| A Study on Sample Preparation for the Analysis of Trace Elements in Foods of Animal Origin by Ultra High Pressure Microwave Digestion |
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Myoung-heon Lee1, Hee-su Lee1, Seong-wan Son1, Gab-soo Jung1, Jong-myung Park1, Sang-keun Kim2 |
1National Veterinary Research arui Quarantine Services
2College of Veterinary Medicine, Chungnam National University |
| 초고압초음파분해법을 이용한 축산물내 미량금속 잔류분석을 위한 시료전처리 방법 |
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이명헌1, 이희수1, 손성완1, 정갑수1, 박종명1, 김상근2 |
1국립수의과학검역원
2충남대학교 수의과대학 |
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| Abstract |
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Simple and rapid sample preparation method for trace elements in foods of animal origin using ultra high pressure microwave digestion system (UHP/MDS) and inductively coupled plasma atomic emission spectrometer (ICP/AES) were developed. 1. For the digestion of sample using UHP-MDS, 20% nitric acid (v/v) was the most suitable solvent for the determination of trace elements in foods of animal origin. 2. The optimal digestion conditions for UHP-MDS were as follows: final temperature $180^{circ}C$, final pressure 400 PSI, and magnetic power 900 W in the solid sample. For the liquid sample final temperature $170^{circ}C$, final pressure 300 PSI and magnetic power 700 W were optimal conditions. 3. As result of interlaboratory test, the average recovery rate of the for solid sample were 88.3~99.1% for As, 82.4~93.3% for Cd, 89.2~101.2% for Hg and 86.5~93.8% for Pb, respectively. In liquid sample, it were 87.0~96.8% for As, 80.9~96.6% for Cd, 87.5~91.2% for Hg and 91.4~95.5% for Pb, respectively. 4. The average coefficient variation rate were 3.3~15.9% for solid sample and 2.9~10.8% for liquid sample. |
| Key Words:
microwave digestion, foods of animal origin, trace elements |
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