卢其明 廖宗文. 紫外分光光度法测定蔬菜硝态氮的改进[J]. 华南农业大学学报, 1997, (4): 104-106.
    引用本文: 卢其明 廖宗文. 紫外分光光度法测定蔬菜硝态氮的改进[J]. 华南农业大学学报, 1997, (4): 104-106.
    IMPROVEMENT OF DETERMINATION OF NITRATE NITROGEN IN VEGETABLE WITH UV-SPECTROPHOTOMETRY[J]. Journal of South China Agricultural University, 1997, (4): 104-106.
    Citation: IMPROVEMENT OF DETERMINATION OF NITRATE NITROGEN IN VEGETABLE WITH UV-SPECTROPHOTOMETRY[J]. Journal of South China Agricultural University, 1997, (4): 104-106.

    紫外分光光度法测定蔬菜硝态氮的改进

    IMPROVEMENT OF DETERMINATION OF NITRATE NITROGEN IN VEGETABLE WITH UV-SPECTROPHOTOMETRY

    • 摘要: 将蔬菜样品制成浆液后,用Na2CO4-NaHCO3缓冲溶液及活性炭处理,再次处理液用H2SO4酸化,用双波长紫外分光光度法测定NO^-3-N。按指定试验条件,样品加标回收率为95.6%-103.0%,与镉柱法比较无显著差异。

       

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