Determination of Soluble Silica in Very Low Concentrations

Silicate Assimilation by Diatoms

“…In tbe metbods used for silicon determination (Bunting 1944) as described in the present article the interference of phosphate is prevented by adding tartaric acid to tbe sample in question after tbe olber reagents bave been dispensed. It bas been sbown hy different autbors that oxalic and cilric acid liave tbe same effect (see references in Bunting 1944 andArmstrong 1951).…”

Rapid analysis of silicate, carbonate, and phosphate rocks: Revised edition

“…Dilute to volume, mix, and transfer to polyethylene bottles. A ~molybdenum blue method is used for the determination of silica (Si0 2 ) (Bunting, 1944). As in the preparation of solution A, factors that govern precision should be given particular attention in order to avoid errors that might •seriously affect accuracy.…”

Phosphate equilibria in arable soils different in soil type and management

“…(192) PHOSPHATE EQUILIBRIA IN ARABLE SOILS of the supernatant · was measured with a · glass electrode: The remaining portion of the suspension was filtered and the solution was analyzed colorimetrically for phosphorus (16), aluminum (17), silicon (18) and sometimes for iron (19). The sum of calcium and magnesium was determined by titration with EDT A.…”