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Total nitrogen(standard sample)(in terms of N),51.8mg/L, H2O, 20ml
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Total nitrogen(standard sample)(in terms of N),0.518mg/L, H2O, 20ml
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Total nitrogen standard solution,1.5μg/mL, H2O, 20ml
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Total nitrogen standard solution(in terms of N),15mg/L, H2O, 20ml
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Total chromium(standard sample),1.84mg/L, H2O, 20ml
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Total chromium(standard sample),3.02mg/L, H2O, 20ml
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Total chromium(standard sample),0.196mg/L, H2O, 20ml
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Total chlorine(standard sample),1.03mg/L, H2O, 20ml
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Total chlorine(standard sample),4.15mg/L, H2O, 20ml
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Phosphorus ion(standard sample),1.80mg/L, H2O, 20ml
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Phosphorus ion(standard sample),10.1mg/L, H2O, 20ml
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