Sensitive determination of urinary vanadium by solvent extraction and atomic absorption spectroscopy
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- [Show abstract] [Hide abstract] ABSTRACT: Workers involved in the cleaning of boilers burning furnace fuel oil were monitored for exposure to vanadium. Urine samples, collected during the cleaning task, were analysed for vanadium by Electrothermal Atomic Absorption Spectrometry following chelation and solvent extraction. In all cases, urinary vanadium levels rose significantly throughout the period of boiler cleaning and showed good correlation with airborne vanadium levels to which the workers were exposed. The results indicate that ocupational exposure to vanadium can be monitored by regular analysis of urine samples throughout the exposure period.0Comments 8Citations
- [Show abstract] [Hide abstract] ABSTRACT: A solvent extraction electrothermal atomisation atomic absoprtion spectrometric method for determining vanadium in urine by pre-heating the graphite tubes (at 150 °C) before sample injection is described. A ten-fold increase in sensitivity was achieved together with an improvement in analytical accuracy (i.e., precision, linearity and repeatability). The values for urinary vanadium (mean value, 0.29 μg l-1; standard deviation, 0.17 μg l-1) measured for a non-occupationally exposed group (38 males, aged 41.4 ± 15.1 years) are in good agreement with the results obtained in other studies. The physico-chemical mechanism is discussed and the necessity for further studies to be undertaken on the determination of vanadium in serum and on the determination of other metals of toxicological interest is stressed.0Comments 18Citations
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