摘要
绕丹宁与水在有机溶剂中发生诱导荷移反应，产生吸收光谱移动且吸收峰增大。基于此，优化了实验条件，建立了一种快速、简便、灵敏的测定有机溶剂中微量水分的新方法。甲醇、醋酸溶剂中的水分含量分别在3％-10％（φ）、0～4％（φ）范围及乙醇、1-丙醇、丙酮、乙酸乙酯溶剂中水分含量在0～5％（φ）范围内与吸光度（A）呈线性关系。其相关系数分别是0．9992、0．9996、0．9992、0．9982、0．9990和0．9995。使用本方法测定了灯用酒精中水分含量，结果令人满意。
A rapid, simple and sensitive spectrophotometric method is presented for the determination of trace water in various organic solvents. It is based on the fact that the organic solvent containing water would react with DMABR via the charge transfer reaction causing the absorbance spectra red-shifted. The larger the quantity of the water in the organic solvent, the higher the absorbance. The factors affecting the determination of water were studied. The linear ranges for the determination of water in methanol and acetic acid are 3% - 10% and 0 -4% , respectively, and those in ethanol, 1-propanol, acetone, acetic ether are 0 - 5% , respectively. Their respective correlation coefficients are 0. 999 2, 0. 999 6, 0. 999 2, 0. 998 2, 0. 999 0, and 0. 999 5. The method has been applied to the determination of water in 95% ethanol with satisfactory results.
出处
《分析测试学报》
CAS
CSCD
北大核心
2006年第2期117-119,共3页
Journal of Instrumental Analysis
基金
山西省高等学校科技研究开发基金资助(2004-14)
