bear Lake High School, National Science Foundation (No. NSF-0957696), and MRSEC (No. DMR-0819885) and Research Experiences for Undergraduates (REU) (No. DMR-1263062) Programs of the National Science Foundation. The authors would like to thank 2013-14 White Bear Lake AP Chemistry students for their participation in trial experiments.

Publisher Copyright:
© 2015 The American Chemical Society and Division of Chemical Education, Inc.

Copyright 2016 Elsevier B.V., All rights reserved.


  • Analytical Chemistry
  • First-Year Undergraduate/General
  • Hands-On Learning/Manipulatives
  • High School/Introductory Chemistry
  • Internet/Web-Based Learning
  • Laboratory Instruction
  • Nanotechnology
  • Physical Chemistry
  • UV-Vis Spectroscopy

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