Figure AF6. Comparison of concentrations of B, Si, V, Mo, U, Mn, Fe, Cu, Zn, and Pb. 1-B = standard squeezing method using Milli-Q water, 2-C = GRIND method using Milli-Q water, 2-D = GRIND method using 100 µM CH3COONH4 solution, 2-E = GRIND method using diluted HNO3 solution with pH adjusted to 3, 2-F = GRIND method using diluted HNO3 solution with pH adjusted to 5. Error bar = 10% except where noted in the figure.
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