Abstract： The interference effect of aluminum and its eliminating methods in the determination of rubidium in ore by flame atomic absorption spectrometry were studied. Experimental results showed that the aluminum in ore had interference in the determination of rubidium by flame atomic absorption spectrometry, and the higher the aluminum content while the interference more serious. The interference mechanism of aluminum to rubidium was discussed. The effect of several methods for eliminating interference of aluminum, such as separately adding releasing agent and complexing agent into the test solution, using the standard solution containing the same amount of aluminum as sample solution to prepare the calibration curve ,using (NH4)2CO3 to precipitate and separate was compared. The results showed that separation of aluminum, iron, calcium and magnesium in the test solution by (NH4)2CO3 precipitation was simple, and the determined result was accurate. This method was applicable to the determination of rubidium in ore.Rubidium in ore was determined by the method developed in this article, with relative standard deviation below 4.6%, the addition standard recovery between 97.8% to 101.4%, and the measured values of standard samples in consistency with the certified values.
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LI Cang-wei， FENG Chang-ge，HAO Xian-sheng，ZHAI Mu-jun ，WANG Jian，ZHANG Yong-san. Study on the interference of aluminum in the determination of rubidium by flame atomic absorption spectrometry. , 2012, 32(11): 31-35.
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