【摘要】 用纳氏试剂比色法测污水中氨氮含量,为了消除干扰物质对测定的影响,需根据水体受污染程度,对水样通过絮凝沉淀法或蒸馏法进行预处理。本文通过试验论证了即使对较清洁的水,也以蒸馏法预处理为佳,蒸馏法预处理后的测定值更接近真值。更多还原

【Abstract】 In the determination of ammonia nitrogen, in order to get rid of the disturbances, pretreatments should be done on the water samples through flocculation setting or distillation based on the degree of polluted waters. This article demonstrates that even for comparably clean water, it is good to do the determination through distillation pretreatment. The test value obtained through distillation pretreatment better approaches the true value.更多还原