Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil.
Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil.
Food Chem. 2023 Dec 15;429:136916. doi: 10.1016/j.foodchem.2023.136916. Epub 2023 Jul 17.
This work presents the first report of the application of microwave-induced combustion in disposable vessels (MIC-DV) as a simple and fast sample preparation step for fluoride determination by ion-selective electrode (ISE) in leguminous seeds and oilseeds samples. Several experimental conditions of MIC-DV were evaluated, such as sample mass, absorbing solution, volume of combustion igniter, purging time with oxygen, and the use of successive combustion cycles. The accuracy of MIC-DV/ISE method was evaluated by comparing the results obtained by microwave-induced combustion and determination by ion chromatography, with agreements ranged from 94 to 106%. The method allowed to achieve relatively low limits of quantification (8.3 to 16 µg g) comparing to AOAC method (40 µg g), besides the use of small amounts of reagents, less handling of digests, making the method greener and with portable features comparing to other methods.
本工作首次报告了微波诱导燃烧在一次性容器（MIC-DV）中的应用，将其作为一种简单快速的样品前处理步骤，用于通过离子选择性电极（ISE）测定豆类种子和油料种子样品中的氟化物。对 MIC-DV 的几个实验条件进行了评估，例如样品质量、吸收溶液、燃烧引燃剂体积、用氧气吹扫时间以及连续燃烧循环的使用。通过比较微波诱导燃烧和离子色谱法测定的结果，评估了 MIC-DV/ISE 方法的准确性，结果在 94%至 106%之间。与 AOAC 方法（40 µg g）相比，该方法的定量限相对较低（8.3 至 16 µg g），并且使用了少量试剂，消化物处理量较少，与其他方法相比，该方法更加环保且具有便携性。
