[1] GB2441-81．尿素总氮含量的测定方法(蒸馏法)

[2] GB3598-83．肥料中尿素态氮含量的测定(尿素酶法)

[3] GB2442-81．尿素总氮含量的测定(甲醛法)

[4] 薛华,李隆弟,郁源,等．分析化学．第2版．北京:清华大学出版社,1994

[5] 武汉大学．分析化学实验．第3版．北京:高等教育出版社,1995

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