方案摘要
方案下载应用领域 | 医疗/卫生 |
检测样本 | 全血/血清/血浆 |
检测项目 | |
参考标准 | - |
Trace selenium levels of the order of 20 μg/L are encountered in some neonatal serum samples as a result of selenium deficiency in the mother’s or infant’s diet [9]. Numerous analytical methods [1,5,6,7,9] have been published for the determination of selenium in blood and serum by GFAAS. This study describes the use of new instrumentation and procedures which are important in obtaining the maximum accuracy and precision. Selenium measurement suffers from a number of difficulties: ? The resonance wavelength of 196.0 nm is in the far UV region where both organic and inorganic compounds, likely to be present in the sample, will exhibit molecular absorption. This can be corrected using Zeeman background correction. Selenium in serum measured by Zeeman graphite furnance atomic absorption spectroscopy Application note Authors John Sanders Agilent Technologies, Melbourne, Australia Clinical research 2 ? The intensity of conventional hollow cathode lamps at this wavelength can cause limitations in the precision [6]. Boosted discharge lamps can increase the intensity of the light source, thus lowering noise levels. Selection of special photomultipliers can assist in providing superior response in this region of the spectrum. ? In this complex sample matrix, selenium may exist in any one of a range of chemical species which create atomization problems in the graphite furnace atomizer. This can be overcome by the use of chemical modifiers. ? Selenium is very volatile and can be lost during the ash stage. Suitable modifiers must be used to form compounds with the selenium and allow higher ash temperatures to remove as much of the matrix as possible before the analyte is atomized.
使用 Agilent InfinityLab 在线液相色谱 系统实现对流动化学反应器中反应过 程的实时监测
使用配备氦气节省模块以进行载气 切换的 Agilent 8850 气相色谱系统 分析香草提取物的方法转换
应用 QuEChERS 方法结合 Agilent 7000 系列三重四极杆气质联用仪测定甜菜中 的多农药残留
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