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甲基紫分光光度法测定痕量钒 |
A Spectrophotometric Method for the Determination of Trace Vanadium Based on the Vanadium-Methyl Violet Reaction |
投稿时间:1999-12-01 修订日期:2000-02-23 |
DOI: |
中文关键词: 甲基紫 钒 分光光度法 |
英文关键词:methyl violet vanadium spectrophotometric method |
基金项目:福建省科委三项科技费用资助 |
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中文摘要: |
在碱性条件下,甲基紫(MV)与钒(Ⅴ)反应形成紫色缔合物,吸收峰位于580nm,缔合物组成摩尔比为V(Ⅴ):MV=1:3,表观摩尔吸光系数ε580=2.5×107L/(mol·cm),钒(Ⅴ)浓度在0~6.4μg/L范围内遵守比耳定律.方法操作简便,用于水、粮食和矿物样品中痕量钒(Ⅴ)的测定,结果令人满意. |
英文摘要: |
Vanadium reacts with methyl violet in the presence of NH3 to form a violet a complex. The ion association complex exhibits maximum absorption at 580 nm with an apparent molar absorptivity of 2.5×107 L/(mol·cm). The molar ratio of the components of V(Ⅴ):MV=1:3. Beer's law is obeyed in the range of 0~6.4 μg/L for vanadium. It has been applied easily for the determination of V(Ⅴ) in water, flour, rice and mineral samples with satisfactory results. |
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