The correlation coefficientr of the aqua regia and XRF analysis results was 0.88,which was a respectable value, indicating that the results of the XRF analysis and aqua regia extraction were uniform
The correlation coefficientr of the aqua regia andXRF analysis results was 0.88,which was a respectable value,indicating that the results of the XRF analysis and aqua regiaextraction were uniform