WebAug 10, 2024 · Qingliu River (118.01~118.59°N, 32.20~32.38°E), a secondary tributary of the Yangtze River, is located in the middle-lower reaches of the Yangtze River plains (Zhang et al. 2009 ). As a typical urban river with areas of 1252 km 2 and 84 km long, its runs through Chuzhou City (approximately 1400 years of history). Web高锰酸盐指数测定方法（GB11892-89酸性法）的探讨. 陈小霞. Published 2012. Biology. 高锰酸盐指数值的测定影响因素较多，本文从反应酸度和加热时间两个方面进行研究.结果表明：在相同加热时间内，CODMn测定值随着反应酸度的增大而逐渐增大；在同一酸度情况下。. …
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WebFeb 1, 2008 · GB 11892-89, 1990. Water quality-determination of Permanganate index. The State Environmental Protection Administration of China. GB 11914-89, 1990. Water quality-determination of the chemical oxygen demand-dichromate method. The State Environmental Protection Administration of China. GB 3838-2002, 2002. WebOct 1, 2024 · The water chemistry parameters were determined by standard methods including pH (on site), dissolved oxygen (DO, on site), chemical oxygen demand (COD, GB11892-89), total organic carbon (TOC, GB13193-91), total phosphorus (TP, GB11893-89), total nitrogen (TN, GB1189 4-8 9) and ammonia nitrogen (NH3 -N, GB7479-87). poetry command not found linux
Water quality status response to multiple …
Web单价： 19000.00元/台 起订： 1 台 服务： 资质已核查 已通过真实性核验 已通过实地验厂核验 主营产品： 核酸采样亭;核酸采样箱;核酸采样工作台;核酸采样小屋 Webindex was determined by redox titration "GB11892" -89". All the data were statistically analyzed by Excel, and Excel2007 software was used for drawing and table, and the maximum, minimum, and average values were calculated, and the analysis was performed by inserting a line graph. The data are expressed by (average soil standard deviation), WebSep 6, 2024 · The practical permanganate index tester is designed and developed according to the national standard GB11892-89. It adopts imported optical components and has stable and reliable performance. With the 5-inch large-screen display, the interface is simple and easy to understand, and the user can use it quickly and accurately. poetry collections 2022