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Mr. Girivyankatesh Hippargi
CSIR National Environmental Engineering Research Institute (NEERI) Nagpur
analytical chemistry
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 Ms. Sharmila Sajankila Nadumane

      
 Sir, I am working on optical detection of heavy metals using surface functionalized gold nanoparticles. For detection of As and Pb according to literature they are using 10.5 nm gold nanoparticles functionalized using glucose. I followed the same procedure mentioned in the paper but it is giving particle size of 15nm- 18 nm. At this particles size instead of detecting Pb and As, it is detecting mercury at 1 ppm and 500 ppb but as we decrease the conc of the heavy metals none of the metals are detected. And sometimes as we functionalize the gold nanoparticles it is aggregating even before the addition of the heavy metal. Kindly guide me in this. Thank you 2024-02-13 12:09:20
            

 Ms. Sharmila Sajankila Nadumane

      
 Sir, I am working on optical detection of heavy metals using surface functionalized gold nanoparticles. For detection of As and Pb according to literature they are using 10.5 nm gold nanoparticles functionalized using glucose. I followed the same procedure mentioned in the paper but it is giving particle size of 15nm- 18 nm. At this particles size instead of detecting Pb and As, it is detecting mercury at 1 ppm and 500 ppb but as we decrease the conc of the heavy metals none of the metals are detected. And sometimes as we functionalize the gold nanoparticles it is aggregating even before the addition of the heavy metal. Kindly guide me in this. Thank you 2024-02-13 12:09:20
            

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