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| 실시간 모드의 유도결합플라즈마 질량분석기술을 이용한금속나노입자의 분석 |
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김현아1, 이병태1, 나소영2, 김경웅1, 이우춘3, 김순오3, 이병천4 |
1광주과학기술원
2광주과학기술원 환경공학부
3경상대학교
4국립환경과학원 |
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| Abstract |
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Significant concern has been laid on the environmental safety of nanoparticles due to their exposure and toxicity to human and ecosystems. Among the research topics, detection and analysis of nanoparticles in the environmental matrix is regarded as the most important and pressing work. Owing to its precise and accurate analytical power to inorganics, inductively coupled plasma mass spectrometry (ICP-MS) is a very promising tool to detect metal nanoparticles in the environmental samples. Here, we introduced the principles and procedures of on Realtime Single Particle mode ICP-MS (RTSP-ICP-MS) technique and evaluated its applicability to citrate-coated silver nanoparticles (AgNPs). RTSP-ICP-MS determined AgNPs of 60 nm and 100 nm to 53.0±7.4 nm and 103.6±13.8 nm, respectively, which were the number-weighted average sizes. Comparative measurements suggested that sizes by Transmission Electron Microscopy (TEM) were 60.1±3.7 nm and 96.8±9.5nm and z-averages by Dynamic Light Scattering (DLS) were 59.1±0.2 nm and 95.3±0.8 nm, respectively. The results prove the feasibility of RTSP-ICP-MS for metal-nanoparticles. We have many challenges to be overcome for detection and measurement of metal nanoparticles in environmental samples such as fresh water,wastewater, sludges, sediments and soils. |
| Key Words:
Realtime single particle mode ICP-MS (RTSP-ICP-MS), Metal nanoparticles, Particle size, Size distribution |
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