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Li Z.-P.,Shandong Zhengyuan Geological Exploration Institute
Wutan Huatan Jisuan Jishu | Year: 2014

For the strong negative magnetic anomaly caused by ultrabasic rock, a combination of four methods including Koenigsberger ratio, the plane characteristics of magnetic anomaly, short period geomagnetic perturbation and magnetic anomaly profile forward has been used. The strong negative magnetic anomaly is identified from two aspects of qualitative and quantitative combining with the magnetic parameters of the samples. Strong negative magnetic anomaly caused by the ultrabasic rock body has the characteristics of residual magnetization field, which is consistent with the drilling results and avoid blind drilling.

Li C.-W.,Shandong Zhengyuan Geological Exploration Institute | Feng C.-G.,Shandong Zhengyuan Geological Exploration Institute | Hao X.-S.,Shandong Zhengyuan Geological Exploration Institute | Zhai M.-J.,Shandong Zhengyuan Geological Exploration Institute | And 2 more authors.
Yejin Fenxi/Metallurgical Analysis | Year: 2012

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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