摘要
建立了微波消解-磷钼蓝分光光度法测定城市污泥中总磷的方法。在微波环境中硝酸-过氧化氢能够将城市污泥中无机磷盐和含磷有机物消解为正磷酸盐,在弱酸性条件下,正磷酸盐在铋盐的催化条件下与钼酸铵-抗坏血酸生成磷钼蓝,于分光光度计波长690nm处进行测定总磷浓度。方法的相对标准偏差0.63%~0.95%,加标回收率为101%~102%,能够满足对城市污泥中总磷浓度的测定要求。
A method for the determination of total phosphorus in municipal sewage sludge by microwave digestion-phosphomolybdenum blue spectrophotometry was developed in this research.Nitric acid-hydrogen peroxide can digest insoluble salts and phosphorus-containing organic matterinmunicipal sludge into orthophosphate in microwave environment.Under low acidic conditions,orthophosphate reacts with ammonium molybdate-ascorbic acid with the catalytic condition of bismuth salt to form phosphomolybdenum blue under.The total phosphorus concentration is determined at 690 nm of the spectrophotometer wavelength.The analytical results show that the relative standard deviation is 0.63%-0.95%,and recovery 101%-102%.This method can meet the requirement of determination of total phosphorus concentration in municipal sludge.
作者
蒯丽君
郝俊
孔详科
杨劲松
KUAI Lijun;HAO Jun;KONG Xiangke;YANG Jinsong(BGRIMM MTC Technology Co.Ltd.,Beijing 102628,China;Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang,Hebei 050061,China)
出处
《中国无机分析化学》
CAS
2019年第5期25-29,共5页
Chinese Journal of Inorganic Analytical Chemistry
基金
国家重点研发计划国家重大仪器设备开发重点专项（2016YFF0102500）
关键词
城市污泥
总磷
微波消解
municipal sewage sludge
total phosphorus
microwave digestion
