GB/T 5686.2-2008 Translated English of Chinese Standard. (GBT 5686.2-2008, GB/T5686.2-2008, GBT5686.2-2008): Ferromanganese, ferromanganese-silicon, nitrogenbearing ferromanganese and manganese metal - Determination of silicon content - Molybdenum blue photometric method, silicon potassium fluoride titrimetric method and perchloric acid dehydration gravimetric methodhttps://www.chinesestandard.net, 2 ago 2020 - 16 pagine This Part specifies the determination of silicon content in ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese, manganese metal and electrolytic manganese by the molybdenum blue photometric method, silicon potassium fluoride titrimetric method and perchloric acid dehydration gravimetric method. |
Sommario
| 3 | |
Scope | 5 |
Normative references | 6 |
Method II Silicon potassium fluoride titrimetric method | 9 |
Method III Perchloric acid dehydration gravimetric method | 12 |
Test report | 16 |
Parole e frasi comuni
300 mL beaker acid dehydration gravimetric add 20 mL ammonium ferrous sulfate ammonium molybdate Ammonium thiocyanate Analysis steps anhydrous sodium carbonate blue photometric method Congo red content mass fraction dehydration gravimetric method determination of silicon determination range mass dissolve drops of phenolphthalein electrolytic manganese metal filter paper fluoride titrimetric method g of anhydrous g of sample GB/T grams g heat hot water hydrochloric acid hydrofluoric acid Hydrogen peroxide hydroxide standard solution hydroxide standard titration Instruments Common laboratory melt metal and electrolytic mg of silicon mL volumetric flask molybdenum blue photometric nitric acid nitrogen-bearing ferromanganese perchloric acid dehydration phenolphthalein solution 4.2.9 Pipette Place the sample platinum crucible potassium fluoride titrimetric potassium hydrogen phthalate range mass fraction samples shall pass Silicon content mass silicon potassium fluoride Silver nitrate sodium carbonate 5.2.2 sodium hydroxide standard spectrophotometer standard titration solution sulfuric acid test solution washing liquor watch glass water to dilute water to wash