Background and purpose: Organophosphorous insecticides are chemical substances that are widely used globally against plant pests and diseases, led to an increase in farm productivity. On the other hand, their excessive use/misuse especially in the developing countries, their volatility, long-distance transports eventually results in widespread environmental contamination that creating serious acute health problem. On behalf of the large volume of consumption of rice in mazandaran province which is the pole of rice agriculture in Iran, we tried to measure the Organophosphorus Insecticide Residue levels in Tarom and Khazar rice collected from Amol city. Materials and methods: Determination of organophosphore insecticide (Diazinon, Durasban, Malation) residues in the rice samples were performed by means of Gas chromatography (GC-MS) method. The extraction process was done using n-hexane. In this study, the pesticide residue levels were determined as ppb. All results were statistically analyzed by one way-ANOVA and student t-test, and then by Tukey-post test to compare the pesticides residue levels founded in the rice samples (P < 0.05). Results: The results indicated that all rice samples consisted of Diazinon and Durasban pesticides. Despite the all samples, the rice collected from western region of Amol city showed the pesticide residues higher than the standard levels. Conclusion: The results showed that Diazinon and Durasban pesticides are found in all samples. According to the WHO recommended limits, the investigation showed elevating levels of the pesticides in rice. Thus, a serious notification to the pollution, which can lead to ecosystem and food chain contamination, is necessary.

Keywords: Organophosphorous residue, Rice, Gas chromatography

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