摘要
在酸性介质中 ,草甘膦与过量的NO- 2 反应生成稳定的N 亚硝胺 ,而剩余的NO- 2 快速氧化亚铁氰化钾为铁氰化钾 ,与鲁米诺 铁氰化钾化学发光反应相偶合。据此 ,建立了反相流动注射化学发光法测定草甘膦的新方法。该方法的线性范围为 0 .10～ 5 .0 0mg·L- 1,检出限为 0 0 5mg·L- 1,相对标准偏差为 0 .6%。该方法用于废水中草甘膦的测定 ,回收率为 96%～ 10 6%
It is found that glyphosate reacts with excess amounts of NO - 2 in an acidic medium to form a stable nitroso compound. The unreacted NO - 2 will oxidize K 4Fe(CN) 6 to K 3Fe(CN) 6, which reacts further with luminol in aqueous alkali solution to give a characteristic blue luminescence. Based on this phenomenon, a new reversed flow injection chemiluminescence method for the determination of glyphosate is established. The linear range of the method is 0.10～5.00mg·L -1 . The detection limit is 0.05mg·L -1 . RSD is 0.6%. The method has been applied to the determination of glyphosate in waste water with recovery between 96%～106%.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2001年第7期289-290,293,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
