XSeries 2 等离子体质谱仪应用于EPA200.8方法
abstract：
This Application Note describes the use of the Thermo Scientific XSERIES 2 ICP-MS for the analysis of drinking water, natural water and waste water using the US EPA method 200.8. It gives data showing compliance with each of the requirements and highlights the integrated system tools specifically designed to aid compliance. The data was generated using the procedures and solutions supplied in the Thermo Scientific EPA Method 200.8 Productivity Pack (Part Number 4600542).
instrument：
Conclusions：
The XSERIES 2 demonstrates compliance with the requirements of EPA Method 200.8 for a wide range of water sample types and easily copes with its stringent AQC requirements. A combination of specifically designed hardware and software tools enables and simplifies compliant analysis as outlined below.
Mass calibration and resolution checking is made simple with the custom Performance Report and peaks are easily set to the required width using the variable resolution function. The Performance Report also monitors and records the precision over five measurements, allowing a "Tune" sample to be tagged to each analytical run. Any deviations from acceptable performance are clearly flagged in red and the report ends with a simple, unambiguous Pass or Fail statement.
The unique Xt interface design produces low background equivalent concentrations, resulting in very low instrument and method detection limits (as seen in Table 6).It reduces the effective contribution of polyatomic species allowing robust, reproducible interference correction, and enhances stability when analyzing solutions containing high levels of matrix components, e.g. Ca, Na, Fe, Mg, K. This is demonstrated by the consistent CCV results and the stability of the internal standards. The unique response properties of this interface technology coupled with the dual mode simultaneous detector and, when necessary, high resolution mode, allow unrivalled linear range. This further improves productivity by reducing the number of dilutions required.
The PlasmaLab software has a built-in QC checking capability that is specifically designed to meet the requirements of EPA methods. Each QC type (ICV, CCV, LFM, etc) is available as a default in the QC set-up page and the user can also define his/her own QC tests, as required. The results display page visually flags results that are outside the allowed range making validation a simple process. Percentage recoveries can be automatically calculated for any QC sample or spiked sample and percentage differences can be calculated for DUP and SER samples. A variety of user-selectable automated actions can be set-up to ensure fully compliant analysis is achieved during an unattended run. PlasmaLab enables automated initiation of measurement and completion of washout using the intelligent Monitored Uptake / Washout features. This reduces the amount of non-productive time and maximizes useful analytical time.
The productivity tools in PlasmaLab in combination with the rapidity of the XSERIES 2 quadrupole and the low-volume sample introduction system result in the fastest analysis with complete compliance. Samples in this study were being processed at a speed of 1 sample every 2 minutes and 45 seconds, or 22 samples per hour. This makes the XSERIES 2 the ultimate ICP-MS for costeffective elemental analysis.
