摘要
提出了用氨气敏电极测定环境水样中凯氏氮的方法.PH12.0～13.0溶液中,NH4+在1.0×10-5-1.0×10-1mol·L-1范围内与电位呈良好线性关系,检出限为5×10-6mol·L-1,测定了生活污水、地表水中凯氏氮,回收率95～98％,相对标准偏差小于2.6％,测定结果与凯氏法一致.
A method for the ammonia electrode determination of Kjeldahl nitrogen in water is proposed. The charge of potential with the 1gC (NH4+) in solution of pH 12.0 - 13.0 is linear in the range of 1.0×10-5~ 1.0×10-1mol·L-1, and the detection limit is 5×10-6mol·L-1. The recovery is in 95-98% and the RSD less than 2.6 %. Results are in agreement with that of the Kjeldahl's method.
出处
《江汉大学学报（社会科学版）》
2002年第3期31-32,共2页
Journal of Jianghan University(Social Science Edition)
