On-line determination of Sb(III) and total Sb using baker's yeast immobilized on polyurethane foam and hydride generation inductively coupled plasma optical emission spectrometry

On-line redox speciation analysis of antimony using l-proline immobilized on controlled pore glass and hydride generation inductively coupled plasma optical emission spectrometry for detection

“…Recoveries data of Sb(III) and Sb(V) for synthetic, spiked and Standard Reference Material NIST-1640 river water samples are presented in Table 3. Recoveries of the analytes in synthetic and spiked water samples were comparable to those earlier reported for methods based on solid phase extraction ion chromatography [6]. In addition, the values found for Sb(III) and Sb(V) in the Standard Reference Material NIST-1640 river water were in good agreement with previously reported values (1.4 ± 0.2 for Sb(III) and 12.3 ± 0.3 [6]), which confirms the reliability of the proposed approach for redox speciation analysis of Sb.…”

“…Effective generation of SbH 3 requires a previous reduction of Sb(V) to Sb(III) [6]. The on-line reduction of Sb(V) to Sb(III) has been already performed successfully using thiourea as pre-reducer agent [6,12,13].…”

“…The on-line reduction of Sb(V) to Sb(III) has been already performed successfully using thiourea as pre-reducer agent [6,12,13]. Thus, aiming to assess optimal conditions to determine Sb(V), after its separation from the sample solution using the l-proline column, different sizes of reaction coil and thiourea concentrations were tested.…”

“…A significant amount of research has focused on the development of novel ion-exchange materials that can be combined with flow injection analysis (FIA) and atomic spectrometric detectors for preconcentration. Biological substrates such as yeasts have being successfully used with preconcentration and speciation purposes [3][4][5][6]. Peptides and aminoacids have also been immobilized onto controlled pore glass and in all instances, they were proven to be effective metal chelators [7,8].…”

“…Recoveries of Sb(III) and Sb(V) in mixed standard solution and spiked river water samplesMean ± S.D., n = 3. b Calculated considering the ratio (%): obtained values by reported values[6].…”