NS EN 12139 Ed. 1 (1999)現(xiàn)行
Surface Active Agents - Determination Of The Total Polyethylene Glycol Content Of Non-ionic Surface Active Agents (eo-adducts) By Hplc/gpc
出版：Norwegian Standards (Norges Standardiseringsforbund)
專家解讀視頻
Defines a method for the determination of the total polyethylene glycol (PEG) content of aromatic and aliphatic non-ionic surface active agents of the type R-(O-C2H4)p-OH, where 'p' is the mean ethylene oxide (EO) value. Applicable for concentrations of PEG higher than approximately 0,1g/100g of the laboratory sample. Applicable to a degree of ethoxylation of at least 25 for products which are soluble in an 80/20 (V/V) mixture of methanol and water. Long-chain products with a low degree of ethoxylation, such as tallow alcohol 5 EO, are not soluble, and require an enamelled preliminary treatment.
NEN EN 12139:1999 - Identical
SS EN 12139 Ed. 1 (1999) - Identical
UNE EN 12139:1999 - Identical
NBN EN 12139:1999 - Identical
ONORM EN 12139:1999 - Identical
DIN EN 12139 (1999-04) - Identical
BS EN 12139:1999 - Identical
SN EN 12139:1999 - Identical
NF EN 12139:1999 - Identical
UNI EN 12139:2001 - Identical
I.S. EN 12139:1999 - Identical
