{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T12:47:49Z","timestamp":1784724469977,"version":"3.55.0"},"reference-count":65,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2024,6,3]],"date-time":"2024-06-03T00:00:00Z","timestamp":1717372800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>The chemical industry explosion in the 20th century has led to increased environmental pollution, affecting fauna, flora, and waterways. These substances alter water\u2019s taste, color, and smell, making it unfit for consumption or toxic. Agricultural water networks face threats from pollution before and after treatment. Some chemical contaminants, like pesticides, are embedded in natural biogeochemical cycles. In this study, we developed a simple and low-cost procedure for the fabrication of needles coated with polydimethylsiloxane (PDMS) as an efficient sorbent for the microextraction of organic pollutant traces from water. The prepared needles were used as an alternative for commercial solid-phase micro-extraction (SPME) devices in analytical chemistry. The PDMS polymeric phase was characterized by Fourier-transform infrared spectroscopy (FT-IR), thermogravimetry (TGA), and scanning electron microscopy (SEM). The PDMS-coated needles were used for extraction of thirteen pesticides by direct-immersion solid-phase microextraction (DI-SPME) from contaminated waters, followed by determination with gas chromatography-mass spectrometry (GC-MS). The developed analytical method showed limits of detection (LODs) between 0.3 and 2.5 ng mL\u22121 and RSDs in the range of 0.8\u201312.2%. The homemade needles were applied for the extraction of pesticides in surface and ground aqueous samples collected from an agricultural area. Several target pesticides were identified and quantified in the investigated water samples.<\/jats:p>","DOI":"10.3390\/molecules29112628","type":"journal-article","created":{"date-parts":[[2024,6,3]],"date-time":"2024-06-03T08:19:42Z","timestamp":1717402782000},"page":"2628","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Development of In-Needle SPME Devices for Microextraction Applied to the Quantification of Pesticides in Agricultural Water"],"prefix":"10.3390","volume":"29","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-2812-5451","authenticated-orcid":false,"given":"Ahmed Ali","family":"Alshehri","sequence":"first","affiliation":[{"name":"Department of Chemistry, College of Science, Qassim University, Buraidah 51452, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4310-2686","authenticated-orcid":false,"given":"Bechir","family":"Hammami","sequence":"additional","affiliation":[{"name":"Department of Chemistry, College of Science, Qassim University, Buraidah 51452, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohammed Mousa","family":"Alshehri","sequence":"additional","affiliation":[{"name":"Saudi Food and Drug Authority, Riyadh 13513, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Taieb","family":"Aouak","sequence":"additional","affiliation":[{"name":"Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rabab A.","family":"Hakami","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Faculty of Since, King Khalid University, Abha 61413, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ahmed Yacine","family":"Badjah Hadj Ahmed","sequence":"additional","affiliation":[{"name":"Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,6,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"136","DOI":"10.1016\/j.scitotenv.2019.05.236","article-title":"A review of threats to groundwater quality in the anthropocene","volume":"684","author":"Burri","year":"2019","journal-title":"Sci. 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