Browsing by Autor "Chuanhua Wang"

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    Determination of chromium content in TSP by Flame-AAS
    (2007) Chuanhua Wang
    A method for the determination of chromium content in TSP is described,including the preparation of digested sample with mixed acid,adoption of Flame-AAS on the digested sample in acid medium,and determination of chromium content with adding calibration curve method.The method brings the correlation coefficient r = 0.9992,standard addition recovery of 96.40% ～ 101.30%.
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    Determination of mercury in phosphatic compound fertilizer by cold atomic absorption spectrometry
    (2008) Chuanhua Wang
    A method is described for determination of mercury in phosphatic compound fertilizer with the correlation coefficient r=0.9997,and within the range of marking recovery rate 98.75%～108.26%.The sample is dissolved with mixed acid,and its mercury content is determined in the acid media by cold atomic absorption spectrometry.
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    Determination of trace lead in feed-grade dicalcium phosphate by hydride generation atomic absorption spectrometry
    (2009) Chuanhua Wang
    A method is described for determination of trace lead in feed-grade dicalcium phosphate with the correlation coefficient r = 0.9987,and within the range of marking average recovery rate 98.45% ～ 100.75%. The sample is dissolved with hydrochloric acid solution,and its lead content is determined in a reaction system of HCl-K3Fe(CN)6-NaBH4 by hydride generation atomic absorption spectrometry.