【摘 要】
：
目的研究电感耦合等离子体质谱法(ICP-MS)测定粮食中16种稀土元素。方法样品采用微波消解,优化仪器的各项操作参数,考察了内标元素及方法的分析性能指标。结果测定了大米、玉
【机 构】
：
成都市疾病预防控制中心,成都市龙泉驿区疾病预防控制中心,
论文部分内容阅读
目的研究电感耦合等离子体质谱法(ICP-MS)测定粮食中16种稀土元素。方法样品采用微波消解,优化仪器的各项操作参数,考察了内标元素及方法的分析性能指标。结果测定了大米、玉米、面粉等粮食中16种稀土元素,相对标准偏差(n=6)在0.2%～2.1%之间,加标回收率在90.5%～109.0%之间,检出限小于0.007 ng/ml。结论建立的分析方法准确、灵敏、快速、简便,符合痕量元素分析要求。
Objective To study the determination of 16 rare earth elements in grain by inductively coupled plasma mass spectrometry (ICP-MS). Methods The samples were digested with microwave to optimize the operating parameters of the instrument. The analytical indexes of internal standard elements and methods were investigated. Results The results showed that the relative standard deviations (n = 6) ranged from 0.2% to 2.1%, and the recoveries were within the range of 90.5% -109.0% for 16 kinds of rare earth elements in rice, corn and flour. The detection limits were less than 0.007 ng / ml. Conclusion The established analytical method is accurate, sensitive, rapid and simple, and meets the requirements of trace element analysis.
其他文献
Salvianolic acid B(Sal B), an effective ingredient of Danshen(salvia miltiorrhiza root), has been shown to exhibit anti-oxidative and anti-inflammatory effects.
Our preliminary study demonstrated that neuropeptide Y (NPY)/nestin-positive cells exhibit a consistent spatial distribution in the hippocampus of normal adult
Inflammatory reactions are important pathophysiological mechanisms of ischemic brain injury. The present study analyzed the anti-inflammatory characteristics of
Skeletal muscle atrophy inevitably occurs in denervated skeletal muscle, and cell apoptosis plays an important role in skeletal muscle atrophy and degeneration.
Very little is known about visual functional recovery following long-term naltrexone administration in opioid-dependent patients. In the present study, a portab
目的建立一种高分子印记固相萃取-液相色谱质谱联用(MISPE-HPLC/MS2)测定水产品中孔雀石绿、结晶紫、亮绿及其代谢产物的检测方法。方法样品经乙腈提取后,经中性氧化铝柱和高
目的 基于慢性起搏犬左心房致房颤模型的建立,研究慢性房颤犬窦房结脂肪垫(SAN-FP)神经丛中Notch-1蛋白表达变化及Notch-1、NICD含量变化,阐明SAN-FP神经丛Notch信号通路与房
Acellular nerve allograft preserves the basilar membrane tube and extracellular matrix, which pro-motes selective regeneration of neural defects via bridging. I
Fentanyl is a potent and widely used clinical narcotic analgesic, as well as a highly selective μ-opioid agonist. The present study established a homologous mo