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| 은나노물질을 포함한 수질시료의 보관조건 |
| 강문희1, 박솔1, 이상우1, 김현아2, 이병태2, 엄익춘3, 김순오1 |
1경상대학교 지질과학과 및 기초과학연구소
2광주과학기술원 환경공학부
3국립환경과학원 환경건강부 위해성평가연구과 |
| Preservation Conditions of Aqueous Samples Containing silver Nanomaterials |
| Mun Hee Kang1, Sol Park1, Sang-Woo Lee1, Hyun-A Kim2, Byung-Tae Lee2, Ig-chun Eom3, Soon-Oh Kim1 |
1Department of Geology and Research Institute of Natural Science, Gyeongsang National University
2School of Environmental Science and Engineering, Gwangju Institute of Science and Technology
3Division of Risk Assessment, Department of Environmental Health Research, National Institute of Environmental Research |
| Corresponding author |
Byung-Tae Lee ,Tel: 062-715-3315 , Fax: 062-715-3314, Email: btlee@gist.ac.kr
Soon-Oh Kim ,Tel: 055-772-1477, Fax: 055-772-1479, Email: sokim@gnu.ac.kr
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Received: March 11, 2015; Revised: April 7, 2015; Accepted: April 23, 2015. Published online: April 30, 2015. |
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| ABSTRACT |
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A prerequisite for precise quantification of nanomaterials contained in environmental samples is to prepare suitable preservation conditions of samples. This study was initiated to suggest preservation conditions of aqueous samples for analyses of metal nanomaterials. Variation in the size of silver nanomaterial (cit-AgNP) was observed according to change in various conditions, such as pH, electrolyte concentration, temperature, nanomaterial concentration, and time. Aggregation of AgNP was characterized for each environmental condition, and finally proper preservation conditions of samples were proposed based on experimental results on AgNP aggregation. In addition, the preservation period of sample was computed by the doublet time of AgNP. The results indicate that the aggregation rate of cit-AgNP was close to 0 at the conditions of pH of ≥ 7, electrolyte (Ca(NO3)2) concentration of ≤ 3 mM, temperature of 4℃, and cit-AgNP concentration of ≤ 2 mg/L. Furthermore, the experimental results on doublet time of cit-AgNP suggest that maximum preservation period was evaluated to be 15.79~17.53 days when the concentration of 100 nm cit-AgNP is assumed to be 1 µg/L which is considered as an environmentally-relevant concentration of engineered nanomaterials. Our results suggest that samples should be preserved at 4℃ and analyzed within 2 weeks. |
| Key Words:
Aqueous Sample, Preservation Condition, Metal Nanomaterial, Citrate Coated Silver Nanomaterial, Aggregation Characteristics, Doublet Time |
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