摘要:
采用空气-乙炔原子吸收法测定茶叶和茶汤中的K、Na,Ca、Mg、Mn、Cu、Zn和Pb。考察了茶和茶汤叶中共存的无机元素和有机成分对测定的影响,在选定的条件下,钾浓度大于0.80μg/ml时不存在电离干扰。铝锰比大于2和硅锰比大于1时,铝和硅干扰锰的测定,可加入释放剂Sr(NO3)2予以消除。
Abstract:
A method for the determination of K, Na, Ca, Mg, Mn, Cu, Zn and Pb in tea and tea-water by air-acetylene flame atomic absorption spectro-photometry has been developed. For tea, the determination was made after it was digested. Elements in tea-water were directly determinated without digestion and separation. The effects of coexistent inorganic elements and organic components in the samples, as well as the ionic interference of potassium on the determination have been studied. The interference of aluminum and silicon on the determination of manganese has been shown to be eliminated by adding Sr(NO3)2.
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