摘要
用6种保存方法对不同浓度水样中3种氮盐(NH3-N、NO2-N、NO3-N)参数的稳定性进行了7 d的保存效果比较研究。结果认为:(1)NH3-N:以5‰氯仿4℃条件为最佳保存方法,保存时间宜控制在5 d内;(2)NO2-N:以5‰甲醛4℃为最佳保存方法,保存时间宜控制在7 d内;(3)NO3-N:以5‰氯仿4℃条件为最佳保存方法,保存时间宜控制在2 d内;(4)NO3-N的保存稳定性相对较差,受NH3-N初始浓度及降解速度影响较大。
Parameters of nitrogen （NH3-N、NO2-N、NO3-N）culture water in seven days were studied to establish a suitable one from six preservation methods. As the result, the preservation contributions were different. （1） NH3-N： the optimal condition was of 5‰ formaldehyde, four centigrade and the retention time controls suitably in five days; （2） NO2-N- the optimal condition was of 5‰ formaldehyde, four centigrade and the relention time controls suitably in seven days;（3）NO3-N： the optimal condition was of 5‰ formaldehyde, four centigrade and the retention time controls suitably in two days; （4） The preserved stability NO3-N was relatively bad, the effect was Bigger by initial density and degradation.
关键词
氯盐
浓度
保存
nitrogen density preservatio
