目的建立净水剂中砷原子吸收测定方法。方法样品经酸化加热处理,采用热解涂层石墨管和镍作基体改进剂,用原子吸收进行测定。结果方法检出限为5μg/L,RSD为1.5%,特征浓度为1.45μg/L,平均回收率为98.1%。结论利用原子吸收法,结合热解涂层石墨管和镍作基体改进剂,可准确测量净水剂中的痕量砷。 Objective To establish a method for determination of arsenic in water purifying agents. Methods The samples were acidified and heat treated. The samples were pyrolyzed with graphite tubes and nickel as the matrix modifier and determined by atomic absorption. Results The detection limit was 5μg / L, RSD was 1.5%, the characteristic concentration was 1.45μg / L, the average recovery was 98.1%. Conclusions Arsenic can be accurately measured by atomic absorption spectrometry combined with pyrolytic coated graphite tubes and nickel as a matrix modifier.