In this work, we present the validation of the chemical method for total reflection X-ray fluorescence (TXRF) analysis of water, proposed as a standard to the International Standard Organization. The complete experimental procedure to define the linear calibration range, elements sensitivities, limits of detection and quantification, precision and accuracy is presented for a commercial TXRF spectrometer equipped with Mo X-ray tube. Least squares linear regression, including all statistical tests is performed separately for each element of interest to extract sensitivities. Relative sensitivities with respect to Ga, as internal standard, are calculated. Accuracy and precision of the quantification procedure using Ga as internal standard is evaluated with reference water samples. A detailed discussion on the calibration procedure and the limitation of the use of this method for quantitative analysis of water is presented.

在这项工作中，我们提出了对水进行全反射X射线荧光（TXRF）分析的化学方法的验证，该方法已作为国际标准组织的标准提出。对于配备Mo X射线管的商用TXRF光谱仪，提供了定义线性校准范围，元素灵敏度，检测和定量极限，精度和准确性的完整实验程序。最小二乘线性回归，包括所有统计检验，都是针对每个感兴趣的元素分别进行的，以提取灵敏度。计算相对于作为内标的Ga的相对灵敏度。使用参比水样评估使用Ga作为内标的定量程序的准确性和精密度。