H. Beissler et al., Blank problems in the detection of gold by electrothermal atomisation and laser-induced fluorescence, SPECT ACT B, 54(14), 1999, pp. 2115-2120
The limit of detection of gold by electrothermal atomisation and double-res
onance laser-induced atomic fluorescence can reach the low femtogram level
as absolute amount of gold deposited in the furnace. At these high sensitiv
ities, even dry firings of the graphite tube may result in a signal, which
is unequivocally attributed to atomic fluorescence of the gold content of t
he tube released during atomisation. The occurrence and the analytical rele
vance of such blank signals are presented and discussed in this note. (C) 1
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