CAJ | 학술논문

目的：建立以亚临界水萃取(subcritical water extraction, SCWE)及电感耦合等离子体质谱(inductively coupled plasma mass spectrometry, ICP-MS)检测茶叶中铅(Pb)、铬(Cr)、镉(Cd)、砷(As)4种重金属元素残留量的方法。方法待测茶叶样品在5 MPa、150℃的亚临界条件下经提取15 min后,用ICP-MS测定。结果各目标物在1~50 mg/kg 范围内线性关系良好,相关系数均大于0.999。对茶叶基质进行1.0、5.0和10.0 mg/kg 三个水平的加标回收实验,4种重金属元素的回收率为70.19%~113.25%,相对标准偏差 RSD<8.2%。结论本方法的灵敏度、准确度和精密度均符合重金属元素残留测定的技术要求,适用于茶叶中重金属元素残留的检测。
목적：건립이아림계수췌취(subcritical water extraction, SCWE)급전감우합등리자체질보(inductively coupled plasma mass spectrometry, ICP-MS)검측다협중연(Pb)、락(Cr)、력(Cd)、신(As)4충중금속원소잔류량적방법。방법대측다협양품재5 MPa、150℃적아림계조건하경제취15 min후,용ICP-MS측정。결과각목표물재1~50 mg/kg 범위내선성관계량호,상관계수균대우0.999。대다협기질진행1.0、5.0화10.0 mg/kg 삼개수평적가표회수실험,4충중금속원소적회수솔위70.19%~113.25%,상대표준편차 RSD<8.2%。결론본방법적령민도、준학도화정밀도균부합중금속원소잔류측정적기술요구,괄용우다협중중금속원소잔류적검측。
Objective To develop aninductively coupled plasma mass spectrometry (ICP-MS) method with subcritical water extraction (SCWE) for the determination of heavy metals residues in tea, such as Pb, Cr, Cd and As. Methods Under the extraction pressure of 5 MPa, the test tea sample was extracted with subcriti-cal water at the temperature of 150℃for l5 minutes and then was determined by ICP-MS. Results The cali-bration curves showed a good linearity in the range of 1~50 mg/kg with r≥0.999. The recoveries of 4 harmful elements spiked in the tea at three levels of 1.0, 5.0, 10.0 mg/kg were from 70.19%to 113.25%with the relative standard deviations (RSD) lower than 8.2%. Conclusion The sensitivity, accuracy and precision of the me-thod could meet the technical standard of heavy metals residues determination. The method can be applied to the determination of heavy metals residues in tea.