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See Chinese contents: HJ 491-2019 HJ 491-2019: Soil and sediment - Determination of copper, zinc, lead, nickel and chromium - Flame atomic absorption spectrophotometry
This Standard specifies the flame atomic absorption spectrophotometry for the determination of copper, zinc, lead, nickel and chromium in soil and sediment. This Standard applies to the determination of copper, zinc, lead, nickel and chromium in soil and sediment. When the sample volume is 0.2 g and the constant volume after digestion is 25 ml, the method detection limits for copper, zinc, lead, nickel and chromium are 1 mg/kg, 1 mg/kg, 10 mg/kg, 3 mg/kg and 4 mg/kg, respectively, and the lower limits of determination are 4 mg/kg, 4 mg/kg, 40 mg/kg, 12 mg/kg and 16 mg/kg, respectively.
