XRF for measuring Si/Al ratio

XRF spectrum of Cyclotella striata only shows Si Kα emissions after acid treatment meanwhile Al Kα emissions emerged after transformation of Cyclotella striata into aluminosilicate条纹小环藻（Cyclotella striata）的X射线荧光光谱（X-ray Fluorescence, XRF）经酸处理后仅显示硅Kα发射峰；当其转化为硅铝酸盐后，则出现了铝Kα发射峰。