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NY/T85-1988-Determination of soil organic matter
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GB/T 14550-93 Soil quality-Determination of BHC and DDT-Gas chromatographic method
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GB/T 17140-1997 Soil quality-Determination of lead and cadmium-KI-MIBK extraction-Flame atomic absorption spectrophotometry
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GB/T 17141-1997 Soil Quality-Determination of Lead and Cadmium-Graphite Furnace Atomic Absorption Spectrophotometry
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