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首页> 美国卫生研究院文献>The Journal of Automatic Chemistry >Influence of Digestion Procedure and Residual Carbon on Manganese Copper and Zinc Determination in Herbal Matrices by Atomic Absorption Spectrometry
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Influence of Digestion Procedure and Residual Carbon on Manganese Copper and Zinc Determination in Herbal Matrices by Atomic Absorption Spectrometry

机译：消解方法和残留碳对原子吸收光谱法测定草药基质中锰铜和锌的影响

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摘要

Mineralization to the complete oxidation of sample carbon component does not always assure the best analyte recovery. Particular attention should be paid to the presence of silicon in the investigated plant sample and especially in the certified reference material for which Si content is scarcely given by the providers. During mineralization without addition of the hydrofluoric acid, the residual carbon may block silica surfaces and increase availability of an analyte for its spectral determination in the solution. This issue is of particular relevance because standard protocols for digestion of plant matrices often do not support hydrofluoric acid addition. Several procedures recommended for decomposition of herbal plants were applied for the respective certified reference material and examined in detail. Manganese, copper, and zinc contents were analyzed in all samples by the flame atomic absorption spectrometry. Additionally, the residual carbon was determined in all mineralizates. Silicon content was analyzed by the X-ray fluorescence method. The best recoveries were observed for samples characterized by relatively high residual carbon.
机译：矿化到样品碳组分的完全氧化并不总是确保最佳的分析物回收率。应特别注意调查的植物样品中，特别是提供者几乎没有提供硅含量的经认证的参考材料中硅的存在。在不添加氢氟酸的矿化过程中，残留的碳可能会阻塞二氧化硅表面并增加分析物在溶液中进行光谱测定的可用性。该问题特别相关，因为用于消化植物基质的标准协议通常不支持添加氢氟酸。对于相应的认证参考材料，采用了推荐的几种草药分解方法，并进行了详细检查。通过火焰原子吸收光谱法分析了所有样品中的锰，铜和锌含量。另外，测定了所有矿化物中的残留碳。通过X射线荧光法分析硅含量。对于残留碳相对较高的样品，回收率最高。

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