Abstract: The wavelength-dispersive X-ray fluorescence spectrometric method and pressed-disk technique were used to determine the contents of five heavy metals in the soil of a crop-intensive area. The grinding time, presser pressure, and matrix interference were investigated, and the experimental conditions were optimized. The method was employed for the rapid determination of Cr, As, Pb, Cu and Zn contents. The detection and quantitative limits of the method were approximately 1.5~2.0 mg/kg and 4.5~6.0 mg/kg, resectively. The precision experimert results showed that the relative standard deviation (RSD, n=5) of each component was between 2.6% and 7.9%. The error between the measured value of the national reference material and standard value is between -0.3% and 1.9%. The method was applied to the analysis of the actual sample, and the results thus obtained were consistent with those obtained through ICP–MS in the laboratory.

Key words: wavelength dispersion, X-ray fluorescence spectrometry, crop-intensive areas, heavy metals, pressed-disk technique