"The development of analytical technology for inorganic engineer
「"The development of analytical technology for inorganic engineer」於資料集「EPQSummary_EnvironmentalMonitoringAndTesting」由單位「行政院環境保護署」的陳先生所提供，聯繫電話是02-2311-7722#2386，最近更新時間為：2023-07-30 01:01:45。 欄位Project Title的內容是"The development of analytical technology for inorganic engineered nanoparticles in aquatic environme" ， 欄位Project Subject的內容是"This study aims to establish a measuring technique for the inorganic engineered nanoparticles in the aquatic environment, including how to apply the analytical technologies to determine the size distribution and concentration of nanoparticles in water. The average particle sizes of three commercial silver nanoparticles (AgNPs) suspensions measured by dynamic light scattering (DLS) were 79.86, 80.6 and 122 nm for AgNP-A, B and C, and 1663 nm was for AgNP-D. In three wastewater samples and three environmental samples, the particle sizes were multimodal distribution. They have different ion contents, the pH values were around 6.9-8.5 and the conductivities were between 375-11200 μS/cm. The stability of AgNPs was evaluated by adding AgNPs into these samples. Different levels of aggregation and dissolution were observed. Samples should be stored under a lower temperature such as 4℃ without pH adjustment, in the dark, and analyzed as soon as possible. For the pretreatment process, the separation of different particle sizes was suggested by the centrifugation with centrifugal speed of 4000 G for 2 minutes, which has 71 % recovery. The filtration is not suggested as a pretreat process. To quantify the concentration of nanoparticles, the best process is to use 70 % nitric acid to digest samples before inductively coupled plasma-mass spectrometer (ICP-MS) analysis. For the HDC analysis, the correlation between particle size and retention time was determined. pH 10 pure water was chosen as the eluent for the HDC experiment due to its good correlation coefficient. The calibration curves established in pure water can predict the size of AgNPs in different water samples and compare well to the size results from DLS. The size of silver in the recovered eluent could be confirmed by electron microscopy. The results of this study establish a preliminary technique to measure the nanoparticles in aquatic environment and a draft for DLS and HDC analysis." ， 欄位Project Year的內容是2014 ， 欄位Organizer的內容是"Environmental Analysis Laboratory" ， 欄位Executive Unit的內容是"國立臺灣大學農業化學系" ， 欄位Reporting download URL的內容是https://epq.epa.gov.tw/project/filedownload.aspx?fid=87457 ， 欄位Publish Date的內容是20150501 。
Project Title
"The development of analytical technology for inorganic engineered nanoparticles in aquatic environme"
Project Subject
"This study aims to establish a measuring technique for the inorganic engineered nanoparticles in the aquatic environment, including how to apply the analytical technologies to determine the size distribution and concentration of nanoparticles in water. The average particle sizes of three commercial silver nanoparticles (AgNPs) suspensions measured by dynamic light scattering (DLS) were 79.86, 80.6 and 122 nm for AgNP-A, B and C, and 1663 nm was for AgNP-D. In three wastewater samples and three environmental samples, the particle sizes were multimodal distribution. They have different ion contents, the pH values were around 6.9-8.5 and the conductivities were between 375-11200 μS/cm. The stability of AgNPs was evaluated by adding AgNPs into these samples. Different levels of aggregation and dissolution were observed. Samples should be stored under a lower temperature such as 4℃ without pH adjustment, in the dark, and analyzed as soon as possible. For the pretreatment process, the separation of different particle sizes was suggested by the centrifugation with centrifugal speed of 4000 G for 2 minutes, which has 71 % recovery. The filtration is not suggested as a pretreat process. To quantify the concentration of nanoparticles, the best process is to use 70 % nitric acid to digest samples before inductively coupled plasma-mass spectrometer (ICP-MS) analysis. For the HDC analysis, the correlation between particle size and retention time was determined. pH 10 pure water was chosen as the eluent for the HDC experiment due to its good correlation coefficient. The calibration curves established in pure water can predict the size of AgNPs in different water samples and compare well to the size results from DLS. The size of silver in the recovered eluent could be confirmed by electron microscopy. The results of this study establish a preliminary technique to measure the nanoparticles in aquatic environment and a draft for DLS and HDC analysis."
Project Year
2014
Organizer
"Environmental Analysis Laboratory"
Executive Unit
"國立臺灣大學農業化學系"
Reporting download URL
Publish Date
20150501
「"The development of analytical technology for inorganic engineer」所屬的資料集：「EPQSummary_EnvironmentalMonitoringAndTesting」的其他資料
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