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目前 ,各化肥厂均采用二乙酰单肟法对尿素水解系统中微量尿素进行测定[1] 。虽然该方法检测限低 ,但操作烦琐 ,热稳定性差 ,精密度和准确度不够理想。本文测定方法选用对二甲氨基苯甲醛作为显色剂 ,在酸性溶液中 ,尿素与对二甲氨基苯甲醛反应 ,生成柠檬黄色化合物 ,其吸光度与?
At present, all fertilizer plants are using diacetyl mono-oxime method for the determination of trace urea in urea hydrolysis system [1]. Although this method detection limit is low, but cumbersome operation, poor thermal stability, precision and accuracy less than ideal. Determination of the method used in this paper p-dimethylaminobenzaldehyde as a developer, in acidic solution, urea and p-dimethylaminobenzaldehyde reaction to generate lemon yellow compound, the absorbance and?