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目的验证去极化法氧化还原电位(oxidationreduction potential,ORP)在线监测游泳池水质的准确性。方法 2013年6月采用去极化法测定ORP和传统测定法对试验游泳池和对照游泳池水质进行监测,指标包括pH值、氧化还原电位值、三氯甲烷浓度、细菌总数、总大肠菌群,对结果进行统计分析。计量资料采用t检验,P<0.05为差异有统计学意义。结果在线监测ORP(709.6±4.0)mV,pH值(7.37±0.06);SX721现场数据ORP(707.2±3.7)mV,pH值(7.39±0.06);6810现场数据ORP(707.7±4.1)mV,pH值(7.39±0.07),差异均无统计学意义(均P>0.05)。采用在线ORP监测能控制水中余氯浓度,减少游泳池水中三氯甲烷生成。结论 ORP在线监测设备运行稳定,可用于游泳池水中的ORP长期在线监测,有效控制游泳池水中三氯甲烷浓度,并能保证有效控制微生物。
Objective To verify the accuracy of on-line monitoring of swimming pool water quality by ORP (oxidation reduction potential). Methods In June 2013, ORP and traditional assay were used to monitor the water quality of test and control swimming pools. The indicators included pH value, redox potential, chloroform concentration, total bacteria, total coliforms, Results of statistical analysis. Measurement data using t test, P <0.05 for the difference was statistically significant. Results ORP (709.6 ± 4.0) mV, pH (7.37 ± 0.06), ORP (707.2 ± 3.7) mV, pH value (7.39 ± 0.06) and field data ORP (707.7 ± 4.1) mV (7.39 ± 0.07), the difference was not statistically significant (all P> 0.05). The use of online ORP monitoring can control the concentration of residual chlorine in water to reduce the production of trichloromethane in swimming pool water. Conclusion ORP on-line monitoring equipment is stable and can be used for on-line monitoring of ORP in swimming pool water for a long time, effectively controlling the concentration of trichloromethane in swimming pool water and ensuring effective control of microorganisms.