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Chemical oxygen demand(standard sample),66.1mg/L, 20ml
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Chemical oxygen demand(standard sample),83.2mg/L, 20ml
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Chemical oxygen demand(standard sample),120mg/L, 20ml
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Chemical oxygen demand(standard sample),176mg/L, 20ml
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Chemical oxygen demand(standard sample),275mg/L, 20ml
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Chemical oxygen demand(standard sample),496mg/L, 20ml
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Chemical oxygen demand(standard sample),746mg/L, 20ml
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Chemical oxygen demand(standard sample),1488mg/L, 20ml
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Total hardness of water(standard sample)(in terms of calcium carbonate),27.8mg/L, matrix: H2O, 20ml
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Total hardness of water(standard sample)(in terms of calcium carbonate),60.4mg/L, matrix: H2O, 20ml
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Total hardness of water(standard sample)(in terms of calcium carbonate),98.4mg/L, matrix: H2O, 20ml
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