Pesticides are heavily employed compounds protecting crops, however, these compounds can be extremely harmful to human health. Once the monitoring of pesticides in foods is of great importance, in this work we propose a ready-to-use electrochemical sensor made with 3D printing technology, capable of detecting paraquat and carbendazim in sequential analysis. The proposed electrodes are lab-made and of easy obtention, composed of graphite on a polylactic acid matrix, and provided great results for the analysis of paraquat and carbendazim in honey, milk, juice, and water samples. The sequential analysis of paraquat and carbendazim was proposed, providing optimal analysis of both compounds individually when both are present in a mixture. Limits of detection of 0.01 and 0.03 µmol/L for paraquat and carbendazim, respectively. Recovery tests attested to the suitability of the method, ranging from 94.5 to 113.7 %, and the suitability of 3D printing for environmental and food samples analysis.

杀虫剂是大量使用的保护作物的化合物，但是，这些化合物可能对人类健康极为有害。一旦食品中的农药监测变得非常重要，在这项工作中，我们提出了一种使用 3D 打印技术制成的即用型电化学传感器，能够在顺序分析中检测百草枯和多菌灵。所提出的电极是实验室制造的，易于获取，由聚乳酸基体上的石墨组成，为分析蜂蜜、牛奶、果汁和水样中的百草枯和多菌灵提供了很好的结果。提出了百草枯和多菌灵的顺序分析，当这两种化合物存在于混合物中时，可以单独对这两种化合物进行最佳分析。百草枯和多菌灵的检测限分别为 0.01 和 0.03 µmol/L。