摘要
生化需氧量(BOD)是环境监测中反映水质好坏的重要参数,本文依据碘酸钾为基准,提出了碘酸钾-淀粉光度测定水样中BOD5的新方法。实验以碘酸钾与过量碘化钾生成单质碘,新生成的单质碘与淀粉生成的蓝色物质在574 nm处有最大吸收,采用光度法测定5天前后培养水样中溶解氧的含量来计算水样中BOD5。所拟方法用于BOD5标准样品溶液、葡萄糖-谷氨酸标准溶液和污水厂进出口水样中BOD5的测定,结果与国家标准方法所得结果相一致。
The biochemical oxygen demand（BOD） is an important parameter in reflecting the water quality in the environmental monitoring. The method of determining BOD5 in water by potassium iodate-starch spectrophotometry was built on the reaction between KIO3 which employed as the standard solution and excessive KI. The released I2 could react with the starch to form a blue complex, which had the maximum absorbance at 574 nm. BOD5 in water could be calculated through the amount of dissolved oxygen before and after 5 days determined. The method was used to the determination of biochemical oxygen demand in different water samples, such as BOD5 standard sample, glucose-glutamic acid solution and influent and effluent water from waste water factory and the results were in agreement with those of the national standard method.
出处
《冶金分析》
CAS
CSCD
北大核心
2008年第7期23-27,共5页
Metallurgical Analysis
基金
江苏省高校自然科学研究计划资助项目(05KJB150003)
江苏省海洋生物技术重点建设实验室基金资助项目(2005HS010)
关键词
生化需氧量
分光光度法
碘酸钾
淀粉
biochemical oxygen demand （BOD）
spectrophotometry
potassium iodate
starch
