Automated infrared ashing with palladium nitrate as an ashing aid for the determination of selenium in plant foods by inductively coupled plasma mass spectrometry

IF 1.8 4区化学 Q3 CHEMISTRY, ANALYTICAL Analytical Sciences Pub Date : 2024-04-29 DOI:10.1007/s44211-024-00570-2

Ni Zhang, Tuankun Zhou, Man Ye, Xiaoming Yang, Zhiying Ding, Hang Gao

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Abstract

Based on the automatic light wave ashing instrument, palladium nitrate was used as an ashing aid for the first time to collect selenium in the process of food ashing pre-treatment, and a method for the determination of selenium in food by ashing method was established with inductively coupled plasma mass spectrometry. At the same time, the effects of magnesium nitrate, rhodium nitrate, and nickel nitrate as ashing aids on selenium collection were investigated using certified plant standard materials. The capture of selenium by magnesium nitrate, rhodium nitrate, and nickel nitrate as ashing aids did not exceed 50%. Using palladium nitrate as an ashing aid, six food standard materials were measured, with selenium recovery rates ranging from 97 to 106%. A complete analysis cycle can be completed within an hour. The method detection limit of selenium was 0.021 μg g⁻¹, and the relative standard deviation of five measurements was less than 7%. The experimental results show that palladium nitrate is an excellent ashing aid for capturing selenium, and it is far superior to the other three aids. In addition, the mechanism of palladium nitrate as an ashing aid for capturing selenium was discussed.

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用硝酸钯作为灰化辅助剂进行自动红外灰化，以电感耦合等离子体质谱法测定植物性食品中的硒。

在自动光波灰化仪的基础上，首次使用硝酸钯作为灰化助剂，在食品灰化前处理过程中收集硒，并建立了灰化法与电感耦合等离子体质谱法测定食品中硒的方法。同时，利用经认证的植物标准材料研究了硝酸镁、硝酸铑和硝酸镍等灰化助剂对硒收集的影响。硝酸镁、硝酸铑和硝酸镍对硒的捕获率均未超过 50%。使用硝酸钯作为灰化助剂，测量了六种食品标准材料，硒的回收率在 97% 到 106% 之间。一个完整的分析周期可在一小时内完成。硒的方法检出限为 0.021 μg g-1，5 次测量的相对标准偏差小于 7%。实验结果表明，硝酸钯是一种捕集硒的优良灰化助剂，其效果远远优于其他三种助剂。此外，还讨论了硝酸钯作为捕集硒的灰化助剂的机理。

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来源期刊

Analytical Sciences 化学-分析化学

CiteScore

2.90

自引率

18.80%

发文量

232

审稿时长

1 months

期刊介绍： Analytical Sciences is an international journal published monthly by The Japan Society for Analytical Chemistry. The journal publishes papers on all aspects of the theory and practice of analytical sciences, including fundamental and applied, inorganic and organic, wet chemical and instrumental methods. This publication is supported in part by the Grant-in-Aid for Publication of Scientific Research Result of the Japanese Ministry of Education, Culture, Sports, Science and Technology.