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2013•Zhiye yu jiankangRequires access

Determination of lead in urine by GFAAS with molybdenum-coated graphite tube

Rong Chen

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Abstract

[Objective]To establish a simple and fast and practical method for determination of urinary lead.[Methods]Urine was diluted by using mixed matrix modifier,then directly molybdenum-coated pyrolytic graphite tube graphite furnace atomic absorption spectrometry method(GFAAS) was adopted for the determination of lead content.[Results] The urinary lead content was linear in the range of 0-100 μg/L,and the correlation coefficient was 0.998.The relative standard deviation(RSD) was 0.314%-1.447%.The detection limit was 5 μg/L,recoveries were 98.07%-111.5%.[Conclusion]The method is simple and rapid,accurate and reliable,with safe environmental protection,and suitable for the determination of lead in urine.

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[Objective]To establish a simple and fast and practical method for determination of urinary lead.[Methods]Urine was diluted by using mixed matrix modifier,then directly molybdenum-coated pyrolytic graphite tube graphite furnace atomic absorption spectrometry method(GFAAS) was adopted for the determination of lead content.[Results] The urinary lead content was linear in the range of 0-100 μg/L,and the correlation coefficient was 0.998.The relative standard deviation(RSD) was 0.314%-1.447%.The detection limit was 5 μg/L,recoveries were 98.07%-111.5%.[Conclusion]The method is simple and rapid,accurate and reliable,with safe environmental protection,and suitable for the determination of lead in urine.

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Available abstract

[Objective]To establish a simple and fast and practical method for determination of urinary lead.[Methods]Urine was diluted by using mixed matrix modifier,then directly molybdenum-coated pyrolytic graphite tube graphite furnace atomic absorption spectrometry method(GFAAS) was adopted for the determination of lead content.[Results] The urinary lead content was linear in the range of 0-100 μg/L,and the correlation coefficient was 0.998.The relative standard deviation(RSD) was 0.314%-1.447%.The detection limit was 5 μg/L,recoveries were 98.07%-111.5%.[Conclusion]The method is simple and rapid,accurate and reliable,with safe environmental protection,and suitable for the determination of lead in urine.

Key concepts: Graphite furnace atomic absorption, Detection limit, Pyrolytic carbon, Graphite, Relative standard deviation, Urine, Chemistry, Chromatography

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