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
The color reaction of Cadmium(Ⅱ) with 3,3′,5,5′-TBDP B DAA has been studied.The results show that in Na 2B 4O 7 NaOH buffer medium of pH10～11 and in the presence of Tween 80,Cadmium(Ⅱ) reacts with 3,3′,5,5′-TBD...The color reaction of Cadmium(Ⅱ) with 3,3′,5,5′-TBDP B DAA has been studied.The results show that in Na 2B 4O 7 NaOH buffer medium of pH10～11 and in the presence of Tween 80,Cadmium(Ⅱ) reacts with 3,3′,5,5′-TBDP B DAA to form a purplish red complex with molar ratio of 1∶2.The complex exhibits maximum absorption at 520nm with a molar absorptivity of 1.98×10 5L·mol -1 ·cm -1 .Beer’s law can be applicable in the range of 0～25μg/25ml Cd(Ⅱ).The method has been applied to the determination of micro amounts of Cadmium(Ⅱ) in vegetable,rice and other biological samples 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The color reaction of Cadmium(Ⅱ) with 3,3′,5,5′-TBDP B DAA has been studied.The results show that in Na 2B 4O 7 NaOH buffer medium of pH10～11 and in the presence of Tween 80,Cadmium(Ⅱ) reacts with 3,3′,5,5′-TBDP B DAA to form a purplish red complex with molar ratio of 1∶2.The complex exhibits maximum absorption at 520nm with a molar absorptivity of 1.98×10 5L·mol -1 ·cm -1 .Beer’s law can be applicable in the range of 0～25μg/25ml Cd(Ⅱ).The method has been applied to the determination of micro amounts of Cadmium(Ⅱ) in vegetable,rice and other biological samples with satisfactory results.
