采用能量色散 X 射线荧光法快速直接测定饮料中的锡。
Rapid direct determination of tin in beverages using energy dispersive X-ray fluorescence.
机构信息
Department of Chemistry, Israel Atomic Energy Commission, Tel Aviv, Israel.
Department of Analytical Chemistry, Nuclear Research Center Negev, P.O. Box 9001, Beer Sheva, Israel.
出版信息
Talanta. 2019 Jul 1;199:662-666. doi: 10.1016/j.talanta.2019.03.024. Epub 2019 Mar 4.
This article presents a new method for the simpler and faster determination of tin in beverages using EDXRF. Absorption coefficients for aqueous calibration samples were calculated and shown to be nearly identical to those of the beverage samples, thus permitting the use of aqueous standard solutions for external calibration. Beverage samples could then be measured directly using the external calibration. Determination of tin using this method takes 4 min. The LOD and LOQ were 4 mg L and 15 mg L respectively, and the precision was 3.89%. Different canned beverages (cold coffee, various fruit juices) were measured and the results compared to the concentrations obtained using ICP-OES after digestion. The two methods showed good compatibility, thus establishing the newly developed method as a rapid, simple, and accurate method for the determination of tin in beverages.
本文提出了一种使用 EDXRF 更简单、更快速地测定饮料中锡的新方法。计算了水相校准样品的吸收系数，结果表明其与饮料样品的吸收系数几乎相同，因此可以使用水相标准溶液进行外部校准。然后可以使用外部校准直接测量饮料样品。使用该方法测定锡需要 4 分钟。LOD 和 LOQ 分别为 4 mg/L 和 15 mg/L，精密度为 3.89%。对不同的罐装饮料（冷咖啡、各种果汁）进行了测定，并将结果与消解后用 ICP-OES 测定的浓度进行了比较。两种方法具有良好的兼容性，因此新开发的方法被确立为一种快速、简单、准确的测定饮料中锡的方法。
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