Gb 11914-89
http://codeofchina.com/standard/GBT11914-1989.html WebSS Gravimetric method (GB 11901-89) COD Dichromate method (GB 11914-89) BOD 5 5-day BOD test TN Alkaline potassium per-sulfate digestion—UV spectrophotometric method (GB11894-89) NH 3 +–N Nessler’s reagent colormetric method (GB7974-87) NO 3 −–N phenoldisulfonic acid spectrophotometric method (GB 7480-87) NO 2
Gb 11914-89
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Web本文档为【(完整word版)COD标准测定方法国标GB11914-89化学需氧量的测定】，请使用软件OFFICE或WPS软件打开。作品中的文字与图均可以修改和编辑， 图片更改请在作品中右键图片并更换，文字修改请直接点击文字进行修改，也可以新增和删除文档中的内容。 WebNational standard GB 11914-89 specification analysis method to make the water quality of the determination of chemical oxygen demand (COD) COD (cr) steps, strictly stipulated the method of heating digestion time, solution acidity, the dosage of the catalyst and oxidant conditions. It is obvious that water quality determination of COD (cr) is ...
Websical method (GB 11914-89) [6]. Consequently, during the supervision of law enforcement, the COD determination of samples with high requirements such as discharge sample, assessment sample, arbitration analysis sample is preferred by the classical method (GB 11914-89). Considering the current research situation mentioned above, the aim of the WebApr 25, 2013 · GB 11914-89 (1989) Water quality-determination of the chemical oxygen demand-dichromate method, National Standard of People’s Republic of China. Jasudkar …
WebBy the COD value of standard GB 11914-89 water quality-COD determination-potassium dichromate method tracer liquid product A 4, the result is as shown in table 1. A4 stirs with product liquid, forms suspension; Get suspension 1000 grams then, left standstill 24 hours, remove supernatant solution, and take by weighing sedimentary weight, the ...
WebThe COD is analyzed by the dichromate method (GB 11914-89), in which K 2 Cr 2 O 7 is used to oxidize the COD in the analyzed water, and the NH 3 -N content is tested by an online ammonia analyzer. ...
WebDec 13, 2013 · The COD of the water was detected according to Chinese standard GB 11914-89. And the chrominance was determined by dilution method provided by the Chinese standard GB 11903-89. The pH value was detected using a pH211 desktop pH meter (HANNA, Italy). 2.4. UV–Vis analysis. care homes in great aytonWebexperiments based on the Chinese national standard GB 11914-89, and then the mechanism of interferences was explained. After that, based on the theoretical analysis … care homes in gravesend kentWebGB/T 11914-1989 is referred in: * GB 27632-2011 Emission standard of pollutants for rubber products industry * GB 21904-2008 Discharge standards of water pollutants for … care homes in grappenhall warringtonWebThe COD is analyzed by the dichromate method (GB 11914-89), in which K 2 Cr 2 O 7 is used to oxidize the COD in the analyzed water, and the NH 3 -N content is tested by an … brooks hospital patient portalWebing to Chinese standard methods (GB 11914-89) a er ltration by 0.45 mm lters. UV-Vis absorption spectra were detected by … care homes in graysWebProduct liquid D1 after obtaining handling, by the COD value of standard GB 11914-89 water quality-COD determination-potassium dichromate method tracer liquid product D 1, the … brookshore homesWeb(完整word版)COD标准测定方法国标GB11914-89化学需氧量的测定COD国标法GB11914-89，水质化学需氧量的测定1 应用范围本标准规定了水中化学需氧量的测定方法。本标 … care homes in great baddow