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National Sharing Platform for Reference Materials
Sponsor：National Institute of Metrology, China

Tin—Base Allots

Code As   Mass fraction (10 -2 ) Bi   Mass fraction (10 -2 ) Cu   Mass fraction (10 -2 )
Value Certified Uncertainty Value Certified Uncertainty Value Certified Uncertainty
GBW02301 0.018 0.001 0.014 0.001 4.06 0.01
GBW02302 0.020 0.001 0.012 0.001 6.72 0.04
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