GB/T 8572-2010 Translated English of Chinese Standard (GBT 8572-2010, GB/T8572-2010, GBT8572-2010): Determination of total nitrogen content for compound fertilizers titrimetric method after distillationhttps://www.chinesestandard.net, 8. lip 2017. - Broj stranica: 10 This Standard specifies the determination of total nitrogen content for compound fertilizers. This Standard does not apply to compound fertilizers with organic compounds greater than 7 % (except urea, cyanamide compounds). |
Uobičajeni izrazi i fraze
1500 W electric 60 minutes acid smoke emits acid solution c(1/2 ADD 20 mL ADD 22 g ADD 35 mL amide amide nitrogen ammonia ammonium nitrogen ADD carefully ADD 25 carefully ADD 250 chromium powder compound fertilizers titrimetric content for compound CONTINUE to heat cooled to room cyanamide nitrogen Determination of total distillation apparatus distillation flask distillation process emits for 15 fertilizers titrimetric method flask is cooled fume hood heat until sulfuric heating device 5.5 heating strength hydrochloric acid hydroxide solution 4.8 method after distillation Methyl red mixed catalyst mL of sulfuric mL of water mol/L nitric acid nitrogen nitrogen alloy nitrogen and ammonium pear-shaped glass funnel PLACE the distillation PLUG the pear-shaped Potassium sulfate process is 100 reagents rest steps room temperature SHAKE to dissolve Silicone grease sodium hydroxide solution sodium hydroxide standard sulfuric acid 4.1 sulfuric acid smoke sulfuric acid solution total nitrogen content urea water for compound