Progress PPT -

1. Colorimetric Visual Sensor for Real-Time Detection of Heavy Metals

2. Effect of PEG molecular weight on Colorimetric response Optimization – PEG functionalized SNP PEG(200) PEG(600) PEG(1500) PEG(2000) Fixed parameters AgNO3 – 1mM Concentration of PEG – 2% pH – 7.4 Heavy metal concentration – 1000 ppm

3. UV graph of colorimetric response

4. UV graph of colorimetric response

5. Effect of starch concentration on Colorimetric response Optimization –Starch functionalized SNP Starch(1%) Starch(2%) Starch(5%) Starch(10%) Fixed parameters AgNO3 – 1mM pH – 7.4 Heavy metal concentration – 1000 ppm

6. UV graph of colorimetric response

7. UV graph of colorimetric response

8. Effect of pH on Colorimetric response p H 3 pH 7 pH 7.4 pH 8 Fixed parameters AgNO3 – 1mM Starch concentration – 2% Heavy metal concentration – 1000 ppm

9. UV graph of colorimetric response

10. UV graph of colorimetric response

11. Optimized parameters – Starch functionalized SNP AgNO3 – 1mM Starch concentration – 2% pH – 7.4 Heavy metal concentration – 1000 ppm Colorimeteric response of Starch functionalized AgNPs in the presence of heavy metals

12. APPLICATION DISTILLED WATER WASHED SAMPLE (BOX METHOD) 12

13. 13 Colorimeteric response of Starch- AgNPs /Agarose gel in the presence of heavy metals