LIBS mapping was used to analyze and detect the elemental distribution of iron ore surface with self-developed software and 532 nm Nd∶YAG laser. 
self-developed software
Then, a self-made sample was homogeneously divided into three parts that was pressed by three different standard iron ore powders. 
self-made sample
The results showed that LIBS mapping technology could be used to achieve the qualitative analysis of component gradient distribution of the heterogeneous sample surface.
LIBS mapping technology