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Analytical Technology Study for Environmental Nanoparticle and Green Chemistry(1/3)-Separation and I

Absrtact	The main purpose of this project is to develop separation and identification analytical method for nanoparticle in water. During this study, the well installed and running system include: Asymmetrical Field-Flow Fractionation System、Detection System And Fraction Collection System. The overall function is to separate and identify the nanoparticle via size from small to big and be collected after fractionation. The fractionated sample would be analyzed through Pyrolysis-GCMS and ICP-MS to acquire the composition information on organic compound and heavy metal. The nanoparticle separation analytical method developing is to evaluate performance difference between the two membrane, PES and RC which will run with four mobile phase including：water+200ppm NaN3、1 mM NH4NO3+200ppm NaN3、10 mM NH4NO3+200ppm NaN3、0.05%SDS+200ppm NaN3. The tested samples are three：wastewater effluent from local research institute、reservoir water and tap water. The nanoparticle size on both reservoir water and tap water could not be detected due to the low concentraction. The analysis result of waste water showed that RC had beter RSD than PES, PES had selfaggregation and adsorption on its surface but RC had none of it. Besides, the higher intensity of ion strength, the lower moving speed for all the nanoparticle during separation. This would be help to separate the small size of nanoparticle. The overall required elution time is as following. Water <1mM NH4NO3 <10mM NH4NO3 In conclusion, with the sampes we studied, RC is better than PES to be considered as separation membrane. The whole system of Asymmetrical Field-Flow Fractionation is well established and the analysis ethid is proved and could be used to separate and identify nanoparticle in water. The best combination of membrance and mobile phase would be10 mM NH4NO3 + 200ppm. For the future, it is necessary to increasing the tested samples from different kinds of water body to check the applicability of developed Asymmetrical Field-Flow Fractionation method.
Keyword	Asymmetric Flow Field-Flow-Fractionation (AF4)、Multi-Angle Light Scattering (MALS)、Nanoparticle

Absrtact

The main purpose of this project is to develop separation and identification analytical method for nanoparticle in water. During this study, the well installed and running system include: Asymmetrical Field-Flow Fractionation System、Detection System And Fraction Collection System. The overall function is to separate and identify the nanoparticle via size from small to big and be collected after fractionation. The fractionated sample would be analyzed through Pyrolysis-GCMS and ICP-MS to acquire the composition information on organic compound and heavy metal. The nanoparticle separation analytical method developing is to evaluate performance difference between the two membrane, PES and RC which will run with four mobile phase including：water+200ppm NaN3、1 mM NH4NO3+200ppm NaN3、10 mM NH4NO3+200ppm NaN3、0.05%SDS+200ppm NaN3. The tested samples are three：wastewater effluent from local research institute、reservoir water and tap water. The nanoparticle size on both reservoir water and tap water could not be detected due to the low concentraction. The analysis result of waste water showed that RC had beter RSD than PES, PES had selfaggregation and adsorption on its surface but RC had none of it. Besides, the higher intensity of ion strength, the lower moving speed for all the nanoparticle during separation. This would be help to separate the small size of nanoparticle. The overall required elution time is as following. Water <1mM NH4NO3 <10mM NH4NO3 In conclusion, with the sampes we studied, RC is better than PES to be considered as separation membrane. The whole system of Asymmetrical Field-Flow Fractionation is well established and the analysis ethid is proved and could be used to separate and identify nanoparticle in water. The best combination of membrance and mobile phase would be10 mM NH4NO3 + 200ppm. For the future, it is necessary to increasing the tested samples from different kinds of water body to check the applicability of developed Asymmetrical Field-Flow Fractionation method.

Keyword

Asymmetric Flow Field-Flow-Fractionation (AF4)、Multi-Angle Light Scattering (MALS)、Nanoparticle