In situ propylation using sodium tetrapropylborate as a fast and simplified sample preparation for the speciation analysis of organolead compounds using GC-MIP-AES
M. Heisterkamp et Fc. Adams, In situ propylation using sodium tetrapropylborate as a fast and simplified sample preparation for the speciation analysis of organolead compounds using GC-MIP-AES, J ANAL ATOM, 14(9), 1999, pp. 1307-1311
A fast and simple sample preparation procedure for the speciation of organo
lead compounds is described. Separation and detection of the different spec
ies was carried out using gas chromatography hyphenated to microwave-induce
d plasma atomic emission spectrometry. Derivatization was performed using i
n situ propylation with sodium tetrapropylborate in an acetic acid-sodium a
cetate buffer medium of pH 4.5 with simultaneous extraction of the propylat
ed species into hexane. Detection limits (as Pb) ranging from 77 fg (0.15 n
g kg(-1)) to 102 fg (0.21 ng kg(-1)) and relative standard deviations betwe
en 4 and 6% were achieved. Accuracy of the procedure was confirmed by analy
sis of a certified reference material (CRM 605, Road Dust), where the desor
ption of the different species from the matrix by acid leaching was also in
tegrated in the derivatization and extraction step. The optimized sample pr
eparation procedure was applied to the analysis of alpine snow sampled at t
he Mont-Blanc in France.</abstract> <kwdgroup> </kwdgroup> </itemdata>