Department of Chemistry, Faculty of Engineering, Rajamangala University of Technology Isan, Khon Kaen Campus, Khon Kaen 40000, Thailand.
Materials Chemistry Research Unit, Department of Chemistry, Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.
Anal Methods. 2021 Dec 9;13(47):5735-5748. doi: 10.1039/d1ay01435h.
Layered-double hydroxides (LDHs) modified with anionic surfactants a co-precipitation method were developed for preconcentrating and simultaneous analysis of six benzoylurea insecticides (BUs) by high-performance liquid chromatography (HPLC). The anionic surfactants with different chain lengths, including sodium dodecylbenzene sulfonate (SDBS), sodium dodecyl sulfate (SDS), sodium 1-nonane sulfonate (SNS), and sodium 1-hexane sulfonate monohydrate (SHS) were investigated to improve the extraction efficiency of LDHs. The SDBS-LDHs provided the highest efficiency for the enrichment of the BUs studied. Under the chosen conditions, enrichment factors in the range of 38-69 and detection limits in the range of 0.1-0.3 μg L were achieved. Good reproducibilities (RSD < 13.8%) and recoveries (71.4-118.7%) were also obtained. The proposed preconcentration method, used as an procedure offers rapid and simple simultaneous preparation of LDHs and extraction of BUs. The method was successfully applied for residue analysis of BUs in fruit- and flower-derived soft drink samples.
层状双氢氧化物（LDHs）经阴离子表面活性剂改性，采用共沉淀法，通过高效液相色谱（HPLC）对 6 种苯甲酰脲类杀虫剂（BUs）进行预浓缩和同时分析。研究了不同链长的阴离子表面活性剂，包括十二烷基苯磺酸钠（SDBS）、十二烷基硫酸钠（SDS）、正十一烷磺酸钠（SNS）和单水合正己烷磺酸钠（SHS），以提高 LDHs 的萃取效率。SDBS-LDHs 对所研究的 BUs 的富集效率最高。在所选择的条件下，实现了 38-69 的富集因子和 0.1-0.3μg/L 的检测限。还获得了良好的重现性（RSD<13.8%）和回收率（71.4-118.7%）。所提出的预浓缩方法作为一种前处理方法，提供了快速简单的 LDHs 制备和 BUs 萃取。该方法成功应用于水果和花卉衍生软饮料样品中 BUs 的残留分析。
