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2008•Chinese Journal of Analysis LaboratoryRequires access

Determination of trace heavy metallic elements in tea by axial-view ICP-AES with microwave digestion

Qiu Hui

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Abstract

A method of microwave digestion axial-view ICP-AES was applied to the determination of trace elements of heave metals such as lead,arseic,cadmium,copper and iron in tea.Operation parameters of ICP-AES and conditions were optimized and selected.The detection limits were Pb: 2.9×103 μg/mL,As: 5.2×103 μg/mL,Cd: 0.056×103 μg/mL,Cu: 0.55×103 μg/mL,Fe: 0.59×103 μg/mL.The RSDs were in the range of 1.7%～8.5% and the recoveries were in the range of 90%～104%.This method was compared with the national standard method and their resultes showed no significant difference from those of the national standard method.The resultes were satisfactory.

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What this paper is about

A method of microwave digestion axial-view ICP-AES was applied to the determination of trace elements of heave metals such as lead,arseic,cadmium,copper and iron in tea.Operation parameters of ICP-AES and conditions were optimized and selected.The detection limits were Pb: 2.9×103 μg/mL,As: 5.2×103 μg/mL,Cd: 0.056×103 μg/mL,Cu: 0.55×103 μg/mL,Fe: 0.59×103 μg/mL.The RSDs were in the range of 1.7%～8.5% and the recoveries were in the range of 90%～104%.This method was compared with the national standard method and their resultes showed no significant difference from those of the national standard method.The resultes were satisfactory.

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Available abstract

A method of microwave digestion axial-view ICP-AES was applied to the determination of trace elements of heave metals such as lead,arseic,cadmium,copper and iron in tea.Operation parameters of ICP-AES and conditions were optimized and selected.The detection limits were Pb: 2.9×103 μg/mL,As: 5.2×103 μg/mL,Cd: 0.056×103 μg/mL,Cu: 0.55×103 μg/mL,Fe: 0.59×103 μg/mL.The RSDs were in the range of 1.7%～8.5% and the recoveries were in the range of 90%～104%.This method was compared with the national standard method and their resultes showed no significant difference from those of the national standard method.The resultes were satisfactory.

Key concepts: Chemistry, Microwave digestion, Cadmium, Inductively coupled plasma atomic emission spectroscopy, Copper, Detection limit, Metal, Microwave

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