The indirect voltammetric determination of trace sulfate (2.0×10^(-6)～4.0×10^(-5) mol/L ) with the adsorptive complex wave of lead(Ⅱ)-tetrakis (4-trimethylammonium phenyl) porphyrin (PbTTMAPP) is reported....The indirect voltammetric determination of trace sulfate (2.0×10^(-6)～4.0×10^(-5) mol/L ) with the adsorptive complex wave of lead(Ⅱ)-tetrakis (4-trimethylammonium phenyl) porphyrin (PbTTMAPP) is reported.This method has been used for the analysis of natural waters with satisfactory results.展开更多
A second derivative polarographic wave of naphthalene is observed in 50% N, N-dimethylformamide and ammonia-ammonium chloride medium. The peak potential is about ?1.05 V (vs. SCE). The concentration of naphthalene is ...A second derivative polarographic wave of naphthalene is observed in 50% N, N-dimethylformamide and ammonia-ammonium chloride medium. The peak potential is about ?1.05 V (vs. SCE). The concentration of naphthalene is linear with peak current in the range of 5.00×10?6 mol/L to 5.00×10?4 mol/L, The detection limit is 2.00×10?6 mol/L. This method can be used to determine naphthalene content of the sample such as coal, mothball and asphaltic bitumen. The relative standard deviation (RSD) are in the range of 0.38%≈1.30%. The determined recoveries by adding known amounts of naphthalene to sample solution are in the range of 92%≈101%. This paper also study on the polarographic behavior of naphthalene.展开更多
文摘The indirect voltammetric determination of trace sulfate (2.0×10^(-6)～4.0×10^(-5) mol/L ) with the adsorptive complex wave of lead(Ⅱ)-tetrakis (4-trimethylammonium phenyl) porphyrin (PbTTMAPP) is reported.This method has been used for the analysis of natural waters with satisfactory results.
文摘A second derivative polarographic wave of naphthalene is observed in 50% N, N-dimethylformamide and ammonia-ammonium chloride medium. The peak potential is about ?1.05 V (vs. SCE). The concentration of naphthalene is linear with peak current in the range of 5.00×10?6 mol/L to 5.00×10?4 mol/L, The detection limit is 2.00×10?6 mol/L. This method can be used to determine naphthalene content of the sample such as coal, mothball and asphaltic bitumen. The relative standard deviation (RSD) are in the range of 0.38%≈1.30%. The determined recoveries by adding known amounts of naphthalene to sample solution are in the range of 92%≈101%. This paper also study on the polarographic behavior of naphthalene.
