Spectrophotometric Determination of Trace Water in Wheat Flour

    Feng Xilan

    2

    , Li Na

    1

    , Zhao Fenglin

    3 1

    , Tian Mengkui

    2

    , Li Kean

    1

    1

    ( Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education ,Department of Chemistry , Peking University , Beijing 100871)

    2

    ( Henan Vocation2Technical Teachers College , Xinxiang 453003)

    Abstract The charge2transfer (CT) reaction between chloranilic acid and water in alcohol was studied by

    spectrophotometric method and the condition of reaction was determined. The product of reaction has maximum

    absorption at 530 nm. Beer′ s law was conformed in the range of 0 %～8. 0 %( VP V) in methanol and 0 %～6. 0 %

    ( VP V) in other alcohols. The limit of determination is 0. 13 %( VP V) with the relative standard deviation less than ......