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| METHOD OF DETERMINING THE CONCENTRATION OF NITRITE IN ZINC HYDROMETALLURGY BY ULTRAVIOLET-SPECTROPHOTOMETRY |
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Received:June 27, 2011
Published Online:March 18, 2012
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| DOI：10.3969/j.issn.1005-7854.2012.01.026 |
| KeyWord:ultraviolet-spectrophotometry; nitrite; zinc hydrometallurgy |
| Author | Institution |
| LIANG Long-wei |
Kunming University of Science and Technology，Kunming，China |
| ZHANG Xu |
Kunming University of Science and Technology，Kunming，China |
| LIU Yong-shuai |
Kunming University of Science and Technology，Kunming，China |
| MAO Sheng-hua |
Kunming University of Science and Technology，Kunming，China |
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| Abstract: |
| In the medium of hydrochloric acid, without colour-display reagent, scanning on the ultraviolet-visible spectrophotometer within wavelength range of 300～400 nm, the absorbency in 359.0nm can be read and the concentration of nitrite can be calculated by working curve, which establishes a simple, sensitive and highly- selective method to measure the solution of zinc hydrometallurgy. According to the law of Beer as the concentration of nitrite within the range of 5～200mg/L, the mole absorption coefficient is 3.68×104L?mol-1?cm-1, the limit of this method is 5.36mg/L. the standardized recovery of real samples is between 100%～105%. By this method, some measurements have been done to the solution of secondary refine and solution of electrowinning from a factory respectively, with relatively satisfied results. |
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