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Progress in Chemistry 2007, Vol. 19 Issue (01): 1-5   Next Articles

• Invited Article •

Professor Chang Tsinglien and His Study on Determination of New Values of Atomic Weight

Professor Chang Tsinglien(Zhang Qinglian),an academician of Chinese Academy of Sciences,born in 1908,is the founder of isotopic chemistry in China.This paper introduces his outstanding contributions to the determination on new values of atomic weight when he was 90 years old.From the beginning of 1990s,he led a research group for a long term project to determine the new values of atomic weight by using mass spectrum technique.The new international standards of atomic weight of 9 elements determined by Chang’s group including In,Ir,Sb,Eu,(Ce,Er,Ge,Dy) and Zn had been set up by CAWIA of IUPAC till July 2001,and that of another element Sm was set up in 2005.    

  1. College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China
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Professor Chang Tsinglien(Zhang Qinglian),an academician of Chinese Academy of Sciences,born in 1908,is the founder of isotopic chemistry in China.This paper introduces his outstanding contributions to the determination on new values of atomic weight when he was 90 years old.From the beginning of 1990s,he led a research group for a long term project to determine the new values of atomic weight by using mass spectrum technique.The new international standards of atomic weight of 9 elements determined by Chang’s group including In,Ir,Sb,Eu,(Ce,Er,Ge,Dy) and Zn had been set up by CAWIA of IUPAC till July 2001,and that of another element Sm was set up in 2005. 

Key words: Chang Tsinglien, new values of atomic weight, determination
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