【摘要】 在一定的浓度范围内,利用紫外分光光度法可快速准确地同时测定模拟蒽油中蒽、咔唑、芴和苊的含量。用二氯甲烷作溶剂,在220～400 nm范围内分别对蒽、咔唑、芴和苊的不同浓度标准溶液进行光谱扫描,选择359、292、266、230 nm 4个波长分别作为它们各自的测定波长。结果表明,蒽、咔唑、芴和苊分别在0～10×10^-6、0～8×10^-6、0～12×10^-6、0～5×10^-6范围内,浓度和吸光度呈现良好的线性关系,能较好地符合朗伯比耳定律。为了验证该法的可行性和准确性,对上述4种物质分别进行加标回收实验,蒽、咔唑、芴和苊的相对误差分别为1.7%～4.8%、0.133%～1.9%、0.7%～7.4%、2.967%～9.7%;回收率分别为95.2%～98.3%、98.1%～99.867%、92.6%～104.33%、102.967%～109.7%。更多还原

【Abstract】 The contents of anthracene,carbazole,fluorene and acenaphthene in the simulated anthracene oil within a certain concentration range can be rapidly and accurately determined simultaneously by ultraviolet spectrophotometry.Using dichloromethane as solvent,the standard solutions of anthracene,carbazole,fluorene and acenaphthene under different concentrations are respectively scanned in the 220-400 nm range.According to the UV absorption spectra of four components,the wavelengths of 359 nm,292 nm,266 nm and 230 nm are selected as their respective determination wavelengths.It is shown there is a good linear relationship between the concentration and absorbance of anthracene,carbazole,fluorene and acenaphthene in the range of 0-10× 10^-6,0-8×10^-6,0-12×10^-6 and 0-5× 10^-6,respectively,which can better comply with Lambert Beer’s law.In order to verify the feasibility and accuracy of the method,these four substances are subjected to standard addition and recovery experiments. The relative errors of anthracene,carbazole,fluorene and acenaphthene are 1. 7%-4. 8%,0. 133%-1. 9%,0. 7%-7. 4% and 2. 967%-9. 7%; the recovery rates are95. 2%-98. 3%,98. 1%-99. 867%,92. 6%-104. 33% and 102. 967%-109. 7%,respectively.更多还原