Related Experiment Video
Updated: May 21, 2026

Biofunctionalized Prussian Blue Nanoparticles for Multimodal Molecular Imaging Applications
Published on: April 28, 2015
Colorimetric method for determining Pb2+ ions in water enhanced with non-precious-metal nanoparticles
1YTC (Yazaki Technology Center) America Inc., Camarillo, California 93012, United States.
Abstract:
Sulfur anions and their derivatives have long been recognized for their high selectivity and reactivity toward Pb(2+) ions and formation of highly absorptive yet water-insoluble compounds with both acid and base media. This phenomenon has been used for qualitative analysis of lead ions in water. We demonstrate a new method to quantitatively determine the Pb(2+) concentration in the range of 0.5-500 ppm in water using colorimetric measurement, based on forming "soluble" lead sulfide in water enhanced with non-precious-metal nanoparticles. This method has inherent high selectivity for lead over other alkali-metal and alkaline-earth-metal ions. The colorimetric measurements of the absorptive solutions provide accurate determination of the lead concentration in water comparable to that measured using inductively coupled plasma mass spectrometry. To our knowledge, this is the simplest, lowest cost, and easiest-to-use method for detecting and determining the lead concentration in water.
More Related Videos
05:35Quantification of Metal Leaching in Immobilized Metal Affinity Chromatography
Published on: January 17, 2020
10:31Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores
Published on: December 6, 2015
Related Concept Videos
Photoluminescence: Applications
Extraction: Advanced Methods
Precipitation and Co-precipitation
Precipitation Titration: Endpoint Detection Methods
In the Volhard method, a standard excess of AgNO3 is first added to the...
Gravimetry: Inorganic And Organic Precipitating Agents