芳香烴之紫外光譜分析 第一報 苯之定量

Determination of Aromatics by Ultraviolet Spectrophotometry I. DeterminaHon of Benzene

林文喜(Wen-Shi Lin)

《化學》 56年1期 (1967/03) Pp. 31-33

https://doi.org/10.6623/chem.1967006

摘要

採用95%乙醇為溶劑，測定苯之紫外光吸收光譜。其結果與用異辛烷為溶劑的測定結果相同。在243.0, 248.5, 254.5及260.5mμ處，有明顯的尖峯。使用同一溶劑，測定苯在上述各波長的吸光係數，其結果顯示與Beer氏法則稍有偏差。由此等結果導出苯濃度之計算式，應用於合成試樣，結果平均誤差為0.6%。

並列摘要

The ultraviolet absorption spectra of benzene in 95% ethanol was determined. The result was the same as that reported by other workers in case of benzene in iso-octane. Peaks were found at wave lengths of 243.0, 248.5, 254.5 and 260.5mμ. By plotting the absorption coefficient versus absorbance a sloped line which showed some deviation from Beer's Law was obtained. From the absorption coefficient determined a formula relating the absorbance and the concentration of benzene was derived. The mean error of benzene concentration calculated with this formula was 0.6% when checked with the synthetic samples.