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海水中的常見元素對過硫酸鉀消解海水中總氮測定(紫外分光光度法)的影響 摘要:本文選取海水中常見元素作為研究對象,考察它們對海水中總氮測定(紫外分光光度法)的影響情況,研究結果表明:1)所選取的常見元素中HCO3-、Br-、Fe3+、Cr6+對測定有影響;2)ρHCO3- 在0.142g/L~1g/L范圍內,HCO3-離子對海水中總氮測定的影響程度隨HCO3-離子濃度的增加先減小后增大;3)ρBr-在0.0674g/L~0.3g/L范圍內,Br-離子對海水中總氮測定的影響程度隨離子濃度的增加而減小;4)ρFe3+在0.5125g/L~2.05g/L范圍內,Fe3+離子對海水中總氮測定的影響程度隨離子濃度的增加先增大后減;5)ρCr6+在0.52g/L~2.08g/L范圍內,Cr6+離子對海水中總氮測定的影響程度隨Cr6+離子濃度的增加先減小后增大。實驗結果為消除海水中總氮測定的干擾因素提供了參考。 關鍵詞:常見元素;紫外分光光度法;過硫酸鉀消解;光譜掃描 急急急急急急。。。!翻譯加上題目跪謝!本科畢業(yè)論文用!急! |
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The Effect of Common Elements in Seawater to TN Test by Potassium Persulfate Digestion (UV Spectroscopy) Abstract: The researcher selected some common elements/ions in seawater, to evaluate the affect to TN testing by UV Spectroscopy. The results show that: 1)Among the common elements selected, HCO3-、Br-、Fe3+、Cr6+ affect TN testing. 2), the effect of HCO3- to testing increases fist, then decreases along with the increasing of concentration within the range of 0.142g/L to 1g/L. 3), the effect of ρBr- to TN testing decreases along with the increasing of its concentration within the range of 0.0674g/L~0.3g/L. 4), the effect of Fe3+ to TN testing increases fist, then decreases along with the increasing of concentration within the range of 0.5125g/L~2.05g/L. 5)the effect of Cr6+ to TN testing decreases fist, then increases along with the increasing of concentration within the range of 0.52g/L~2.08g/L. the research results aim to provide reference for interference elimination of seawater TN testing. Key words: common elements, UV, Potassium persulfate digestion, spectrum scanning |
鐵桿木蟲 (著名寫手)
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