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Arsenic and Phosphorus in Coal

Code As   Mass fraction (10 -2 ) P   Mass fraction (10 -2 )
Value Certified Uncertainty Value Certified Uncertainty
GBW11115 0.0015 0.0001 0.031 0.002
GBW11116 0.0034 0.0002 0.007 0.001
GBW11117 0.0051 0.0003 0.092 0.005
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