Abstract This paper presents the use of microwave induced plasma optical emission spectrometry (MIP OES) for food analysis. A method for determination of Cu, K, Mg, Mn, P, and Zn in instant soups by MIP OES with N2 plasma was developed. Sample preparation procedure consisted of microwave-assisted digestion with dilute nitric acid solution. Accuracy was evaluated based on the analysis of three certified reference materials: NIST 1515 (apple leaves), NIST 1568b (rice flour) and NIST 3234 (soy flour). Recoveries ranged from 83.3–107.5 % for target elements in these materials. Addition and recovery experiments were performed and recoveries ranged from 86.0–106.0 %. All determinations were performed using external calibration. Limits of detection for Cu, K, Mg, Mn, P, and Zn were 0.09, 4.9, 1.0, 0.04, 5.4 and 0.88 mg kg-1, respectively. Concentrations ranges of Cu, K, Mg, Mn, P and Zn in various types of instant soups samples were found between 1.31–13.8, 1135 - 17.824, 172–567, 1.72–12.1, 608 - 1826 and 2.90–12.1 mg kg-1, respectively. The use of N2 microwave-induced plasma is demonstrated as a low cost alternative for routine analysis.

中文翻译：

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微波诱导等离子体发射光谱法测定速溶汤中的多元素

摘要 本文介绍了微波诱导等离子体发射光谱法 (MIP OES) 在食品分析中的应用。建立了采用 N2 等离子体的 MIP OES 测定速溶汤中 Cu、K、Mg、Mn、P 和 Zn 的方法。样品制备程序包括用稀硝酸溶液进行微波辅助消解。准确度是基于对三种有证标准物质的分析进行评估的：NIST 1515（苹果叶）、NIST 1568b（米粉）和 NIST 3234（大豆粉）。这些材料中目标元素的回收率为 83.3-107.5%。进行了添加和回收实验，回收率范围为 86.0-106.0%。所有测定均使用外部校准进行。Cu、K、Mg、Mn、P 和 Zn 的检测限分别为 0.09、4.9、1.0、0.04、5.4 和 0.88 mg kg-1。在各种类型的速溶汤样品中，Cu、K、Mg、Mn、P 和 Zn 的浓度范围在 1.31-13.8、1135-17.824、172-567、1.72-12.1、608-1826 和 2.90-12 之间。 1、分别。使用 N2 微波诱导等离子体被证明是常规分析的低成本替代方案。