Simazine is a common broad-leaf and annual grass herbicide used worldwide. It was deemed unsafe by the Environmental Protection Agency but has since acquired its Reregistration Eligibility Decision in 2006. Using Differential Pulse Voltammetry to analyze simazine, a 100mL stock solution of 2.0241*10-4M is prepared with 0.0040g of simazine in methanol. A buffer solution made with 1L of 0.1M Na2SO4 and H2SO4 is added drop wise until pH is 1.20. 10mL of the buffer is pipetted into a sample holder and 10�L of the simazine standard is added after each scan of DPV. After five scans, the detection limit is calculated to be 1.0771*10-7M, or 0.0213ppm. The oral Median Lethal Dose of simazine is > 5g kg-1, or 5000 ppm. The advantages of DPV to monitor contamination levels in water are (1) its low cost, (2) its simplicity, and (3) its effectiveness in detecting trace amounts of compound in solution.

Electrochemical trace analysis of simazine

245th National Meeting (2013)

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