Unit Code 300098:
Lead, Blood
Method Description
Lead in blood is determined by graphite furnace atomic
absorption spectrometry. Samples are prediluted with a matrix
modifier solution. The sample is then deposited in a depression
on a carbon rod in an unclosed chamber. The furnace is
electrically heated to a temperature sufficient to vaporize the lead
in the sample. Light emitted from a hollow cathode lamp at 283.3 nm
is absorbed by the vaporized atoms in the ground state. The
concentration of lead in a sample is determined by comparing its
measured emission signal with those obtained from a blank and
calibration standards. Quantitative measurement is based on
Beer's Law. (Parsons PJ, Slavin W: A Rapid Zeeman Graphite
Furnace Atomic Absorption Spectrometric Method for Determination
of Lead in Blood. Spectorchimica Acta 1993; 48B [6/7] pp 925-939)
Performing Laboratory Location
New England
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