The synthesis of a new reagent 1-azobenzene-3-(5-nitro-2-pyridyl)-triazene(ABNPDT) and its colour reaction with cadimum were reported. At pH=10.40, in the presence of Triton X-100, ABNPDT react with cadimum to form a ...The synthesis of a new reagent 1-azobenzene-3-(5-nitro-2-pyridyl)-triazene(ABNPDT) and its colour reaction with cadimum were reported. At pH=10.40, in the presence of Triton X-100, ABNPDT react with cadimum to form a red Complex. The maximum absorption of reagent and complex are at 430nm and 520NM respectively. The molar absorpitivity is 2.0710 5L·mol -1 ·cm -1 . Berr’s law can be applied in the rang of 0～12μg/25ml. This method was used to determine tarce cadmium in water with satisfactory results.展开更多
In the presence of Triton X100,the color reaction of Mercury(Ⅱ)with 2hydroxy5nitrophenyldiazoaminoazobenene(HNPDAAB)was studied.Mercury(Ⅱ)reacts with HNPDAAB and forms a 1∶1 red complex at pH=95-110 buffer solution...In the presence of Triton X100,the color reaction of Mercury(Ⅱ)with 2hydroxy5nitrophenyldiazoaminoazobenene(HNPDAAB)was studied.Mercury(Ⅱ)reacts with HNPDAAB and forms a 1∶1 red complex at pH=95-110 buffer solution of Na2B4O7NaOH.The molar absorptivity is 256×105L·mol-1·cm-1.Beer’s law is obeyed in the concentration range of 0～12μg/25mL for Mercury(Ⅱ).The results are in agreement with those determined by the conventional method.This new method was used to determine trace mercury in wastewater.展开更多
以亚氨基二乙腈为起始原料,经过亚硝基化、环合、硝化三步反应得到2,6-二氨基-3,5-二硝基吡嗪-1-氧化物(LLM-105)。确定了硝化2,6-二氨基吡嗪-1-氧化物(DAPO)制备LLM-105的最佳工艺条件为:反应温度25℃,反应时间5h,用发烟硝酸或硝酸钾...以亚氨基二乙腈为起始原料,经过亚硝基化、环合、硝化三步反应得到2,6-二氨基-3,5-二硝基吡嗪-1-氧化物(LLM-105)。确定了硝化2,6-二氨基吡嗪-1-氧化物(DAPO)制备LLM-105的最佳工艺条件为:反应温度25℃,反应时间5h,用发烟硝酸或硝酸钾向发烟硫酸和2,6-二氨基吡嗪-1-氧化物混合物中加料的工艺路线,总产率为35%。用1 H NMR,IR,MS对DAPO和LLM-105的结构进行了表征,推测了DAPO环化反应历程。展开更多
文摘The synthesis of a new reagent 1-azobenzene-3-(5-nitro-2-pyridyl)-triazene(ABNPDT) and its colour reaction with cadimum were reported. At pH=10.40, in the presence of Triton X-100, ABNPDT react with cadimum to form a red Complex. The maximum absorption of reagent and complex are at 430nm and 520NM respectively. The molar absorpitivity is 2.0710 5L·mol -1 ·cm -1 . Berr’s law can be applied in the rang of 0～12μg/25ml. This method was used to determine tarce cadmium in water with satisfactory results.
文摘In the presence of Triton X100,the color reaction of Mercury(Ⅱ)with 2hydroxy5nitrophenyldiazoaminoazobenene(HNPDAAB)was studied.Mercury(Ⅱ)reacts with HNPDAAB and forms a 1∶1 red complex at pH=95-110 buffer solution of Na2B4O7NaOH.The molar absorptivity is 256×105L·mol-1·cm-1.Beer’s law is obeyed in the concentration range of 0～12μg/25mL for Mercury(Ⅱ).The results are in agreement with those determined by the conventional method.This new method was used to determine trace mercury in wastewater.
文摘以亚氨基二乙腈为起始原料,经过亚硝基化、环合、硝化三步反应得到2,6-二氨基-3,5-二硝基吡嗪-1-氧化物(LLM-105)。确定了硝化2,6-二氨基吡嗪-1-氧化物(DAPO)制备LLM-105的最佳工艺条件为:反应温度25℃,反应时间5h,用发烟硝酸或硝酸钾向发烟硫酸和2,6-二氨基吡嗪-1-氧化物混合物中加料的工艺路线,总产率为35%。用1 H NMR,IR,MS对DAPO和LLM-105的结构进行了表征,推测了DAPO环化反应历程。
