摘要
Titanium nitride was recommended as pH-sensitive materials to fabricate pH sensors. The TiN electrode studied in this paper showed a linear response in the pH range of 11-14 with a response slope of -60 mV/pH. The correlation coefficient was 0.998. The response time of the electrode was about 1 min. It exhibits some advantages over the glass pH electrode in more rigid structure and better selectivity toward cations of alkali metals, effectively overcoming the interference of Na + in high pH solution. No interferences from commonly accompanying cations and anions were observed. The electrode also showed a high stability and a good reproducibility. The potential drift was less than 2 mV as measured in pH 13.5 and 14 solution for 2 h. When the electrode was alternately measured in the solution of pH 13.5 and 14 solution, the relative standard deviation estimated for six measurements were about 0.27% and 0.29%, respectively. In addition, the electrode was performed excellently in corrosion medium containing F -. The lifetime of the electrode was over 3 months.
Titanium nitride was recommended as pH-sensitive materials to fabricate pH sensors. The TiN electrode studied in this paper showed a linear response in the pH range of 11-14 with a response slope of -60 mV/pH. The correlation coefficient was 0.998. The response time of the electrode was about 1 min. It exhibits some advantages over the glass pH electrode in more rigid structure and better selectivity toward cations of alkali metals, effectively overcoming the interference of Na + in high pH solution. No interferences from commonly accompanying cations and anions were observed. The electrode also showed a high stability and a good reproducibility. The potential drift was less than 2 mV as measured in pH 13.5 and 14 solution for 2 h. When the electrode was alternately measured in the solution of pH 13.5 and 14 solution, the relative standard deviation estimated for six measurements were about 0.27% and 0.29%, respectively. In addition, the electrode was performed excellently in corrosion medium containing F -. The lifetime of the electrode was over 3 months.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第8期1400-1402,共3页
Chemical Journal of Chinese Universities
