S Nookabkaew, N Rangkadilok… - Journal of agricultural …, 2006 - ACS Publications
Nineteen elements, Mg, Al, Ca, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Se, Sr, Sb, Ba, As, Cd, Hg, and
Pb, were determined in three types of popular herbal tea products, Gynostemma …