卡尔曼滤波分光光度法同时测定铁矿石中钙和镁

Simulatneous Determination of Calcium and Magnesium in Iron Ores Based onKalman-filtering Spectrophotometry

本文采用卡尔曼滤波算法，以酸性铬蓝Ｋ与钙、镁的显色体系同时测定钙和镁，利用单纯形优化法确定显色反应的最佳条件，基于测量数据精密度的要求选择了合适的测量波长范围，同时以甲基异丁基酮草取及氢氧化物沉淀法分离共存的干扰离子，用于实际铁矿石样品分析，所得结果较满意。

alman-filtering spectrophotometry isdescribed in this paper for simultaneous de-termination of calcium and magnesium in Ca(Mg)-acid chrome blue K system.The modi-fied simplex method is used to determine the optimum conditions of complexing reac-tions, The suitable range of measuring wave-lengths is selected on the basis of the de-mand for the precision of measuring data.The interference from some common ionscan effectively be eliminated by methylisobutyl ketone(MIBK)extraction and hy-droxide precipitation, The method has beenapplied to determine calcium and magnesiumin iron ores and tap water with satisfactoryresults.