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目的:建立测定痕量苯酚的新方法。方法:基于硫酸介质中,苯酚能催化溴酸钾氧化茜素红的褪色反应,建立了催化分光光度法测定痕量苯酚的新方法。结果:方法的线性范围为0.08~1.20μg/m l,检出限0.046μg/m l。RSD为1.92%、2.24%,样品加标回收率为97.5%~104.0%。结论:该方法简便快速,常见物质干扰小,用于环境水样痕量苯酚的测定,结果满意。
Objective: To establish a new method for the determination of trace phenol. Methods: A new method of catalytic spectrophotometric determination of trace phenol was established based on the reaction of phenol with potassium bromate in the oxidation of alizarin red. Results: The linear range of the method was 0.08 ~ 1.20μg / ml with the detection limit of 0.046μg / ml. RSD was 1.92% and 2.24% respectively. The spiked recoveries were 97.5% -104.0%. Conclusion: The method is simple, rapid, and has less interference with common substances. It is suitable for the determination of phenol in environmental water samples with satisfactory results.