Elemental ratio distribution occurring in individual particles in a representative water sample (G1, 17 February 2016): (a) Ti to Al, (b) Ti to Si, (c) Ti to Fe, (d) Ti to Ce, (e) Ti to Zr, (f) Ti to Nb, (g) Ti to Ba, and (h) Ti to Pb. The average river particulate elemental ratios, average crustal elemental ratios, or elemental ratio in natural minerals are also presented for comparison. The mean elemental ratios and the number of counted particles are presented in the figures.