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Merck
  • Development of a novel cyano group containing electrochemically deposited polymer film for ultrasensitive simultaneous detection of trace level cadmium and lead.

Development of a novel cyano group containing electrochemically deposited polymer film for ultrasensitive simultaneous detection of trace level cadmium and lead.

Journal of hazardous materials (2012-09-12)
M Francklin Philips, Anantha Iyengar Gopalan, Kwang-Pill Lee
要旨

Poly(diphenylamine-co-2-aminobenzonitrile) (P(DPA-co-2ABN)), a cyano group containing conducting polyaniline derivative, has been electrodeposited developed as the new material and utilized for the simultaneous electrochemical determination of trace levels of cadmium (Cd(2+)) and lead (Pb(2+)). P(DPA-co-2ABN) film preconcentrates effectively through cyano chelation and electrochemically strips the heavy metal ions with well separated potentials, which are beneficially utilized for ppb level simultaneous detection of Cd(2+) and Pb(2+). Differential pulse voltammetry studies revealed that Cd(2+) and Pb(2+) ions were simultaneously stripped with well-defined, separated and sharp peaks for Cd(2+) and Pb(2+). The influence of various operational parameters such as pulse amplitude, pulse time, scan rate, initial potential, end potential, accumulation potential and accumulation time on the electrochemical stripping of heavy metals were investigated in details. Under the optimal conditions, good linear correlations were obtained from 1.26 to 907.8 ppm for Cd(2+) and 0.26 to 58.73 ppm for Pb(2+), respectively. Low detection limits for Cd(2+) and Pb(2+), 0.255 ppm and 0.165 ppm, respectively, were observed. The practical utility of the new procedure was demonstrated in real samples.

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Sigma-Aldrich
ジフェニルアミン, ACS reagent, ≥99%
Sigma-Aldrich
ジフェニルアミン, ReagentPlus®, 99%
Supelco
ジフェニルアミン 溶液, certified reference material, 5000 μg/mL in methanol
Sigma-Aldrich
ジフェニルアミン, puriss. p.a., redox indicator, ACS reagent, reag. Ph. Eur., ≥98% (GC)
Supelco
ジフェニルアミン, PESTANAL®, analytical standard