使用激光剥蚀与 Agilent 7900 ICP-MS 联用定量分析高纯度金属

Laser Ablation-ICP-MS (LA-ICP-MS) is used for the elemental analysis of solid samples and powders, including geological materials, ceramics, biological tissue and forensic samples. In this study, two calibration strategies (matrix matching and non-matrix matching) were used for the quantitative analysis of high purity metals. Since solid samples can be analyzed directly using LA-ICP-MS, minimal sample preparation is required compared to standard liquid sample introduction. This reduces the risk of analyte loss and eliminates the introduction of contaminants by avoiding the dissolution process. However, accurate quantitative analysis can be problematic for LA-ICP-MS analysis, due to lack of solid calibration standards. Preparing calibration standards for the analysis of solids is more difficult than for liquid sample analysis, and matrix-matched solid calibration standards that contain the analytes at suitable concentrations are rarely available. In a few cases, such as the metals industry, well-characterized, matrix-matched standards may already be available, since established analytical techniques such as Arc/Spark or Glow Discharge (GD) Optical Emission Spectroscopy (OES) utilize solid standards.