PAN-6S作络合指示剂连续滴定测定汞和铅的研究

Simultaneous titration determination of mercury and lead with 1-(2-pyridylazo)-2-naphthol-6-sulphonic acid as a complexometric indicator

试验研究了pH3.0和pH5.4的介质中,以1 (2 吡啶偶氮) 2 萘酚 6 磺酸(PAN 6S)作为指示剂,以EDTA为滴定剂连续滴定汞和铅,其终点颜色变化敏锐,准确度高。

A method for simultaneous titration determination of mercury and lead was studied in the medium of pH 3.0 and pH 5.4. The end points for both mercury and lead were sharp with 1-(2-pyridylazo)-2-naphthol-6-sulphonic acid as an indicator and EDTA as a titrant. The amounts of mercury and lead did not interfere each other in the appropriate concentration range. The method was used for the simultaneous determination of mercury and lead in alloys samples with satisfactory results.