【摘要】 目的 改进水中铝的测定方法。方法 采用铝-铬天青S-溴化十六烷基吡啶分光光度法。结果 改进后,铝含量在每25ml 0.0～6.0μg范围内,其标准系列线性良好,相关系数r=0.9994,回归方程y=1.031x+0.008,方法检出限为0.020mg/L。变异系数在4.90％以下,回收率范围在93 3％～1000％。结论 改进后的方法操作简便、快速,适合大批样品铝的测定。更多还原

【Abstract】 ve To improve the method of determination of aluminium in water. Methods The method of aluminium chrome azurol S-cetylpyridinium bromide spectrophotometry was used. Results The improved determi-nation of aluminium revealed perfect linear relationship in determining the standard aluminium solution series at the range of 0. 0-6.0μg/25 ml aluminium. The regression equation was calculated as y = 1. 031x + 0. 008(r=0.9994) . The detection limit was 0.02 mg/L aluminium. The coefficient variation was below 4.90% . The recovery rate ranged from 93.3% to 100.0% . Conclusion The improved method was rapid and easy to operate, suitable for determination of Al3+ in a large number of water samples.更多还原