Evaluation of Chlorine Concentration and Stability, Oxidation-Reduction Potential (ORP), and pH in 2 Commercial Chlorine BasedDisinfectantsat Teat Dip Concentrations

Abstract

<p>The objective of this overall studywas to evaluate the chlorine concentrations and stability, ORP, and pH of 2 commercially available chlorine based disinfectant tablets (EfferCeptRand EfferCeptSGR) at concentrations or formulations based for teat dipping of dairy cows. The trial is stillongoing but 36 days of data are included. Initial ph values were 5.7-5.8 and similar among products. pH increased the 1stfew weeks and was higher in EF compared to SG ( 6.6 v. 6.2) , then decreased with EF still higher than SG (6.34 v. 5.98). Initial ORP values of the 1stsolutions were 900 mV and increased to 980 mV the 1stfew days.(EF and SG) . ORP levels over the 5 weeks were 950-960 mV (EG) and 970-980 mV (SG) with SG always slightly higher than EF. ORP levels of the 2ndset of EF and SG solutionswere initially ~ 980 mV and increased to > 1000 mV by 3 days. Overall ORP values show high oxidizing capacity and stability over time. Chlorine concentrations of EF and SG initially were 2200-2300 and 3000-3100 ppm, respectively. Chlorine concentrations remained higher in SG v. EF over the time period. Chlorine concentration decreased over the 36 day period but were still 1650 and 1800 ppm after 36 days. Overall, the 2 chlorine disinfectant solutions showed very high ORP levels over time, and also showed very effective chlorine concentrations over time.</p>