固绿分光光度法测定土壤中的痕量四溴双酚A

Determination of Trace Tetrabromobisphenol A in Soil by Fast Green Spectrophotometry

四溴双酚A对Fenton反应产生的羟基自由基氧化固绿FCF的反应具有抑制作用,建立了一种分光光度法测定土壤中痕量四溴双酚A的方法。探讨了硫酸用量、硫酸亚铁用量、固绿FCF用量、H_2O_2用量、温度以及时间等因素对体系的影响。结果表明,该方法操作简单、便于快速分析。在最佳实验条件下,方法的线性范围为2.67×10^(-6)~3.33×10^(-5)g/L,相关系数R为0.9992,检出限为1.6×10^(-7)g/L。方法应用于土壤中痕量四溴双酚A的测定时,测定结果的相对标准偏差为2.9%~4.1%,回收率为90.8%~109.4%。

Tetrabromobisphenol A can inhibit oxidative reaction of hydroxyl radical produced by Fenton reaction on discoloring fast green FCF. Based on the reaction with inhibition principle,a new spectrophotometric method for the determination of trace Tetrabromobisphenol A in soil was established. The effects of some factors such as dosage of sulfate acid,dosage of ferrous sulfate,dosage of fast green FCF,dosage of H_2O_2,temperature and time,on the system were investigated. The results indicated that the method has the advantages of simple operation and quick analysis. Under the optimum conditions,the linear range of tetrabromobisphenol A was from 2. 67 × 10-（-6）- 3. 33 × 10-（-5）g/L with the linearity relation coefficient R was 0. 999 2,and the detection of limit is1. 6 × 10-（-7）g/L. For the determination of trace level of tetrabromobisphenol A in soil,the relative standard deviation of the determination was from 2. 9% - 4. 1% and the recovery rate was from 90. 8% - 109. 4%.