کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5135070 1493411 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Subcritical water extraction combined with molecular imprinting technology for sample preparation in the detection of triazine herbicides
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Subcritical water extraction combined with molecular imprinting technology for sample preparation in the detection of triazine herbicides
چکیده انگلیسی


- A simple fast, environmentally friendly and cost-effective sample preparation procedure of MIP/SWE-MISPE was developed for the analysis of triazine herbicides.
- Addition of MIP during SWE increased the extraction efficiency of triazine herbicides, and using the MIP as a selective SPE sorbent improving the purifying effects.
- The MIP/SWE-MISPE coupled with LC-MS/MS method displayed good linearity and precision, and sufficiently low detection limits to correctly detect the studied compounds in soil samples.

A selective, environmentally friendly, and cost-effective sample extraction method based on a combination of subcritical water extraction (SWE) and molecularly imprinted solid-phase extraction (MISPE) was developed for the determination of eight triazine herbicides in soil samples by liquid chromatography-tandem mass spectrometry (LC-MS/MS). In SWE, the highest extraction yields of triazine herbicides were obtained under 150 °C for 15 min using 20% ethanol as the organic modifier. Addition of MIP during SWE increased the extraction efficiency, and using MIP as a selective SPE sorbent improved the enrichment capability. Soil samples were treated with the optimized extraction MIP/SWE-MISPE method and analyzed by LC-MS/MS. The novel technique was then applied to soil samples for the determination of triazine herbicides, and better recoveries (78.9%-101%) were obtained compared with using SWE-MISPE (30%-67%). Moreover, this newly developed method displayed good linearity (R2 > 0.99) and precision (2.7-9.8%), and low enough detection limits (0.4-3.3 μg kg−1). This combination of SWE and MIP technology is a simple, effective and promising method to selectively extract class-specific compounds in complex samples.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1515, 15 September 2017, Pages 17-22
نویسندگان
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