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Determination of Pb and Cd in spirulina by ICP-MS

Shi Yu-ping

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Abstract

Three digesting methods such as microwave, high-pressure sealed jar and HNO_3+HClO_4 were compared to dispose spirulina samples. A method for determination of trace Pb and Cd in spirulina with microwave digestion-ICP-MS was established. The detection limits for Pb and Cd were 0.06 ng/mL and 0.05 ng/mL, respectively. The RSD was less than 3% with recoveries of 98%～101%. The method was applied to the determination of Pb and Cd in spirulina samples with satisfactory results.

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What this paper is about

Three digesting methods such as microwave, high-pressure sealed jar and HNO_3+HClO_4 were compared to dispose spirulina samples. A method for determination of trace Pb and Cd in spirulina with microwave digestion-ICP-MS was established. The detection limits for Pb and Cd were 0.06 ng/mL and 0.05 ng/mL, respectively. The RSD was less than 3% with recoveries of 98%～101%. The method was applied to the determination of Pb and Cd in spirulina samples with satisfactory results.

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Available abstract

Three digesting methods such as microwave, high-pressure sealed jar and HNO_3+HClO_4 were compared to dispose spirulina samples. A method for determination of trace Pb and Cd in spirulina with microwave digestion-ICP-MS was established. The detection limits for Pb and Cd were 0.06 ng/mL and 0.05 ng/mL, respectively. The RSD was less than 3% with recoveries of 98%～101%. The method was applied to the determination of Pb and Cd in spirulina samples with satisfactory results.

Key concepts: Spirulina (dietary supplement), Chemistry, Microwave digestion, Chromatography, Detection limit, Inductively coupled plasma mass spectrometry, Mass spectrometry, Raw material

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