仪器分析法测定萤石球中氟化钙含量  

Determination of calcium fluoride content in fluorite spheres by instrumental analysis

作　　者：于辉 曹建虎 高伟伟 任新桃 YU Hui;CAO Jianhu;GAO Weiwei;REN Xintao(Jingye Group Physical and Chemical Testing Center,Shijiazhuang 050400,China)

机构地区：[1]敬业集团理化检测中心,河北石家庄050400

出　　处：《物理测试》2022年第6期30-32,共3页Physics Examination and Testing

摘　　要：应用仪器法测定莹石球中氟化钙含量,以缩短检测时间,提高工作效率。试验选用萤石标样、石灰石标样,采用熔融法制片X射线荧光光谱法测定总钙、氧化镁含量;用碳硫仪测定总碳含量,将总碳含量减去碳酸镁中碳含量得到碳酸钙中碳含量,换算得氟化钙的含量。方法精密度好,相对标准偏差(RSD)为0.35%;方法准确度高,测定值与化学法测定值基本相符,能够满足生产需要。The content of calcium fluoride in fluorite sphere was determined by instrumental method to shorten the detection time and to improve the work efficiency. The standard samples of fluorite and limestone were used in the experiments. The total content of calcium and magnesium oxide was determined by X-ray fluorescence spectrometry with fusion sample preparation. The content of total carbon was measured using carbon-sulfur analyzer. The content of carbon in calcium carbonate could be obtained by subtracting the content of carbon in magnesium carbonate from the total carbon. Then the content of calcium fluoride could be converted. The accuracy of the method was good, and the relative standard deviation(RSD) was 0.35%. The proposed method had high accuracy. The measured values were basically consistent with those obtained by the chemical method, which could meet the needs of production.

关 键 词：X射线荧光光谱法 总钙 氧化镁 碳硫仪 

分 类 号：P575[天文地球—矿物学]