2010•Chinese Journal of Health Laboratory TechnologyRequires access

Measurement of lead by graphite furnace atomic absorption spectrometry in urine

Kang Zheng-li

Abstract

Objective:To explore the measurement of lead with direct dilution-graphite furnace atomic absorption spectrometry in urine.Methods:The urine was acidified by nitric acid and was diluted with matrix modifier [0.2% Tritonx-100],then the samples were automatically introduced and the lead in the urine was measured with deuterium lamp graphite furnace atomic absorption spectrometer.Rusuits:There was significant linear between absorbance and graphite lead level which was 0 μg/L～50 μg/L(r=0.9996).And the range of the relative standard deviation(RSD) was 4.0%～10.0%,the range of recovery rate was 93%～98% and detection limit was 1.2 μg/L.Conclusion:The measurement is characterized by good degree of accuracy and precision and no need for chemical treatment as lower pollution.

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Key concepts: Graphite furnace atomic absorption, Graphite, Absorbance, Detection limit, Atomic absorption spectroscopy, Chemistry, Nitric acid, Analytical Chemistry (journal)