Skrzeczanowski Wojciech, Długaszek Maria
Institute of Optoelectronics, Military University of Technology, ul. gen. Sylwestra Kaliskiego 2, 00-908 Warsaw, Poland.
Materials (Basel). 2022 May 23;15(10):3736. doi: 10.3390/ma15103736.
Results of laser-induced breakdown spectroscopy measurements of K, Na, Ca, and Mg content in liquid media are discussed in the paper. Calibration results show correct parameters-linearity and R coefficients of determination at the levels of 0.94-0.99. Obtained regression equations have been used to determine K, Na, Ca, and Mg concentrations in biological samples with known element content. Measurement results showed acceptable, within the expanded standard uncertainty, conformity with their content in the certified materials. Results have been supported by multivariate factorial analysis, which was especially effective for Ca and Mg samples. For these elements, factorial analysis allows the application of the whole spectra to obtain quantitative data on the tested samples, in contrast to a common method based on the selection of a particular spectral line for the calibration.
本文讨论了液体介质中钾、钠、钙和镁含量的激光诱导击穿光谱测量结果。校准结果显示了正确的参数——线性以及0.94 - 0.99水平的决定系数R。所获得的回归方程已用于测定已知元素含量的生物样品中钾、钠、钙和镁的浓度。测量结果在扩展标准不确定度范围内显示出与认证材料中的含量相符，是可接受的。结果得到了多因素分析的支持，这对钙和镁样品尤其有效。对于这些元素，与基于选择特定光谱线进行校准的常用方法相比，因子分析允许应用整个光谱来获取测试样品的定量数据。
