Innovations in the speciation of organolead compounds in water: towards a more rational, rapid, and simple analytical process.
Speciation analysis calls for rapid, simple systems for minimizing errors made in the most troublesome of all steps in the analytical process: sample preparation. In this context, continuous-flow systems are of great help. The evolution in the different methodologies enabled solutions to the main shortcomings occurring from the lack of selectivity of using RP-C18 as sorbent material. One solution was a shift to more sensitive and selective, but only partially automated, systems employing C60 fullerene and Grignard's reagent; another was a shift to completely automated systems employing sodium tetrapropylborate; and a final solution was to employ the simplest possible configuration by removing the reagent stream. The analytical methods developed allowed the identification and quantification of different organolead species at the pg/ml levels in rainwater samples, with precision (RSD) of about 5% and recoveries ranging from 92 to 100%.
Baena
J R
JR
Analytical Chemistry Division, University of Córdoba, E-14071 Córdoba, Spain. qa2robaj@uco.es
Gallego
M
M
Valcárcel
M
M
D001331:Automation; D002623:Chemistry Techniques, Analytical / Q000295:instrumentation / Q000379:methods*; D005618:Fresh Water / Q000737:chemistry*; D037741:Fullerenes / Q000737:chemistry; D007854:Lead / Q000032:analysis* / Q000737:chemistry*; D009930:Organic Chemicals / Q000032:analysis* / Q000737:chemistry*; D011891:Rain; D012680:Sensitivity and Specificity; D013997:Time Factors
D037741:Fullerenes; D009930:Organic Chemicals; D007854:Lead