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• W2232147002 endingPage "33" @default.
• W2232147002 startingPage "24" @default.
• W2232147002 abstract "A method for the sensitive quantification of trace amounts of organic explosives in water samples was developed by using stir bar sorptive extraction (SBSE) followed by liquid desorption and ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). The proposed method was developed and optimized using a statistical design of experiment approach. Use of experimental designs allowed a complete study of 10 factors and 8 analytes including nitro-aromatics, amino-nitro-aromatics and nitric esters. The liquid desorption study was performed using a full factorial experimental design followed by a kinetic study. Four different variables were tested here: the liquid desorption mode (stirring or sonication), the chemical nature of the stir bar (PDMS or PDMS-PEG), the composition of the liquid desorption phase and finally, the volume of solvent used for the liquid desorption. On the other hand, the SBSE extraction study was performed using a Doehlert design. SBSE extraction conditions such as extraction time profiles, sample volume, modifier addition, and acetic acid addition were examined. After optimization of the experimental parameters, sensitivity was improved by a factor 5-30, depending on the compound studied, due to the enrichment factors reached using the SBSE method. Limits of detection were in the ng/L level for all analytes studied. Reproducibility of the extraction with different stir bars was close to the reproducibility of the analytical method (RSD between 4 and 16%). Extractions in various water sample matrices (spring, mineral and underground water) have shown similar enrichment compared to ultrapure water, revealing very low matrix effects." @default.
• W2232147002 created "2016-06-24" @default.
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• W2232147002 creator A5057774216 @default.
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• W2232147002 date "2016-02-01" @default.
• W2232147002 modified "2023-09-26" @default.
• W2232147002 title "Use of experimental design in the investigation of stir bar sorptive extraction followed by ultra-high-performance liquid chromatography–tandem mass spectrometry for the analysis of explosives in water samples" @default.
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• W2232147002 doi "https://doi.org/10.1016/j.chroma.2016.01.011" @default.
• W2232147002 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26777783" @default.
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