Gb 11914-89
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 … WebMay 1, 2024 · This standard specifies the dichromate method used to determine chemical oxygen demand in surface water, municipal wastewater, and industrial sewage. This …
Gb 11914-89
Did you know?
Web本标准于2024-5-1代替 GB/T 11914-1989 水质 化学需氧量的测定 重铬酸盐法. 本标准规定了测定水中化学需氧量的重铬酸盐法。. 本标准适用于地表水、生活污水和工业废水中化学 … 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 ...
WebNational Standard GB 11914-89 (Dichromate method) and HJ 535-2009 (Nessler’s reagent spectrophotometry). In addi-tion, the biochemical oxygen demand, total nitrogen (TN) and total phosphorus (TP) measurement were followed by GB 7488-87 (Dilution and inoculation method), GB 11894-89 (Alkaline potassium persulfate digestion-UV spectrophoto- Web(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 …
WebMar 25, 2024 · This standard specifies the method for determination of chemical oxygen demand in water. This standard applies to all types of COD with a value greater than … WebSep 29, 2024 · The COD value of MB solution before and after treatment was determined according to GB-11914-89 standard, and was calculated according to formula . $$ {\text{COD (ppm)}} = \frac{{C \times (V_{0} - V_{1} )}}{{V_{2} }} \times f, $$ ... but the nitrogen element content was only 2.89% according to formula , indicating the content of direct …
http://codeofchina.com/standard/GB11914-1989.html
WebAt present, the classical K 2 Cr 2 O 7 method (GB 11914-89) is used to determine COD in water sample by concentrated H 2 SO 4 -assisted heating reflux. During the reaction … targi lne programWeb• Thermal digestion acc. to DIN38409 H41 and GB 11914-89 • Measuring ranges 5 to 200 mg/l O2 or 50 to 5000 mg/l O2 • Mercury-free chloride elimination • Low reagent … targi opolagraWebGB/T 11914-1989 水质化学需氧量的测定 重铬酸盐法. 本标准规定了水中化学需氧量的测定方法。. 本标准适用于各种类型的含COD值大于30m g/L的水样，对未经稀释的水样的测定 … targi izraela \u0026 centrum kongresoweWebSS 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 targi hvac 2023WebProduct 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 … targi druku i reklamyWebing to Chinese standard methods (GB 11914-89) a er ltration by 0.45 mm lters. UV-Vis absorption spectra were detected by … targi izraela \\u0026 centrum kongresoweWebGB 11914-89 Water quality - Determination of the chemical oxygen demand - Dichromate method When the above standard is revised, the latest version shall be used. 3 … batchmaster sap