m-Benzene disulfonic acid (BDS) as a superior accompanying acid for routine silicate rock analysis |
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Authors: | R.S. Cohen P. Hemmes J.H. Puffer |
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Affiliation: | 1. Department of Geology, Rutgers University, Newark, N.J. U.S.A.;2. Department of Chemistry, Rutgers University, Newark, N.J. U.S.A. |
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Abstract: | We recommend that m-benzene disulfonic acid (BDS) be used with hydrofluoric acid during the dissolution of silicate rocks and minerals for purposes of routine analysis of RO and R2O groups and trace elements. This recommendation is based on several properties that make it superior to the alternative acids. These properties include: (1) a relatively high boiling point (resulting in more effective removal of HF and silica); (2) the high solubility of virtually all salts of BDS; (3) the non-complexing characteristics of BDS salts; (4) the thermal stability of BDS (resulting in very slight degassing at elevated temperatures, thus reducing splattering); and (5) the safety of BDS compared with highly oxidizing acids such as perchloric. |
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