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A simple spectroscopic method to determine dimethoate in water samples by complex formation.
Journal of Environmental Science and Health, Part B ( IF 2 ) Pub Date : 2019-11-29 , DOI: 10.1080/03601234.2019.1696095 Aline Romero-Natale 1 , Georgette Rebollar-Pérez 2 , Irmene Ortiz 3 , María Guadalupe Tenorio-Arvide 1 , Ricardo Munguía-Pérez 1 , Ilaria Palchetti 4 , Eduardo Torres 1
Journal of Environmental Science and Health, Part B ( IF 2 ) Pub Date : 2019-11-29 , DOI: 10.1080/03601234.2019.1696095 Aline Romero-Natale 1 , Georgette Rebollar-Pérez 2 , Irmene Ortiz 3 , María Guadalupe Tenorio-Arvide 1 , Ricardo Munguía-Pérez 1 , Ilaria Palchetti 4 , Eduardo Torres 1
Affiliation
A simple and rapid method for the determination of dimethoate in water was developed based on the monitoring of the complex formation between bis 5-phenyldipyrrinate of nickel (II) and the herbicide dimethoate. The method showed a short response time (10 s), high selectivity (very low interference from other sulfate and salts), high sensitivity (limit of detection (LOD) 0.45 µM, limit of quantitation (LOQ) of 1.39 µM), and a Kd of 2.4 µM. Stoichiometry experiments showed that complex formation occurred with a 1:1 relation. The method was applied to different environmental water samples such as lagoon, stream, urban, and groundwater samples. The results indicated that independently from the water source, the method exhibited high precision (0.25-2.47% variation coefficient) and accuracy (84.42-115.68% recovery). In addition, the method was also tested using an effluent from a wastewater treatment plant from Mexico; however, the results indicated that the presence of organic matter had a pronounced effect on the detection.
中文翻译:
一种简单的光谱法,通过络合物的形成测定水样中的乐果。
基于监测镍(II)的双5-苯基二吡咯酸酯与除草剂乐果的络合物形成,开发了一种简单快速的测定水中乐果的方法。该方法显示响应时间短(10 s),选择性高(对其他硫酸盐和盐类的干扰非常低),灵敏度高(检测限(LOD)0.45 µM,定量限(LOQ)1.39 µM)和Kd为2.4 µM。化学计量学实验表明,复合物的形成以1:1的关系发生。该方法已应用于不同的环境水样,例如泻湖,河流,城市和地下水样。结果表明,该方法独立于水源,具有较高的精密度(变异系数为0.25-2.47%)和准确度(回收率为84.42-115.68%)。此外,还使用来自墨西哥废水处理厂的废水对该方法进行了测试;但是,结果表明有机物的存在对检测有明显的影响。
更新日期:2020-04-18
中文翻译:
一种简单的光谱法,通过络合物的形成测定水样中的乐果。
基于监测镍(II)的双5-苯基二吡咯酸酯与除草剂乐果的络合物形成,开发了一种简单快速的测定水中乐果的方法。该方法显示响应时间短(10 s),选择性高(对其他硫酸盐和盐类的干扰非常低),灵敏度高(检测限(LOD)0.45 µM,定量限(LOQ)1.39 µM)和Kd为2.4 µM。化学计量学实验表明,复合物的形成以1:1的关系发生。该方法已应用于不同的环境水样,例如泻湖,河流,城市和地下水样。结果表明,该方法独立于水源,具有较高的精密度(变异系数为0.25-2.47%)和准确度(回收率为84.42-115.68%)。此外,还使用来自墨西哥废水处理厂的废水对该方法进行了测试;但是,结果表明有机物的存在对检测有明显的影响。