Determination of linuron in water samples by high performance liquid chromatography after preconcentration with octadecyl silanized magnetite
Determination of linuron in water samples by high performance liquid chromatography after preconcentration with octadecyl silanized magnetite
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DOI：
10.1016/j.microc.2006.07.001
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发表时间：
2007-04
影响因子：
4.8
通讯作者：
H. Katsumata;Hayato Asai;S. Kaneco;Tohru Suzuki;K. Ohta
中科院分区：
文献类型：
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作者：
H. Katsumata;Hayato Asai;S. Kaneco;Tohru Suzuki;K. Ohta
提出了一种灵敏、选择性的批量吸附方法用于利谷隆的预富集和测定。以十八烷基硅烷化（ODS）磁铁矿为吸附剂，对利谷隆进行富集，然后用高效液相色谱（HPLC）进行测定。对分析物回收率的几个参数进行了研究。实验结果表明，当溶液pH为6时，用100 mL含1.0 μ g利谷隆和3 mL乙醇的样品溶液作为解吸液，可以获得足够的富集效率。利谷隆的回收率为50.7 ± 1.9%，相对标准偏差为3.0%。利谷隆的标准曲线在200 ng mL − 1范围内呈线性，相关系数为0.998，检测限（3S/N）为1.0 ng mL − 1。还检查了吸附剂的容量，发现对于利谷隆为0.15 mg g − 1。ODS-磁铁矿适合重复使用而不降低至少4个吸附-解吸循环的回收率。该方法用于河水中利谷隆的测定，具有较高的精密度和准确度。
A sensitive and selective batch adsorption method is proposed for the preconcentration and determination of linuron. Linuron was preconcentrated on octadecyl silanized (ODS) magnetite as an adsorbent and then determined by high performance liquid chromatography (HPLC). Several parameters on the recovery of the analyte were investigated. The experimental results showed that it was possible to obtain sufficient preconcentration efficiency when the solution pH was 6 using 100 mL of sample solution containing 1.0 μg of linuron and 3 mL of ethanol as a desorption solution. Recovery of linuron was 50.7±1.9% with a relative standard deviation for five determinations of 3.0% under optimum conditions. The calibration curve of linuron was linear up to 200 ng mL−1with a correlation coefficient of 0.998 and the detection limit (3S/N) was 1.0 ng mL−1. The capacity of the adsorbent was also examined and found to be 0.15 mg g−1for linuron. ODS-magnetite is suitable for repeated use without decreasing recovery at least 4 adsorption–desorption cycles. The proposed method was successfully applied to the determination of linuron in river water with high precision and accuracy.