Ozone degradation of prometryn in Ruditapes philippinarum: response surface methodology optimization and toxicity assessment

What is it about?

This study optimized the method for ozone degradation of prometryn in Ruditapes philippinarum, and evaluated the toxicity changes during the ozone degradation. Firstly, the method of gas chromatography for the detection of prometryn was appropriately improved. The linear range was 5-500 ng/mL with R2 of 0.9964. The addition concentration of prometryn was 0.025-0.100 mg/kg, the recovery was 77.97%-85.00%, the relative standard deviation (n=6) was 2.36%-7.86%, and the limit of detection was 0.3 μg/kg. Employing the central composite design in two experiments—ozone as gas and ozone dissolved in water, three variables: ozone concentration, temperature, and exposure time on the effect of degradation rate were studied. O3 concentration was 4.2 mg/L, temperature was 40°C, exposure time was 10 min, the maximum degradation rate was 89.94% and 89.69%, respectively.

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