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
Using n butyl nitrite as diazotiation reagent,4,4′-Dinitrodiazoaminobenzene(DNAAB) was synthesized.The colour reaction of DNAAB with Cd(Ⅱ) was studied.At pH 11.7,in the presence of Triton X-100,DNAAB with Cd(Ⅱ) for...Using n butyl nitrite as diazotiation reagent,4,4′-Dinitrodiazoaminobenzene(DNAAB) was synthesized.The colour reaction of DNAAB with Cd(Ⅱ) was studied.At pH 11.7,in the presence of Triton X-100,DNAAB with Cd(Ⅱ) forms a yellow complex(1∶3).The molar absorptivity is 2.52×10 5L·mol -1 ·cm -1 adhering Beer’s law in the rang of 0-12μg/25mL.This method was used to determine trace Cd(Ⅱ) in human hair with satisfactory results.展开更多
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Using n butyl nitrite as diazotiation reagent,4,4′-Dinitrodiazoaminobenzene(DNAAB) was synthesized.The colour reaction of DNAAB with Cd(Ⅱ) was studied.At pH 11.7,in the presence of Triton X-100,DNAAB with Cd(Ⅱ) forms a yellow complex(1∶3).The molar absorptivity is 2.52×10 5L·mol -1 ·cm -1 adhering Beer’s law in the rang of 0-12μg/25mL.This method was used to determine trace Cd(Ⅱ) in human hair with satisfactory results.
