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2011•Chinese Journal of Health Laboratory TechnologyRequires access

To optimize the factors in determination of lead in urine by Graphite furnace atomic absorption spectrometry(GFAAS)

Chen Hui

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Abstract

Objective: To optimize the factors in determination of lead in urine by GFAA.Methods:The standard addition method with Graphite furnace atomic absorption spectrometry were used in this determination.Results: An optimal one was selected from the three matrix-modifiers with appropriate dosage and control the low absorbance of the blank tube.The detection limit was 1.13 μg/L.The graphite furnace heating condition was selected to optimize the ashing and atomization temperature.The curve coefficient was 0.9991.The recovery was 95.4%~102.3%,RSD was 3.27%.Conclusion:This method can get the low detection limit,which is sensitive,simple,rapid and reliable for detecting large amount of lead in urine.

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What this paper is about

Objective: To optimize the factors in determination of lead in urine by GFAA.Methods:The standard addition method with Graphite furnace atomic absorption spectrometry were used in this determination.Results: An optimal one was selected from the three matrix-modifiers with appropriate dosage and control the low absorbance of the blank tube.The detection limit was 1.13 μg/L.The graphite furnace heating condition was selected to optimize the ashing and atomization temperature.The curve coefficient was 0.9991.The recovery was 95.4%~102.3%,RSD was 3.27%.Conclusion:This method can get the low detection limit,which is sensitive,simple,rapid and reliable for detecting large amount of lead in urine.

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Available abstract

Objective: To optimize the factors in determination of lead in urine by GFAA.Methods:The standard addition method with Graphite furnace atomic absorption spectrometry were used in this determination.Results: An optimal one was selected from the three matrix-modifiers with appropriate dosage and control the low absorbance of the blank tube.The detection limit was 1.13 μg/L.The graphite furnace heating condition was selected to optimize the ashing and atomization temperature.The curve coefficient was 0.9991.The recovery was 95.4%~102.3%,RSD was 3.27%.Conclusion:This method can get the low detection limit,which is sensitive,simple,rapid and reliable for detecting large amount of lead in urine.

Key concepts: Graphite furnace atomic absorption, Ashing, Detection limit, Graphite, Absorbance, Chemistry, Matrix (chemical analysis), Mass spectrometry

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