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Stability of Elements at ppb Concentration Levels

Ion; Concentration;Duration of Experiment(h = hour)MaterialpH where Adsorption IS significantpH where Adsorption IS NOT significant
Ag; 1ppm; 1h PE; PTFE pH 2-12 "acid solution"
Al(III); 1-10ppm; 24h borosilicateglass pH 3.5-11 pH<1.5; pH>13
Ca(II); 0.5-2ppm; 24h borosilicateglass pH 8-12 pH 1.5
Cr(III); 1-5ppm; 24h borosilicateglass pH 3.5-12 pH 1.5
Pb(II); 10-13ppm; 24h borosilicateglass pH 3.5-12 pH 1.5