Phua, Chai Tin (2016) Determination of selected heavy metals content in tobacco leaves and local cigarette from Kota Marudu, Sabah. Universiti Malaysia Sabah. (Unpublished)
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Abstract
Tobacco (Nicotiana tabaccum) is a commercial plant that is naturally accumulate and concentrate relatively high levels of heavy metals. It is one of the basic agricultural products with social and economic importance. However, there is no much report in the literature on the determination of heavy metals levels in tobacco leaves and local cigarettes. Hence this study is an initial attempt to investigate the accumulation level of selected heavy metals (Cd, Co, Cr, Cu, Fe, Mg, Ni, Pb & Zn) concentration in tobacco leaves and local cigarettes of Kota Marudu, Sabah. Digestion of all samples was done using an acid digestion method which is using nitric acid (HN03). However, the methods that used to digest the samples of tobacco leaves and local cigarettes are different. Digestion of tobacco leaves was undergo 85°C-150°C for 2 hours whereas for local cigarettes was 100°C for 2 hours. Inductively Coupled Plasma- Optical Emission Spectrometry( ICP-OES)is used to determine the concentration of heavy metals. Analysis from ICP-OES shows the accumulation of heavy metals in tobacco leaves are Co<Pb<Cr<Cd<Cu<Ni<Zn<Fe<Mg whereas the sequence for local cigarettes is Co<Pb<Cd<Cr<Ni<Cu<Zn<Fe<Mg. Highest heavy metals found in both tobacco leaves samples and local cigarettes samples are Mg with the value of 217.395mg/L ±13.072 and 217.743mg/L ± 9.374 respectively. On the other hand, the lowest heavy metals that found in both samples is Co with the concentration of 0.022mg/L ± 0.017 in tobacco leaves and 0.033mg/L ± 0.001 in local cigarettes. Using Pearson's Two Tailed Correlation, Co, Cu, Fe and Ni in tobacco leaves is no significant correlation with the metals in local cigarettes. The only significant correlation was observed between them for some metals.
| Item Type: | Academic Exercise |
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| Keyword: | heavy metals, tobacco leaves, local cigarettes, Nicotiana tabaccum |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences |
| Department: | FACULTY > Faculty of Science and Natural Resources |
| Depositing User: | MUNIRA BINTI MARASAN - |
| Date Deposited: | 27 Nov 2017 09:50 |
| Last Modified: | 27 Nov 2017 09:50 |
| URI: | https://eprints.ums.edu.my/id/eprint/17670 |
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