Method for determination of content of lead in chrome ore
A determination method and technology of lead content, which is applied in the preparation of test samples, fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems that are not suitable for the determination of lead in chrome ore, and achieve stable fusion sample results, ensure stability, well-designed effects
Active Publication Date: 2015-11-18
LIANYUN PORT IMMIGRATION INSPECTION & QUARANTINE BUREAU PEOPLES REPUBLIC OF CHINA
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Abstract
A method for determination of the content of lead in a chrome ore comprises the steps: mixing sodium peroxide with the lead-containing chrome ore in a corundum crucible, melting at the temperature of 600-700 DEG C, then dissolving a precipitate and acidifying the melt with a hydrochloric acid solution and water, diluting with water, mixing evenly, and thus obtaining a sample solution; mixing evenly a hydrochloric acid solution and water with the same volume as that for preparation of the sample solution, to obtain a blank solution; respectively transferring at least five different volumes of lead standard solution with the mass concentration of 0.25 [mu]g/mL in a group of volumetric flasks, adding the blank solution, diluting with water, and thus obtaining the calibration solutions; and finally, testing in an atomic fluorescence spectrometer, to obtain a standard working curve of the calibration solutions, so as to test the content of lead in the chrome ore. With adopting of sodium peroxide to melt the chrome ore, the dissolution time is short, and the determination results are stable; the melting temperature is selected in the range of 600-700 DEG C, so that the sample complete melting can be met, and the molten sample result is stable; and with the calibration solutions as the benchmark, the measurement accuracy is improved.
Application Domain
Preparing sample for investigationFluorescence/phosphorescence
Technology Topic
FluorescenceVolumetric flask +9
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