Stationäre Phasen

Differential pulse voltammetric indirect determination of aluminium in drinking waters, blood, urine, hair, and medicament samples using l-dopa under alkaline conditions

“…Place 50 ml of sample solution in the electrolytic cell and record the anodic peak current of L-dopa (I p dopa ) after applying the DPV mode. Clean the electrode surface by making a reverse linear voltammetric scan (100 mV s 21 ) and stir the solution for 6 min with a magnetic stirrer. After adding Al III and stirring the solution for 8 min, apply the DPV mode and record the relative current response (I p Al,add ) again.…”

“…20 The detected amount of aluminium in hair is 33.2 ± 1.1 ppm, which is in good agreement with that [31.0 ± 7.5 ppm (s average and for six samples calculated from ref. 21)] detected by single sweep polarography with the adsorptive Al-Beryllon III complex wave. 21 The result for the blood sample is close to those obtained by Maurizio et al using atomic absorption spectrometry (serum aluminium in healthy subjects ranges from 2.0 to 36.0 mg l 21 , mean 17.3 ± 6.1 mg l 21 ) 22 and Suzuki et al using spectrofluorimetry (serum aluminium in healthy subjects ranges from 3.8 to 13.2 mg l 21 , mean 6.8 ± 2.8 mg l 21 ).…”

“…21)] detected by single sweep polarography with the adsorptive Al-Beryllon III complex wave. 21 The result for the blood sample is close to those obtained by Maurizio et al using atomic absorption spectrometry (serum aluminium in healthy subjects ranges from 2.0 to 36.0 mg l 21 , mean 17.3 ± 6.1 mg l 21 ) 22 and Suzuki et al using spectrofluorimetry (serum aluminium in healthy subjects ranges from 3.8 to 13.2 mg l 21 , mean 6.8 ± 2.8 mg l 21 ). 23 The excellent recoveries and better precision achieved indicate that the present method is reliable for determining aluminium in biological samples.…”