Fj. Krug et al., DETERMINATION OF LEAD IN BLOOD BY TUNGSTEN COIL ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY, Spectrochimica acta, Part B: Atomic spectroscopy, 50(12), 1995, pp. 1469-1474
A method for the determination of lead in blood using a tungsten coil
atomizer is described. A 100 mu l volume of the whole blood sample is
transferred to a sampler cup containing 100 mu l of water plus 300 mu
l of 0.25% v/v Triton X-100. After lysis of blood cells, 500 mu l of 1
0% w/v trichloroacetic acid is added for protein precipitation and 10
mu l of the supernatant solution is automatically delivered into the t
ungsten coil, The furnace heating program is implemented in 41 s. It i
s shown by the paired t-test that there is no significant difference a
t the 5% probability level between results obtained by the proposed me
thod and by using a transversely heated graphite atomizer with a longi
tudinal Zeeman background correction. Accuracy is also assessed by emp
loying reference materials. The proposed tungsten coil procedure prese
nts a characteristic mass of 15 pg Pb and a detection limit of 1.9 mu
g Pb dl(-1).