新型自动比色法测定饮用水中的铝
Rapid Auto-colorimetric Method for Detecting Aluminum in Drinking Water
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摘要:目的 建立一种新型快速测定饮用水中铝的自动比色法, 并评价其效果。方法 在国家标准方法基础上, 优化试剂剂型, 简化操作步骤, 对方法测量范围、精密度、准确度以及实际样品测定进行实验研究。结果 方法线性范围为0.008~0.20 mg/L, 相关系数(r)为0.9995, 检出限为0.006 mg/L, RSD为0.42%~2.60%, 自来水加标回收率为87.5%~102%, 对铝质控样品的测定结果均在标准定值范围内, 相对误差为0.46%~4.15%。采用本法测定饮用水中铝结果与国家标准方法结果基本一致。结论 新型自动比色法测定饮用水中铝, 快速、准确、精密度高, 操作人员无需自行配制试剂, 测试所需试剂和样品用量少, 节约环保, 适合在村镇集中式供水单位普及应用。Abstract:Objective To establish and evaluate a rapid auto-colorimetric method for detecting aluminum in drinking water.Methods Based on the national standard method for aluminum detection, a methed is established by improving the form of reagents, simplifying the process of operation; investigating the measurable range, precision and accuracy; and detecting samples.Results The standard curve was linear in the range of 0.008~0.20 mg/L; the correlation coefficient was 0.9995; the detection limit of the method was 0.006 mg/L; RSD was 0.42%~2.60%; the recovery was 87.5%~102% in detecting aluminum in tap water. The results of aluminum in quality control samples were in the range of standard setting values and the relative error were 0.46%~4.15%. The results of samples detected by this method were consistent with those detected by the national standard method.Conclusions The new auto-colorimetric method for detecting aluminum in drinking water was fast, accurate and with high precision. The reagent used in this method was not necessary to be prepared by operators personally and a small amount of reagent and sample was required in each detection. So it is a method of saving and protecting environment, and is suitable for using in the laboratory of centralized water unit in villages and towns for water quality control.
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