使用X射线荧光光谱法的无标样半定量软件对工业碳酸锶进行分析,用模压法在15 MPa压力下压制30 s,将粉状碳酸锶制成片样,并对其中的锶、钡、钙、硫等元素的含量进行了检测.其中主成分碳酸锶的测定偏差小于0.3%,平行测定11次的相对标准偏差为0.034%.对于工业碳酸锶中碳酸钡杂质的含量进行了曲线拟合,拟合后的结果与化学值基本一致.应用此方法一个样品测定时间只需要16 min.

Strontium,barium,calcium and sulfur in insudtrial strontium carbonate was determined by XRFS using the IQ+software instead of standard samples.The disc-sample for XRFS analysis was prepared from strontium carbonate powder sample by mould-pressing under a pressure of 15 MPa for 30 s,using starch as adhesive.Accuracy of the proposed method was proved by checking the analytical results with the results obtained by the chemical method (HG/T 2969-1999) in analyzing 10 samples.As shown by the data,for the content of SrCO3,deviation of less than 0.3% from the results of chemical method was found,and value of RSD (n=11) found was 0.034%.Significant deviations were found for the results of BaCO3 in the sample,and this problem was solved by applying the curve-fitting method,thus making the results to be in consistency.Only 16 min were required for analysis of a sample by this method.