ONLINE PRECONCENTRATION AND DETERMINATION OF MERCURY IN BIOLOGICAL SAMPLES BY FLOW-INJECTION VAPOR GENERATION INDUCTIVELY-COUPLED PLASMA-ATOMIC EMISSION-SPECTROMETRY
Pc. Rudner et al., ONLINE PRECONCENTRATION AND DETERMINATION OF MERCURY IN BIOLOGICAL SAMPLES BY FLOW-INJECTION VAPOR GENERATION INDUCTIVELY-COUPLED PLASMA-ATOMIC EMISSION-SPECTROMETRY, Fresenius' journal of analytical chemistry, 352(6), 1995, pp. 615-617
An FI-ICP-AES method for the determination of trace levels of mercury
in biological samples has been described, which is based on the extrac
tion of the mercury complex with 1,5-bis (di-2-pyridyl)methylene thioc
arbonohydrazide (DPTH) on-line into isobuthyl-methyl ketone (IBMK). Th
e organic phase (containing the complex) has been mixed on-line with S
nCl2 in N,N-dimethylformamide. Thus, mercury vapour can be generated d
irectly from the organic phase and separated in a gas-liquid separatio
n device. The detection limit for mercury is 4 ng/ml and the calibrati
on curve is linear at least from 10 to 2500 ng/ml. The relative standa
rd deviation for 10 replicate measurements is +/- 1% for 100 ng/ml of
Hg(II). Re suits from the analysis of some certified biological refere
nce materials are given.