Survey of Colloid Silver Stability for LSPR Spectrum in Determination of Dextrose with Nanoparticles senthesis Method

In a green chemistry method, determination of dextrose with a method based on silver nanoparticles (AgNPs) formation was investigated. Colloid silver nanoparticles were synthesized in the natural polymeric matrix of gelatin. The localized surface plasmon resonance (LSPR) Spectrum were characterized with UV–Vis spectroscopy. Stability of silver nanoparticles was investigated for standard sample with concentration 0.02 M of dextrose at intervals of 20 to 280 min. No changes in the LSPR situation showed the stability of the nanoparticles. Also, the stability was studied in a period of three months. Samples were stored at room temperature and the UV–Vis spectrum was obtained in the range of 300 to 800 nm after the formation of colloid silver yellow and after a day, three days, six days, thirty days, sixty to ninety days. The results, were not showed any significant differences in position and the symmetry of the absorption peak at the time was mentioned. Figur (1-2) confirms the lack of significant changes in absorbance intensity and wavelength of maximum during stability of three month for nanoparticles made.In addition, stability of silver nanoparticles was monitored through UV-Vis spectrophotometer at time intervals of 20,40,60,80,100,120,140,160,180,200,220,240,260 and 280 min .The results confirm the lack of significant changes in absorbance intensity and maximum wavelength during the stability period of three months for nanoparticles made. There is no shift in the maximum absorbance. Incremental changes of absorbance over time is probably due to aggregation. [1-3]