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
测定痕量铊较常用的方法,是萃取碱性染料与[TlCl<sub>4</sub>]<sup>-</sup>或[TlBr<sub>4</sub>]<sup>的</sup>离子缔合物法,以罗丹明 B 和亮绿萃取法灵敏度较高。近年来,镉试剂和新...测定痕量铊较常用的方法,是萃取碱性染料与[TlCl<sub>4</sub>]<sup>-</sup>或[TlBr<sub>4</sub>]<sup>的</sup>离子缔合物法,以罗丹明 B 和亮绿萃取法灵敏度较高。近年来,镉试剂和新镉试剂已成功地用于痕量铊的测定。我们新近合成的镉试剂衍生物,4,4′—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 buf...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
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.
文摘测定痕量铊较常用的方法,是萃取碱性染料与[TlCl<sub>4</sub>]<sup>-</sup>或[TlBr<sub>4</sub>]<sup>的</sup>离子缔合物法,以罗丹明 B 和亮绿萃取法灵敏度较高。近年来,镉试剂和新镉试剂已成功地用于痕量铊的测定。我们新近合成的镉试剂衍生物,4,4′—
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.