Method for analyzing content of hexavalent chromium in coal ash through ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometer) method

The invention provides a method for analyzing the content of hexavalent chromium in coal ash through an ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometer) method, and relates to the technical field of analyzing testing methods. The method comprises the steps: performing microwave alkaline digestion on a coal ash sample, co-precipitating to separate trivalent chromium, and measuring the content of hexavalent chromium through the ICP-OES. The method has the characteristics of being fast to analyze, high in sensitivity, high in accuracy and precision, small in matrix interference, and wide in linear scope; the average recovering rate reaches 87.2%; and the detection limit is low to 0.00033 mcg/ml. 本发明提供种ICP-OES法分析煤灰中六价铬含量的方法，涉及分析测试方法技术领域，本发明方法包括：煤灰样品微波碱消解、共沉淀分离三价铬、ICP-OES测定六价铬含量。本发明ICP-OES法分析煤灰中六价铬含量的方法，具有分析速度快、灵敏度高、准确度和精密度较高、基体干扰小、线性范围广等特点，回收率平均值达到87.2％，检出限低至0.00033μg/ml。