Development Of Non-Ionic Silicone Surfactant-Based Extraction Methods Of Triazine Herbicides In Milk And Water Samples

Cloud point extraction (CPE) – spectrophotometric method had been developed for separation of atrazine and propazine using non-ionic silicone surfactant, polysiloxane polyether, as a new approach of triazine compounds extractor in the CPE. This type of surfactants was chosen as a green extraction so...

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主要作者:	Mohd, Nur Izzaty
格式:	Thesis
語言:	English
出版:	2018
主題:	R735-854 Medical education Medical schools Research
在線閱讀:	http://eprints.usm.my/48204/1/NUR%20IZZATY%20BINTI%20MOHD_hj.pdf
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id	my-usm-ep.48204
record_format	uketd_dc
spelling	my-usm-ep.482042021-01-26T06:48:07Z Development Of Non-Ionic Silicone Surfactant-Based Extraction Methods Of Triazine Herbicides In Milk And Water Samples 2018-08 Mohd, Nur Izzaty R735-854 Medical education. Medical schools. Research Cloud point extraction (CPE) – spectrophotometric method had been developed for separation of atrazine and propazine using non-ionic silicone surfactant, polysiloxane polyether, as a new approach of triazine compounds extractor in the CPE. This type of surfactants was chosen as a green extraction solvent because of its structure and properties. There were two types of polysiloxane polyether (OFX 0309 and DC 193C) were studied in the CPE to investigate their effectiveness as extractor toward triazine compounds. Performance recovery of CPE can be observed when the following conditions was applied; CPE-OFX 0309, 1.0 mL 0.4 v/v % surfactant concentration, solution pH at 5, 2.0 M of Na2SO4, incubation time for 15 minute at 50 °C dan sample volume of 1mL at concentration of 10 mg/L while for CPE-DC 193C; the same conditions was applied except for concentration of salt used (1.5 M of Na2SO4). Using the optimized parameters, CPE was applied in milk and water samples. Langmuir model was found to fit well with the solubilization of the triazine compounds into the OFX 0309 and DC193C surfactant. Thus, Langmuir isotherm has been used to explain the solubilization study between surfactant and triazine compounds. The thermodynamic parameters were determined such as Gibbs free energy (ΔGº) which increases with temperature, value of enthalpy (ΔHº) and value of entropy (ΔSº) which increase with the surfactant hydrophobicity. The thermodynamic results indicated that the solubilization of the triazine compounds solubilized into the both surfactants were feasible, spontaneous and endothermic. 2018-08 Thesis http://eprints.usm.my/48204/ http://eprints.usm.my/48204/1/NUR%20IZZATY%20BINTI%20MOHD_hj.pdf application/pdf en public masters Universiti Sains Malaysia Institut Perubatan & Pergigian Termaju
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	R735-854 Medical education Medical schools Research
spellingShingle	R735-854 Medical education Medical schools Research Mohd, Nur Izzaty Development Of Non-Ionic Silicone Surfactant-Based Extraction Methods Of Triazine Herbicides In Milk And Water Samples
description	Cloud point extraction (CPE) – spectrophotometric method had been developed for separation of atrazine and propazine using non-ionic silicone surfactant, polysiloxane polyether, as a new approach of triazine compounds extractor in the CPE. This type of surfactants was chosen as a green extraction solvent because of its structure and properties. There were two types of polysiloxane polyether (OFX 0309 and DC 193C) were studied in the CPE to investigate their effectiveness as extractor toward triazine compounds. Performance recovery of CPE can be observed when the following conditions was applied; CPE-OFX 0309, 1.0 mL 0.4 v/v % surfactant concentration, solution pH at 5, 2.0 M of Na2SO4, incubation time for 15 minute at 50 °C dan sample volume of 1mL at concentration of 10 mg/L while for CPE-DC 193C; the same conditions was applied except for concentration of salt used (1.5 M of Na2SO4). Using the optimized parameters, CPE was applied in milk and water samples. Langmuir model was found to fit well with the solubilization of the triazine compounds into the OFX 0309 and DC193C surfactant. Thus, Langmuir isotherm has been used to explain the solubilization study between surfactant and triazine compounds. The thermodynamic parameters were determined such as Gibbs free energy (ΔGº) which increases with temperature, value of enthalpy (ΔHº) and value of entropy (ΔSº) which increase with the surfactant hydrophobicity. The thermodynamic results indicated that the solubilization of the triazine compounds solubilized into the both surfactants were feasible, spontaneous and endothermic.
format	Thesis
qualification_level	Master's degree
author	Mohd, Nur Izzaty
author_facet	Mohd, Nur Izzaty
author_sort	Mohd, Nur Izzaty
title	Development Of Non-Ionic Silicone Surfactant-Based Extraction Methods Of Triazine Herbicides In Milk And Water Samples
title_short	Development Of Non-Ionic Silicone Surfactant-Based Extraction Methods Of Triazine Herbicides In Milk And Water Samples
title_full	Development Of Non-Ionic Silicone Surfactant-Based Extraction Methods Of Triazine Herbicides In Milk And Water Samples
title_fullStr	Development Of Non-Ionic Silicone Surfactant-Based Extraction Methods Of Triazine Herbicides In Milk And Water Samples
title_full_unstemmed	Development Of Non-Ionic Silicone Surfactant-Based Extraction Methods Of Triazine Herbicides In Milk And Water Samples
title_sort	development of non-ionic silicone surfactant-based extraction methods of triazine herbicides in milk and water samples
granting_institution	Universiti Sains Malaysia
granting_department	Institut Perubatan & Pergigian Termaju
publishDate	2018
url	http://eprints.usm.my/48204/1/NUR%20IZZATY%20BINTI%20MOHD_hj.pdf
_version_	1747821900848955392

Development Of Non-Ionic Silicone Surfactant-Based Extraction Methods Of Triazine Herbicides In Milk And Water Samples

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