Abstract: Hexavalent chromium is a toxic and carcinogenic element.The mass concentration limit of hexavalent chromium in the leaching solution was 5 mg/L stipulated in the Identification Standard of Hazardous Waste of the Identification of Leaching Toxicity，GB 5085.3—2007.According to GB 5085.3—2007 and Solid Waste Determination of Hexavalent Chromium，HJ 687—2014，the determination of hexavalent chromium in solid waste for method validation was made by inductively coupled plasma-atomic emission spectrometry（ICP） and atomic absorption spectrometry（AA）.At the same time，hexavalent chromium was also determined in 13 solid waste samples from a Shanghai company.Results showed that ICP and AA were both able to determine the concentration of hexavalent chromium in the leaching toxicity of solid waste，and linearity，accuracy，and precision all could be accepted in method validation.No significant difference between the two methods in the determination of the concentration of hexavalent chromium.In 13 samples of solid wastes，hexavalent chromium concentrations of 4 samples′ leaching solution was above 5 mg/L.Therefore，they were convicted of hazardous wastes.

Key words: chromium（Ⅵ）, inductively coupled plasma-atomic emission spectrometry, atomic absorption spectrometry