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2014•Unpublished venueRequires access

Microwave digestion-graphite furnace atomic absorption spectrometry

Zhang Guan

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Abstract

Objective: To develop a quickly and accurately method for determination of lead and cadmium in ginseng by Microwave digestion-graphite furnace atomic absorption spectrometry. Methods: After microwave digestion, the samples were determined directly by-graphite furnace atomic absorption spectrometry. Results: Lead showed good linearity in the concentration range of 0μg/L-40μg/L,and that the cadmium showed good linearity in the concentration range of 0μg/L-3μg/L.Both of the correlation coefficient were beteer than 0.9999. The detection limit of lead was 3.6μg/kg, and detection limit of cadmium was 0.42μg/kg. The relative standard deviation(RSD) of lead was9.11%,and the relative standard deviation(RSD) of cadmium was 4.70%. The standard addition recovery rate is between 93.3% ~ 106.7%. The method is simple, rapid, accurate and sensitive, is suitable for the determination of the content of lead and cadmium in ginseng.

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What this paper is about

Objective: To develop a quickly and accurately method for determination of lead and cadmium in ginseng by Microwave digestion-graphite furnace atomic absorption spectrometry. Methods: After microwave digestion, the samples were determined directly by-graphite furnace atomic absorption spectrometry. Results: Lead showed good linearity in the concentration range of 0μg/L-40μg/L,and that the cadmium showed good linearity in the concentration range of 0μg/L-3μg/L.Both of the correlation coefficient were beteer than 0.9999. The detection limit of lead was 3.6μg/kg, and detection limit of cadmium was 0.42μg/kg. The relative standard deviation(RSD) of lead was9.11%,and the relative standard deviation(RSD) of cadmium was 4.70%. The standard addition recovery rate is between 93.3% ~ 106.7%. The method is simple, rapid, accurate and sensitive, is suitable for the determination of the content of lead and cadmium in ginseng.

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Available abstract

Objective: To develop a quickly and accurately method for determination of lead and cadmium in ginseng by Microwave digestion-graphite furnace atomic absorption spectrometry. Methods: After microwave digestion, the samples were determined directly by-graphite furnace atomic absorption spectrometry. Results: Lead showed good linearity in the concentration range of 0μg/L-40μg/L,and that the cadmium showed good linearity in the concentration range of 0μg/L-3μg/L.Both of the correlation coefficient were beteer than 0.9999. The detection limit of lead was 3.6μg/kg, and detection limit of cadmium was 0.42μg/kg. The relative standard deviation(RSD) of lead was9.11%,and the relative standard deviation(RSD) of cadmium was 4.70%. The standard addition recovery rate is between 93.3% ~ 106.7%. The method is simple, rapid, accurate and sensitive, is suitable for the determination of the content of lead and cadmium in ginseng.

Key concepts: Graphite furnace atomic absorption, Microwave digestion, Detection limit, Cadmium, Chemistry, Analytical Chemistry (journal), Atomic absorption spectroscopy, Relative standard deviation

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