光催化降解过程中苯酚的分光光度法测定

Spectrophotometric determination of phenol in the process of photocatalytic degradation of phenol aqueous solution with nano titania

提出了用双波长紫外分光光度法测定含对苯醌和苯酚混合液中苯酚的方法,解决了用分光光度法直接测定苯酚时对苯醌分析的干扰.选择测定波长为270和292 nm.用于纳米二氧化钛光催化降解苯酚过程中苯酚的测定.标准样品的加标回收率为:99.79%～101.17%,相对标准偏差小于0.50%;样品测定的加标回收率为:99.14%～104.75%,相对标准偏差小于2.20%,苯酚的检出限为0.10 mg/L.

The double-wavelength ultraviolet spectrophotometry was used to analyze the phenol in a mixed solution containing benzoquinone and phenol. The method is fast and simple. The determination wavelengths are selected as 270 and 292 nm. It was used for practical analysis in the process of photocatalytic degradation of phenol aqueous solution by nano titania with satisfactory results. The recoveries of the standard samples were 99.79% - 101.17%, and the relative standard deviation was less than 0.50%. The recoveries of added standard for the samples were 99. 14% - 104.75%, and the relative standard deviation was less than 2.20%. The detection limit of phenol was 0.10 mg/L.