Fig. 5From: Laser ablation inductively coupled plasma mass spectrometry analysis of potash and m-Na-Al glasses in China- using Kernel methods for trace element analysisa Al2O3-CaO and b MgO-K2O concentrations (oxide%) for m-Na-Al glasses from Guangxi, Henan and other regions in South and Southeast Asia. Published data of m-Na-Al glass can be found in Additional file 2: Published data [29]Back to article page