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- W1557587726 abstract "The presented studies were aimed at the optimization ofreaction between nitric and formic acids in the solutions of low inorganic matrix content. The HNO 3 removal reaction took place at temperature above 60°C; the reaction products were gases and the reaction proceeded in 10 min. The change in the total acid content was controlled by acid-base titration; HNO 3 and HCOOH concentrations were determined separately using ICP spectral emission lines of nitrogen and carbon, respectively. Analytical curves of 10 elements were determined using a conventional ICP-OES method for the series of standard solutions with low (0.1 mol L -1 ) and high (2.2 mol L -1 ) HNO 3 content, as well as for the reaction mixtures containing initially 2.2 mol L -1 HNO 3 and 3.3 mol L -1 HCOOH. Compared with the reference conditions (0.1 mol L -1 HNO,), the average relative sensitivity was decreased by about 10% for high HNO 3 concentration, and a slight enhancement (about 4%) was caused by the residuals of HCOOH. Limitations concerning determination of mercury and the presence of hydrogen peroxide were discussed." @default.
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- W1557587726 date "2009-12-01" @default.
- W1557587726 modified "2023-09-23" @default.
- W1557587726 title "Studies on chemical removal of excess nitric acid using formic acid in solutions analyzed by inductively coupled plasma optical emission spectrometry" @default.
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