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Liu W.-F.,Minerals Test Center Sinosteel Tianjin Geological Academy Co | Ying W.-H.,Minerals Test Center Sinosteel Tianjin Geological Academy Co
Yejin Fenxi/Metallurgical Analysis | Year: 2011

The uncertainty sources in the determination of arsenic in manganese ore by hydride generation-atomic fluorescence spectrometry were discussed. The results indicated that the uncertainty was mainly from the weighing of sample, dilution volume of testing solution, preparation of standard solution, calibration curve fitting and measurement repeatability of testing solution. Through evaluating the components of uncertainty, the combined standard uncertainty was obtained. The expanded uncertainty was obtained by multiplying the combined standard uncertainty by expanded factor (2) under the confidence level of 95%. Finally, the determination results of arsenic containing expanded uncertainty were provided. Source


Liu W.-F.,Minerals Test Center Sinosteel Tianjin Geological Academy Co | Ying T.-Y.,Minerals Test Center Sinosteel Tianjin Geological Academy Co | Wang L.,Minerals Test Center Sinosteel Tianjin Geological Academy Co | Sun F.-T.,Minerals Test Center Sinosteel Tianjin Geological Academy Co
Yejin Fenxi/Metallurgical Analysis | Year: 2014

The sample was dissolved with hydrochloric acid-hydrofluoric acid and fluorine was removed with perchloric acid smoking. In dilute hydrochloric acid, the aluminum oxide, magnesium oxide and phosphorus in calcium ferrite was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) at 396.152 nm for aluminum, 285.213 nm for magnesium and 178.287 nm for phosphorus. The matrix effect and spectral line interference was respectively removed with matrix matching and spectral line background deduction method. It showed that the concentration of aluminum oxide, magnesium oxide and phosphorous in calcium ferrite showed a good linear relationship with its intensity within certain range with correlation coefficient higher than 0.9998. Through accuracy and precision test, the standard addition recovery of the three elements were between 99%-104% and the relative standard deviation (RSD) was between 0.45%-1.5%. The determination results of practical calcium ferrite samples were consistent with those of wet analysis. Source

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