Analysis of triazine and chlorothalonil pesticides in river water using solid phase extraction and gas chromatography
Also available in printed version
| मुख्य लेखक: | |
|---|---|
| अन्य लेखक: | |
| स्वरूप: | Bachelor thesis |
| भाषा: | अंग्रेज़ी |
| प्रकाशित: |
Universiti Teknologi Malaysia
2025
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| विषय: | |
| ऑनलाइन पहुंच: | https://utmik.utm.my/handle/123456789/46454 |
| Abstract | Abstract here |
| _version_ | 1854975106411921408 |
|---|---|
| author | Siti Nur Aishah Mohd. Ali |
| author2 | Jafariah Jaafar, supervisor |
| author_facet | Jafariah Jaafar, supervisor Siti Nur Aishah Mohd. Ali |
| author_sort | Siti Nur Aishah Mohd. Ali |
| description | Also available in printed version |
| format | Bachelor thesis |
| id | utm-123456789-46454 |
| institution | Universiti Teknologi Malaysia |
| language | English |
| publishDate | 2025 |
| publisher | Universiti Teknologi Malaysia |
| record_format | dspace |
| record_pdf | Abstract |
| spelling | utm-123456789-464542025-08-21T10:55:58Z Analysis of triazine and chlorothalonil pesticides in river water using solid phase extraction and gas chromatography Siti Nur Aishah Mohd. Ali Jafariah Jaafar, supervisor Science Also available in printed version Widely used triazine herbicide and chlorothalonil fungicide may give a toxicity impact towards the environment and human health. A suitable method for the analysis of pesticide residues in river water sample was investigated in this study based on solid phase extraction (SPE) and gas chromatography (GC). Sampling was conducted at Syarikat Air Johor, Skudai Water Treatment Plant at the raw water intake point. Pesticide residues were extracted by two different solvents which are acetonitrile and ethyl acetate. The river water sample was filtered and passed through the C18 cartridge which was preconditioned with methanol and purified water at the flow-rate of 4 mL min-1 using the SPE vacuum manifold. After the sample was applied, the cartridge was kept under vacuum for 5 min to remove any residual water. The analytes retained on the cartridge were eluted by 4 mL of acetonitrile and ethyl acetate. The effluents were collected into vials and condensed to dryness under a gentle flow of nitrogen at room temperature and re-dissolved with acetonitrile for analysis. The presence of triazine and chlorothalonil was determined using gas chromatography mass selective detector (GC-MSD). From the results of the study, calibration graphs are linear in the range from 100 to 1000 �g/L for triazine with coefficient of determination (r2) of 0.995 and 50000 to 30 000 �g/L with coefficient of determination (r2) of 0.994 for chlorothalonil. The limits of detection (LOD) were 100 �g/L for triazine and 3300 �g/L for chlorothalonil. Meanwhile, the limits of quantitation (LOQ) were 340 �g/L for triazine and 10900 �g/L for chlorothalonil. From this study, the concentration of triazine were 1300 �g/L with acetonitrile as the eluting solvent and 2800 �g/L with ethyl acetate as the eluting solvent. These concentrations did not exceed the Malaysian allowable limit which is not more that 50 mg/L. While, chlorothalonil was not found in the analysis and its can be assumed that Sg. Skudai were not polluted by chlorothalonil zulaihi UTM 54 p. Project Paper (Sarjana Muda Sains (Kimia Industri)) - Universiti Teknologi Malaysia, 2015 2025-03-12T05:05:24Z 2025-03-12T05:05:24Z 2015 Bachelor thesis https://utmik.utm.my/handle/123456789/46454 vital:122087 valet-20190314-15008 ENG Closed Access UTM Complete Unpublished Completion application/pdf Universiti Teknologi Malaysia |
| spellingShingle | Science Siti Nur Aishah Mohd. Ali Analysis of triazine and chlorothalonil pesticides in river water using solid phase extraction and gas chromatography |
| thesis_level | Other |
| title | Analysis of triazine and chlorothalonil pesticides in river water using solid phase extraction and gas chromatography |
| title_full | Analysis of triazine and chlorothalonil pesticides in river water using solid phase extraction and gas chromatography |
| title_fullStr | Analysis of triazine and chlorothalonil pesticides in river water using solid phase extraction and gas chromatography |
| title_full_unstemmed | Analysis of triazine and chlorothalonil pesticides in river water using solid phase extraction and gas chromatography |
| title_short | Analysis of triazine and chlorothalonil pesticides in river water using solid phase extraction and gas chromatography |
| title_sort | analysis of triazine and chlorothalonil pesticides in river water using solid phase extraction and gas chromatography |
| topic | Science |
| url | https://utmik.utm.my/handle/123456789/46454 |
| work_keys_str_mv | AT sitinuraishahmohdali analysisoftriazineandchlorothalonilpesticidesinriverwaterusingsolidphaseextractionandgaschromatography |