https://vital.seals.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://vital.seals.ac.za/vital/access/manager/Repository/vital:4288 Wed 12 May 2021 23:05:00 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4559 Wed 12 May 2021 19:26:07 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4486 Wed 12 May 2021 18:44:44 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4501 0. 96), demonstrating the fiber affinity to retain both polar and non-polar compounds opening a possibility to be used as sorbent for sample preparation of different classes of pesticides in water. For the second part of the study simple strategies for colorimetric sensing based on silver nanoparticles and polivinylpyrrolidone capped nanoparticles were developed, respectively for atrazine and chlorpyrifos detection. The limits of detection of the methods were 3.32 and 0.88 mg/L for atrazine and chlorpyrifos respectively. The applicability of the probe in real samples was demonstrated by the recoveries studies of tap water varying from 94 to 104 percent. The versatility of the probe was demonstrated by affording a simple, rapid and selective detection of atrazine and chlorpyrifos in the presence of other pesticides by direct analysis without employing any sample handling steps. Attempt to incorporate the probes in a solid support was achieved by using nylon 6 as solid support polymer proving to be fast and useful for on-site detection.]]> Wed 12 May 2021 17:40:49 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4406 0.9990) was attained for most analytes. The limits of detection and quantification ranged from 0.03 - 0.84 μg/ml and 0.81 - 1.89 μg/ml respectively for analytes in biological samples. LODs and LOQs for analytes in food and environmental samples ranged from 0.02 to 0.39 and 0.25 to 1.30 ng/g respectively.]]> Wed 12 May 2021 17:31:55 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4453 Wed 12 May 2021 16:31:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3868 Thu 13 May 2021 02:18:46 SAST ]]>