微波密封消解法快速测定水中化学需氧量  

Microwave Sealed Digestion Method for Rapid Determination of Chemical Oxygen Demand in Water

作　　者：曾祥春 符方琪 廖斌 

机构地区：[1]海口市供排水水质监测站,海南海口570208

出　　处：《海南师范大学学报（自然科学版）》2010年第4期417-419,468,共4页Journal of Hainan Normal University（Natural Science）

摘　　要：利用微波密封消解15min代替传统的加热回流2h测定水中CODCr,该法经国家系列标准样品验证,其测定相对误差最大为0.5%,相对标准偏差最大为6.4%,加标回收率为95%～100%.实际水样测定与传统回流法比较,其相对误差在-11.3%～0.4%;对于高氯水样的测定,当氯离子浓度在5000mg/L以下时,测得的CODCr值都是准确可靠的.Using microwave sealed digestion heating for 15 minutes instead of 2 hours conventional reflux,the chemical oxygen demand was determined,and the results showed：after being validated by series of national standard samples,the maximum relative error of the determination was 0.5% and maximum relative standard deviation was 6.4%,the recovery rate was 95%～100%.Compared with traditional reflux,the relative error was-11.3%～0.4%.For determination of water samples with high concentration of chloride ion,when the chloride ion concentration was below 5 000 mg/L,CODcr values measured were accurate and reliable.

关 键 词：微波 密封消解 化学需氧量 测定 

分 类 号：N33[自然科学总论]