摘要
以2-巯基-6-氯苯并噁唑和固体光气为起始原料,DMF为催化剂,在甲苯溶液中合成2,6-二氯苯并噁唑,反应尾气用10%液碱吸收。分别用稀释法、絮凝沉淀法、蒸馏法对尾气吸收废水进行预处理,然后再用纳氏分光光度法检测水样的氨氮浓度。结果表明,絮凝沉淀法能有效屏蔽2,6-二氯苯并噁唑尾气吸收废水中硫化物对氨氮检测的干扰,氨氮检测快捷准确。
Using 2-mercapto-6-chlorobenzoxazole and triphosgene as starting materials, 2,6-dichlorobenzoxazole was synthesized in a toluene solution with DMF as a catalyst, the exhaust gas was absorbed with 10% NaOH solution. The water samples were pretreated by dilution method, flocculation precipitation method and distillation method, and then the ammonia nitrogen of the water samples was detected by Nessler’s reagent spectrophotometry. The results show that flocculation precipitation method could effectively block the interference of sulfides in the production of2,6-dichlorophenoxazole to the determination of ammonia nitrogen and make the detection data more accurate.
作者
王建忠
Wang Jian-zhong(Nantong Hisun Chemical Co., Ltd., Jiangsu Nantong 226400, China)
出处
《现代农药》
CAS
2019年第4期27-28,31,共3页
MODERN AGROCHEMICALS
关键词
2
6-二氯苯并噁唑
氨氮检测
纳氏分光光度法
硫化物
2,6-dichlorobenzoxazole
ammonia nitrogen detection
Nessler’s reagent spectrophotometry
sulphide
