1. Non-extractive spectrophotometric determination of cobalt in real, environmental, biological and soil samples using diphenylthiocarbazone;Ahmed;Chem. Env. Res.,1998
2. American Public Health Associaltion, 1989. In: Clesceri, L.S., Greenberg, A.E., Trussell, R.R., Ranson, M.A.H. (Eds.), Standard Methods for the Examination of Water and Wastewater, 17th ed., Washington, DC, (i) 1–30, (ii) 3–94.
3. CRC Handbook of Organic Analytical Reagents;Anon.,1982
4. Study on the mechanism and applications of the fluorescence reactions among Cobalt(II) and two new derivatives of 8-sulfonamideoquinoline;Cao;Talanta,2000
5. Environmental Protection Agency (EPA), 1981. Second annual report on carcinogens. NTP 18–43, pp. 73–80.