分光光度法测定工业废水中的汞
Spectrophotometric Determination of Mercurry in Industrial Sewage
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摘要: 在β-环糊精和聚乙烯醇存在下,在盐酸介质中基于汞-硫氰酸盐-罗丹明B的显色反应,采用分光光度法测定汞.配合物的最大吸收波长为580 nm,表观摩尔吸光系数为4.97×105L.mol-1.cm-1,汞含量在0.03~0.4 mg/L范围内服从比尔定律,线性回归方程:A=0.092ρ+0.007 1,相关系数r=0.998 4.此方法已用于工业废水中微量汞的测定,结果令人满意Abstract: The spetrophotometry analytical method of mercurry was developed based on the colour reaction of Hg(Ⅱ)-SCN——RhB system in the presence of β-cyclodextrin and polyvinyl alcohol in the medium of hydroloric acid.The maximum absorbance is at 580 nm with apparent molar absorption of 4.97 × 105 L·mol-1·cm-1.The beer’s law is obeyed in the range of 0.03~0.4 mg/L.The regression equation of calibration is A=0.092ρ + 0.007 1 with a correlation coefficient 0.988 4.The proposed method was used to determine t...
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Keywords:
- spectrophotometry /
- mercurry /
- β-cyclodextrin /
- polyvinyl alcohol /
- KSCN /
- Rhodamine B
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[1] 何翊,于宝钢. 基于非线性拟合原理的β-CD/1-MCP 包结物热分解反应动力学研究[J]. 信阳师范学院学报: 自然科学版, 2008,241-43. [2] 何翊,卢林刚,唐凯. β-CD/1-MCP 包结物在不同介质中释放的GC 研究[J]. 信阳师范学院学报: 自然科学版, 2007, 20( 3) : 300-302.
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