NEFRAS with 50/170 GOST 8505-80 (with amendments 1-3) |
№ |
Indicators |
Standard |
1 |
fractional composition |
|
• initial temperature of distillation, оС, not lower |
50 |
• 10% distils at temperature, оС, not higher |
88 |
• 50 % distils at temperature, оС, not higher |
105 |
• 90 % distils at temperature, оС, not higher |
145 |
• 97,5 % distils at temperature, оС, not higher |
170 |
• residue in the flask after distillation, %, max |
1,0 |
2 |
mass fraction of sulfur, %, max |
0,02 |
3 |
iodine value, g of iodine per 100 g of nefras, max |
1,3 |
4 |
content of soluble acids and alkali |
no |
5 |
acidity, mg КОН per 100 cm3 of nefras, max |
0,5 |
6 |
content of soluble gum, mg on 100 cm3 of nefras, max |
2 |
7 |
test on copper plate |
resistant |
8 |
content of mechanical impurities and water |
no |
9 |
test on formation of oil spot |
resistant |
|
|